CY7C65113 [ETC]
Universal Serial Bus ; 通用串行总线\n
| 型号： | CY7C65113 |
| 厂家： | 
ETC |
| 描述： | Universal Serial Bus
|
| 文件： | 总51页 (文件大小：421K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CY7C65013
CY7C65113
USB Hub with Microcontroller
Cypress Semiconductor Corporation
Document #: 38-08002 Rev. *B
•
3901 North First Street
•
San Jose, CA 95134
•
408-943-2600
Revised March 12, 2003
CY7C65013
CY7C65113
TABLE OF CONTENTS
1.0 FEATURES .....................................................................................................................................6
2.0 FUNCTIONAL OVERVIEW .............................................................................................................7
3.0 PIN CONFIGURATIONS .................................................................................................................9
4.0 PRODUCT SUMMARY TABLES ....................................................................................................9
4.1 Pin Assignments .......................................................................................................................9
4.2 I/O Register Summary .............................................................................................................10
4.3 Instruction Set Summary ..........................................................................................................11
5.0 PROGRAMMING MODEL .............................................................................................................12
5.1 14-bit Program Counter ...........................................................................................................12
5.1.1 Program Memory Organization ......................................................................................................13
5.2 8-bit Accumulator (A) ...............................................................................................................14
5.3 8-bit Temporary Register (X) ...................................................................................................14
5.4 8-bit Program Stack Pointer (PSP) ..........................................................................................14
5.4.1 Data Memory Organization ............................................................................................................14
5.5 8-bit Data Stack Pointer (DSP) ................................................................................................15
5.6 Address Modes ........................................................................................................................15
5.6.1 Data (Immediate) ...........................................................................................................................15
5.6.2 Direct ..............................................................................................................................................15
5.6.3 Indexed ..........................................................................................................................................15
6.0 CLOCKING ....................................................................................................................................16
7.0 RESET ...........................................................................................................................................16
7.1 Power-on Reset .......................................................................................................................16
7.2 Watchdog Reset ......................................................................................................................17
8.0 SUSPEND MODE ..........................................................................................................................17
9.0 GENERAL-PURPOSE I/O PORTS ...............................................................................................18
9.1 GPIO Configuration Port ..........................................................................................................19
9.2 GPIO Interrupt Enable Ports ....................................................................................................20
10.0 12-BIT FREE-RUNNING TIMER .................................................................................................21
11.0 I2C CONFIGURATION REGISTER ............................................................................................22
12.0 I2C-COMPATIBLE CONTROLLER ............................................................................................22
13.0 PROCESSOR STATUS AND CONTROL REGISTER ...............................................................24
14.0 INTERRUPTS ..............................................................................................................................25
14.1 Interrupt Vectors ....................................................................................................................27
14.2 Interrupt Latency ....................................................................................................................28
14.3 USB Bus Reset Interrupt ........................................................................................................28
14.4 Timer Interrupt .......................................................................................................................28
14.5 USB Endpoint Interrupts ........................................................................................................28
14.6 USB Hub Interrupt ..................................................................................................................28
14.7 GPIO Interrupt ........................................................................................................................29
14.8 I2C Interrupt ............................................................................................................................29
15.0 USB OVERVIEW .........................................................................................................................30
15.1 USB Serial Interface Engine (SIE) .........................................................................................30
15.2 USB Enumeration ..................................................................................................................30
Document #: 38-08002 Rev. *B
Page 2 of 51
CY7C65013
CY7C65113
TABLE OF CONTENTS (continued)
16.0 USB HUB ....................................................................................................................................31
16.1 Connecting/Disconnecting a USB Device ..............................................................................31
16.2 Enabling/Disabling a USB Device ..........................................................................................32
16.3 Hub Downstream Ports Status and Control ...........................................................................32
16.4 Downstream Port Suspend and Resume ...............................................................................34
16.5 USB Upstream Port Status and Control .................................................................................35
17.0 USB SERIAL INTERFACE ENGINE OPERATION ....................................................................36
17.1 USB Device Addresses ..........................................................................................................36
17.2 USB Device Endpoints ...........................................................................................................37
17.3 USB Control Endpoint Mode Registers ..................................................................................37
17.4 USB Non-control Endpoint Mode Registers ...........................................................................38
17.5 USB Endpoint Counter Registers .......................................................................................... 39
17.6 Endpoint Mode/Count Registers Update and Locking Mechanism ........................................39
18.0 USB MODE TABLES ..................................................................................................................41
19.0 REGISTER SUMMARY ...............................................................................................................45
20.0 SAMPLE SCHEMATIC ...............................................................................................................47
21.0 ABSOLUTE MAXIMUM RATINGS .............................................................................................47
22.0 ELECTRICAL CHARACTERISTICS ...........................................................................................48
23.0 SWITCHING CHARACTERISTICS (f
= 6.0 MHz) ..................................................................................... 48
OSC
24.0 ORDERING INFORMATION .......................................................................................................49
25.0 PACKAGE DIAGRAMS ..............................................................................................................49
Document #: 38-08002 Rev. *B
Page 3 of 51
CY7C65013
CY7C65113
LIST OF FIGURES
Figure 5-1. Program Memory Space with Interrupt Vector Table ........................................................ 13
Figure 6-1. Clock Oscillator On-Chip Circuit ........................................................................................ 16
Figure 7-1. Watchdog Reset (Address 0x26) ...................................................................................... 17
Figure 9-1. Block Diagram of a GPIO Pin ............................................................................................ 18
Figure 9-2. Port 0 Data ........................................................................................................................ 18
Figure 9-3. Port1 Data ......................................................................................................................... 18
Figure 9-4. Port 2 Data ........................................................................................................................ 18
Figure 9-6. GPIO Configuration Register ............................................................................................. 19
Figure 9-5. Port 3 Data ........................................................................................................................ 19
Figure 9-7. Port 0 Interrupt Enable ...................................................................................................... 20
Figure 9-8. Port 1 Interrupt Enable ...................................................................................................... 20
Figure 10-1. Timer LSB Register ......................................................................................................... 21
Figure 10-2. Timer MSB Register ........................................................................................................ 21
Figure 9-9. Port 2 Interrupt Enable ...................................................................................................... 21
Figure 9-10. Port 3 Interrupt Enable .................................................................................................... 21
Figure 10-3. Timer Block Diagram ....................................................................................................... 22
Figure 11-1. I2C Configuration Register ............................................................................................... 22
Figure 12-1. I2C Data Register ............................................................................................................. 23
Figure 12-2. I2C Status and Control Register ...................................................................................... 23
Figure 13-1. Processor Status and Control Register ........................................................................... 24
Figure 14-1. Global Interrupt Enable Register ..................................................................................... 25
Figure 14-2. USB Endpoint Interrupt Enable Register ......................................................................... 26
Figure 14-3. Interrupt Controller Function Diagram ............................................................................. 27
Figure 14-4. GPIO Interrupt Structure ................................................................................................. 29
Figure 16-1. Hub Ports Connect Status ............................................................................................... 31
Figure 16-2. Hub Ports Speed ............................................................................................................. 31
Figure 16-3. Hub Ports Enable Register .............................................................................................. 32
Figure 16-4. Hub Downstream Ports Control Register ........................................................................ 33
Figure 16-5. Hub Ports Force Low Register ........................................................................................ 33
Figure 16-6. Hub Ports Force Low Register ........................................................................................ 33
Figure 16-7. Hub Ports SE0 Status Register ....................................................................................... 33
Figure 16-8. Hub Ports Data Register ................................................................................................. 34
Figure 16-9. Hub Ports Suspend Register ........................................................................................... 34
Figure 16-10. Hub Ports Resume Status Register .............................................................................. 35
Figure 16-11. USB Status and Control Register .................................................................................. 35
Figure 17-1. USB Device Address Registers ....................................................................................... 36
Figure 17-2. USB Device Endpoint Zero Mode Registers ................................................................... 37
Figure 17-3. USB Non-control Device Endpoint Mode Registers ........................................................ 38
Figure 17-4. USB Endpoint Counter Registers .................................................................................... 39
Figure 17-5. Token/Data Packet Flow Diagram ................................................................................... 40
Document #: 38-08002 Rev. *B
Page 4 of 51
CY7C65013
CY7C65113
LIST OF TABLES
Table 4-1. Pin Assignments ...................................................................................................................9
Table 4-2. I/O Register Summary ........................................................................................................10
Table 4-3. Instruction Set Summary ....................................................................................................11
Table 9-1. GPIO Port Output Control Truth Table and Interrupt Polarity .............................................20
Table 11-1. I2C Port Configuration .......................................................................................................22
Table 12-1. I2C Status and Control Register Bit Definitions .................................................................23
Table 14-1. Interrupt Vector Assignments ...........................................................................................27
Table 16-1. Control Bit Definition for Downstream Ports .....................................................................33
Table 16-2. Control Bit Definition for Upstream Port ...........................................................................36
Table 17-1. Memory Allocation for Endpoints .....................................................................................37
Table 18-1. USB Register Mode Encoding ..........................................................................................41
Table 18-2. Decode table for Table 18-3: “Details of Modes for Differing Traffic Conditions” .............42
Table 18-3. Details of Modes for Differing Traffic Conditions (see Table 18-2 for the decode legend) 43
Document #: 38-08002 Rev. *B
Page 5 of 51
CY7C65013
CY7C65113
1.0
Features
• USB hub with an integrated microcontroller
• 8-bit USB optimized microcontroller
— Harvard architecture
— 6-MHz external clock source
— 12-MHz internal CPU clock
— 48-MHz internal hub clock
• Internal memory
— 256 bytes of RAM
— 8 KB of PROM
• Integrated Master/Slave I2C-compatible Controller (100 kHz) enabled through General-purpose I/O (GPIO) pins
• I/O ports
— Three GPIO ports (Port 0 to 2) capable of sinking 7 mA per pin (typical)
— An additional GPIO port (Port 3) capable of sinking 12 mA per pin (typical) for high current requirements: LEDs
— Higher current drive achievable by connecting multiple GPIO pins together to drive a common output
— EachGPIO portcanbeconfiguredasinputswith internal pull-ups or opendrainoutputsor traditionalCMOSoutputs
— Maskable interrupts on all I/O pins
• 12-bit free-running timer with one microsecond clock ticks
• Watchdog timer (WDT)
• Internal Power-on Reset (POR)
• USB Specification compliance
— Conforms to USB Specification, Version 1.1
— Conforms to USB HID Specification, Version 1.1
— Supports one or two device addresses with up to 5 user-configured endpoints
Up to two 8-byte control endpoints
Up to four 8-byte data endpoints
Up to two 32-byte data endpoints
— Integrated USB transceivers
— Supports seven (CY7C65013) or four (CY7C65113) downstream USB ports
— GPIO pins can provide individual power control outputs for each downstream USB port
— GPIO pins can provide individual port over current inputs for each downstream USB port
• Improved output drivers to reduce electromagnetic interference (EMI)
• Operating voltage from 4.0V to 5.5V DC
• Operating temperature from 0° to 70° C
• CY7C65013 available in 48-pin PDIP (-PC) or 48-pin SSOP (-PVC) packages
• CY7C65113 available in 28-pin SOIC (-SC) or 28-pin PDIP (-PC) packages
• Industry-standard programmer support.
Document #: 38-08002 Rev. *B
Page 6 of 51
CY7C65013
CY7C65113
2.0
Functional Overview
The CY7C65x13 devices are one-time programmable 8-bit microcontrollers with a built-in 12-Mbps USB hub that supports up to
seven downstream ports. The microcontroller instruction set has been optimized specifically for USB operations, although the
microcontrollers can be used for a variety of non-USB embedded applications.
GPIO
CY7C65013
The CY7C65013 features 22 GPIO pins to support USB and other applications. The I/O pins are grouped into four ports (P0[7:0],
P1[7:4,2:0], P2[7:3], P3[1:0]) where each port can be configured as inputs with internal pull-ups, open drain outputs, or traditional
CMOS outputs. Ports 0 to 2 are rated at 7 mA per pin (typical) sink current. Port 3 pins are rated at 12 mA per pin (typical) sink
current, which allows these pins to drive LEDs. Multiple GPIO pins can be connected together to drive a single output for more
drive current capacity. Additionally, each I/O pin can be used to generate a GPIO interrupt to the microcontroller. All of the GPIO
interrupts all share the same “GPIO” interrupt vector.
CY7C65113
The CY7C65113 has 11 GPIO pins (P0[7:0], P1[2:0]), both rated at 7 mA per pin (typical) sink current. Multiple GPIO pins can
be connected together to drive a single output for more drive current capacity.
Clock
The microcontroller uses an external 6-MHz crystal and an internal oscillator to provide a reference to an internal phase-locked
loop (PLL)-based clock generator. This technology allows the customer application to use an inexpensive 6-MHz fundamental
crystal that reduces the clock-related noise emissions (EMI). A PLL clock generator provides the 6-, 12-, and 48-MHz clock signals
for distribution within the microcontroller.
Memory
The CY7C65013 and the CY7C65113 are offered with 8 KB of PROM.
Power-on Reset, Watchdog, and Free-running Timer
These parts include power-on reset logic, a Watchdog timer, and a 12-bit free-running timer. The POR logic detects when power
is applied to the device, resets the logic to a known state, and begins executing instructions at PROM address 0x0000. The
Watchdog timer is used to ensure the microcontroller recovers after a period of inactivity. The firmware may become inactive for
a variety of reasons, including errors in the code or a hardware failure such as waiting for an interrupt that never occurs.
I2C
The microcontroller can communicate with external electronics through the GPIO pins. An I2C-compatible interface accommo-
dates a 100-kHz serial link with an external device.
Timer
The free-running 12-bit timer clocked at 1 MHz provides two interrupt sources, 128-µs and 1.024-ms. The timer can be used to
measure the duration of an event under firmware control by reading the timer at the start of the event and after the event is
complete. The difference between the two readings indicates the duration of the event in microseconds. The upper four bits of
the timer are latched into an internal register when the firmware reads the lower eight bits. A read from the upper four bits actually
reads data from the internal register, instead of the timer. This feature eliminates the need for firmware to try to compensate if the
upper four bits increment immediately after the lower eight bits are read.
Interrupts
The microcontroller supports ten maskable interrupts in the vectored interrupt controller. Interrupt sources include the USB Bus
Reset interrupt, the 128-µs (bit 6) and 1.024-ms (bit 9) outputs from the free-running timer, five USB endpoints, the USB hub, the
GPIO ports, and the I2C-compatible master mode interface. The timer bits cause an interrupt (if enabled) when the bit toggles
from LOW ‘0’ to HIGH ‘1’. The USB endpoints interrupt after the USB host has written data to the endpoint FIFO or after the USB
controller sends a packet to the USB host. The GPIO ports also have a level of masking to select which GPIO inputs can cause
a GPIO interrupt. Input transition polarity can be programmed for each GPIO port as part of the port configuration. The interrupt
polarity can be rising edge (‘0’ to ‘1’) or falling edge (‘1’ to ‘0’).
USB
The CY7C65013 and CY7C65113 include an integrated USB Serial Interface Engine (SIE) that supports the integrated periph-
erals and the hub controller function. The hardware supports up to two USB device addresses with one device address for the
hub (two endpoints) and a device address for a compound device (three endpoints). The SIE allows the USB host to communicate
with the hub and functions integrated into the microcontroller. The CY7C65113 part includes a 1:4 hub repeater with one upstream
port and four downstream ports, while the CY7C65013 part includes a 1:7 hub repeater. The USB Hub allows power management
control of the downstream ports by using GPIO pins assigned by the user firmware. The user has the option of ganging the
downstream ports together with a single pair of power management pins, or providing power management for each port with four
(CY7C65113) or seven (CY7C65013) pairs of power management pins.
Document #: 38-08002 Rev. *B
Page 7 of 51
CY7C65013
CY7C65113
Logic Block Diagram
6-MHz crystal
USB
Transceiver
D+[0]
D–[0]
Upstream
USB Port
Downstream USB Ports
PLL
USB
Transceiver
D+[1]
D–[1]
48 MHz
Clock
12-MHz
8-bit
CPU
Divider
USB
Transceiver
D+[4]
D–[4]
12 MHz
Repeater
USB
SIE
USB
Transceiver
PROM
8 KB
D+[5]
D–[5]
USB
Transceiver
RAM
256 byte
Interrupt
Controller
D+[7]
D–[7]
CY7C65013 only
6 MHz
Power management under firmware
control using GPIO pins
12-bit
Timer
P0[0]
P0[7]
GPIO
PORT 0
Watchdog
Timer
P1[0]
P1[2]
GPIO
PORT 1
Power-on
Reset
P2[7]
P2[3]
GPIO
PORT 2
High Current
Outputs
GPIO
PORT 3
P3[1]
P3[0]
CY7C65013 only
I2C comp.
Interface
SCLK
SDATA
*I2C-compatible interface enabled by firmware through
P2[1:0] or P1[1:0]
Document #: 38-08002 Rev. *B
Page 8 of 51
CY7C65013
CY7C65113
3.0
Pin Configurations
Top View
CY7C65013
CY7C65113
28-pin SOIC
48-pin SSOP
XTALOUT
1
2
3
4
48
47
46
V
CC
XTALOUT
XTALIN
1
2
3
4
28
27
26
V
CC
P1[0]
P1[2]
P1[4]
P1[6]
P3[0]
D–[3]
D+[3]
XTALIN
P1[1]
P1[5]
P1[7]
P3[1]
D+[0]
D–[0]
GND
P1[1]
P1[0]
P1[2]
D–[3]
D+[3]
D–[4]
D+[4]
V
REF
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
GND
D+[0]
D–[0]
D+[1]
D–[1]
D+[2]
D–[2]
P0[7]
P0[5]
P0[3]
P0[1]
25
24
23
22
21
20
19
18
17
16
15
5
5
6
6
7
7
8
8
9
GND
D–[4]
D+[4]
9
GND
D+[1]
D–[1]
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
10
11
12
13
14
V
PP
P0[0]
P0[2]
P0[4]
P0[6]
V
V
REF
REF
D+[2]
D–[2]
P2[3]
GND
P2[5]
D+[7]
D–[7]
P2[7]
P0[7]
P0[5]
P0[3]
P0[1]
D–[5]
D+[5]
GND
P2[4]
D–[6]
D+[6]
P2[6]
V
PP
P0[0]
P0[2]
P0[4]
P0[6]
4.0
4.1
Product Summary Tables
Pin Assignments
Table 4-1. Pin Assignments
Name
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
48-pin
28-pin
Description
D+[0], D–[0]
D+[1], D–[1]
D+[2], D–[2]
D+[3], D–[3]
D+[4], D–[4]
D+[5], D–[5]
D+[6], D–[6]
D+[7], D–[7]
P0
7, 8
5, 6
Upstream port, USB differential data.
10, 11
13, 14
41, 42
38, 39
35, 36
31, 32
18, 19
P1[7:0]
7, 8
Downstream Port 1, USB differential data.
Downstream Port 2, USB differential data.
Downstream Port 3, USB differential data.
Downstream Port 4, USB differential data.
Downstream Port 5, USB differential data.
Downstream Port 6, USB differential data.
Downstream Port 7, USB differential data.
9, 10
23, 24
21, 22
P1[7:0]
GPIO Port 0 capable of sinking 7 mA (typical).
21, 25, 22, 26, 23, 27, 11, 15, 12, 16, 13,
24, 28
17, 14, 18
P1
I/O
I/O
I/O
IN
P1[7:4,2:0]
5, 44, 4, 45; 46, 3, 47 25, 27, 26
P1[2:0]
GPIO Port 1 capable of sinking 7 mA (typical).
GPIO Port 2 capable of sinking 12 mA (typical).
GPIO Port 3, capable of sinking 12 mA (typical).
6-MHz crystal or external clock input.
P2
P2[7:3]
20, 30, 17,33, 15
P3
P3[1:0]
6, 43
XTALIN
2
2
Document #: 38-08002 Rev. *B
Page 9 of 51
CY7C65013
CY7C65113
Table 4-1. Pin Assignments (continued)
Name
XTALOUT
VPP
I/O
48-pin
28-pin
Description
OUT
1
1
6-MHz crystal out.
29
19
Programming voltage supply, tie to ground during normal
operation.
VCC
48
28
Voltage supply.
Ground.
GND
VREF
9, 16, 34, 40
12, 37
4, 20
3
IN
External 3.3V supply voltage for the downstream differential
data output buffers and the D+ pull up.
4.2
I/O Register Summary
I/O registers are accessed via the I/O Read (IORD) and I/O Write (IOWR, IOWX) instructions. IORD reads data from the selected
port into the accumulator. IOWR performs the reverse; it writes data from the accumulator to the selected port. Indexed I/O Write
(IOWX) adds the contents of X to the address in the instruction to form the port address and writes data from the accumulator to
the specified port. Specifying address 0 (e.g., IOWX 0h) means the I/O register is selected solely by the contents of X.
All undefined registers are reserved. Do not write to reserved registers as this may cause an undefined operation or increased
current consumption during operation. When writing to registers with reserved bits, the reserved bits must be written with ‘0.’
Table 4-2. I/O Register Summary
Register Name
Port 0 Data
I/O Address Read/Write
Function
Page
18
17
17
19
19
19
19
19
18
20
36
38
37
38
38
38
38
35
25
26
27
20
20
17
21
23
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x1F
0x20
0x21
0x23
0x24
0x25
0x26
0x28
0x29
R/W
R/W
R/W
R/W
W
GPIO Port 0 Data
GPIO Port 1 Data
GPIO Port 2 Data
GPIO Port 3 Data
Port 1 Data
Port 2 Data
Port 3 Data
Port 0 Interrupt Enable
Port 1 Interrupt Enable
Port 2 Interrupt Enable
Port 3 Interrupt Enable
GPIO Configuration
I2C Configuration
USB Device Address A
EP A0 Counter Register
EP A0 Mode Register
EP A1 Counter Register
EP A1 Mode Register
EP A2 Counter Register
EP A2 Mode Register
USB Status & Control
Global Interrupt Enable
Endpoint Interrupt Enable
Interrupt Vector
Interrupt Enable for Pins in Port 0
Interrupt Enable for Pins in Port 1
Interrupt Enable for Pins in Port 2
Interrupt Enable for Pins in Port 3
GPIO Port Configurations
W
W
W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
I2C Position Configuration
USB Device Address A
USB Address A, Endpoint 0 Counter
USB Address A, Endpoint 0 Configuration
USB Address A, Endpoint 1 Counter
USB Address A, Endpoint 1 Configuration
USB Address A, Endpoint 2 Counter
USB Address A, Endpoint 2 Configuration
USB Upstream Port Traffic Status and Control
Global Interrupt Enable
USB Endpoint Interrupt Enables
Pending Interrupt Vector Read/Clear
Lower Eight Bits of Free-running Timer (1 MHz)
Upper Four Bits of Free-running Timer
Watchdog Reset Clear
Timer (LSB)
R
Timer (MSB)
R
WDR Clear
W
I2C Control & Status
I2C Data
R/W
R/W
I2C Status and Control
I2C Data
Document #: 38-08002 Rev. *B
Page 10 of 51
CY7C65013
CY7C65113
Table 4-2. I/O Register Summary (continued)
Register Name I/O Address Read/Write
Reserved
Function
Page
0x30
0x31
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
0x32
Reserved
0x38-0x3F
0x40
USB Device Address B
EP B0 Counter Register
EP B0 Mode Register
R/W
R/W
R/W
USB Device Address B (not used in 5-endpoint mode) 36
0x41
USB Address B, Endpoint 0 Counter
38
37
0x42
USB Address B, Endpoint 0 Configuration, or
USB Address A, Endpoint 3 in 5-endpoint mode
EP B1 Counter Register
EP B1 Mode Register
0x43
0x44
R/W
R/W
USB Address B, Endpoint 1 Counter
38
38
USB Address B, Endpoint 1 Configuration, or
USB Address A, Endpoint 4 in 5-endpoint mode
Hub Port Connect Status
Hub Port Enable
0x48
0x49
0x4A
0x4B
0x4C
0x4D
0x4E
0x4F
0x50
0x51
0x52
0xFF
R/W
R/W
R/W
R/W
R/W
R/W
R
Hub Downstream Port Connect Status
Hub Downstream Ports Enable
31
32
31
33
33
34
35
33
34
33
33
24
Hub Port Speed
Hub Downstream Ports Speed
Hub Port Control (Ports [4:1])
Hub Port Control (Ports [7:5])
Hub Port Suspend
Hub Downstream Ports Control (Ports [4:1])
Hub Downstream Ports Control (Ports [7:5])
Hub Downstream Port Suspend Control
Hub Downstream Ports Resume Status
Hub Downstream Ports SE0 Status
Hub Port Resume Status
Hub Ports SE0 Status
Hub Ports Data
R
R
Hub Downstream Ports Differential Data
Hub Downstream Ports Force LOW (Ports [1:4])
Hub Downstream Ports Force HIGH (Ports [5:7])
Microprocessor Status and Control Register
Hub Downstream Force Low
Hub Downstream Force High
Processor Status & Control
R/W
R/W
R/W
4.3
Instruction Set Summary
Refer to the CYASM Assembler User’s Guide for more details. Note that conditional jump instructions (i.e. JC, JNC, JZ, JNZ)
take five cycles if jump is taken, four cycles if no jump.
Table 4-3. Instruction Set Summary
MNEMONIC
HALT
operand
opcode
00
cycles
MNEMONIC
NOP
operand
acc
opcode
20
cycles
7
4
6
7
4
6
7
4
6
7
4
6
7
4
4
4
4
7
8
4
4
7
8
5
5
4
4
5
ADD A,expr
data
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
INC A
21
22
23
24
25
26
27
28
29
2A
2B
2C
2D
ADD A,[expr]
ADD A,[X+expr]
ADC A,expr
direct
index
data
INC X
x
INC [expr]
INC [X+expr]
DEC A
direct
index
acc
ADC A,[expr]
ADC A,[X+expr]
SUB A,expr
direct
index
data
DEC X
x
DEC [expr]
DEC [X+expr]
IORD expr
IOWR expr
POP A
direct
index
address
address
SUB A,[expr]
SUB A,[X+expr]
SBB A,expr
direct
index
data
SBB A,[expr]
SBB A,[X+expr]
OR A,expr
direct
index
data
POP X
PUSH A
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CY7C65013
CY7C65113
Table 4-3. Instruction Set Summary (continued)
MNEMONIC operand opcode cycles
OR A,[expr] direct 0E
MNEMONIC
PUSH X
operand
opcode
cycles
6
7
4
6
7
4
6
7
5
7
8
4
5
6
4
5
2E
5
5
5
5
6
7
8
7
8
7
8
6
4
4
4
4
4
8
4
4
8
OR A,[X+expr]
AND A,expr
AND A,[expr]
AND A,[X+expr]
XOR A,expr
XOR A,[expr]
XOR A,[X+expr]
CMP A,expr
CMP A,[expr]
CMP A,[X+expr]
MOV A,expr
MOV A,[expr]
MOV A,[X+expr]
MOV X,expr
MOV X,[expr]
reserved
index
data
0F
SWAP A,X
SWAP A,DSP
MOV [expr],A
MOV [X+expr],A
OR [expr],A
OR [X+expr],A
AND [expr],A
AND [X+expr],A
XOR [expr],A
XOR [X+expr],A
IOWX [X+expr]
CPL
2F
10
30
direct
index
data
11
direct
31
12
index
direct
index
direct
index
direct
index
index
32
13
33
direct
index
data
14
34
15
35
16
36
direct
index
data
17
37
18
38
19
39
direct
index
data
1A
3A
1B
ASL
3B
1C
ASR
3C
direct
1D
RLC
3D
1E
RRC
3E
XPAGE
1F
4
4
4
4
RET
3F
MOV A,X
40
DI
70
MOV X,A
41
EI
72
MOV PSP,A
CALL
60
RETI
73
addr
addr
addr
addr
addr
50-5F
80-8F
90-9F
A0-AF
B0-BF
10
JC
addr
addr
addr
addr
C0-CF
D0-DF
E0-EF
F0-FF
5 (or 4)
5 (or 4)
7
JMP
5
JNC
CALL
10
JACC
JZ
5 (or 4)
5 (or 4)
INDEX
14
JNZ
5.0
5.1
Programming Model
14-bit Program Counter
The 14-bit Program Counter (PC) allows access to up to 8 KB of PROM available with the CY7C65x13 architecture. The top
32 bytes of the ROM in the 8K part are reserved for testing purposes. The program counter is cleared during reset, such that the
first instruction executed after a reset is at address 0x0000h. Typically, this is a jump instruction to a reset handler that initializes
the application (see Interrupt Vectors on page 27).
The lower eight bits of the program counter are incremented as instructions are loaded and executed. The upper six bits of the
program counter are incremented by executing an XPAGE instruction. As a result, the last instruction executed within a 256-byte
“page” of sequential code should be an XPAGE instruction. The assembler directive “XPAGEON” causes the assembler to insert
XPAGE instructions automatically. Because instructions can be either one or two bytes long, the assembler may occasionally
need to insert a NOP followed by an XPAGE to execute correctly.
The address of the next instruction to be executed, the carry flag, and the zero flag are saved as two bytes on the program stack
during an interrupt acknowledge or a CALL instruction. The program counter, carry flag, and zero flag are restored from the
program stack during a RETI instruction. Only the program counter is restored during a RET instruction.
The program counter cannot be accessed directly by the firmware. The program stack can be examined by reading SRAM from
location 0x00 and up.
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5.1.1
Program Memory Organization
after reset
14-bit PC
Address
0x0000
Program execution begins here after a reset
USB Bus Reset interrupt vector
128-µs timer interrupt vector
0x0002
0x0004
0x0006
0x0008
0x000A
0x000C
0x000E
0x0010
0x0012
0x0014
0x0016
0x0018
0x001A
1.024-ms timer interrupt vector
USB address A endpoint 0 interrupt vector
USB address A endpoint 1 interrupt vector
USB address A endpoint 2 interrupt vector
USB address B endpoint 0 interrupt vector
USB address B endpoint 1 interrupt vector
Hub interrupt vector
Reserved
GPIO interrupt vector
I2C interrupt vector
Program Memory begins here
0x1FDF
(8 KB -32) PROM ends here (CY7C65013, CY7C65113)
Figure 5-1. Program Memory Space with Interrupt Vector Table
Note that the upper 32 bytes of the 8K PROM are reserved. Therefore, user’s program must not overwrite this space.
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5.2
8-bit Accumulator (A)
The accumulator is the general-purpose register for the microcontroller.
5.3
8-bit Temporary Register (X)
The “X” register is available to the firmware for temporary storage of intermediate results. The microcontroller can perform indexed
operations based on the value in X. Refer to Section 5.6.3 for additional information.
5.4
8-bit Program Stack Pointer (PSP)
During a reset, the Program Stack Pointer (PSP) is set to 0x00 and “grows” upward from this address. The PSP may be set by
firmware, using the MOV PSP,A instruction. The PSP supports interrupt service under hardware control and CALL, RET, and
RETI instructions under firmware control. The PSP is not readable by the firmware.
During an interrupt acknowledge, interrupts are disabled and the 14-bit program counter, carry flag, and zero flag are written as
two bytes of data memory. The first byte is stored in the memory addressed by the PSP, then the PSP is incremented. The second
byte is stored in memory addressed by the PSP, and the PSP is incremented again. The overall effect is to store the program
counter and flags on the program “stack” and increment the PSP by two.
The Return From Interrupt (RETI) instruction decrements the PSP, then restores the second byte from memory addressed by the
PSP. The PSP is decremented again and the first byte is restored from memory addressed by the PSP. After the program counter
and flags have been restored from stack, the interrupts are enabled. The overall effect is to restore the program counter and flags
from the program stack, decrement the PSP by two, and re-enable interrupts.
The Call Subroutine (CALL) instruction stores the program counter and flags on the program stack and increments the PSP by
two.
The Return From Subroutine (RET) instruction restores the program counter but not the flags from the program stack and
decrements the PSP by two.
5.4.1
Data Memory Organization
The CY7C65x13 microcontrollers provide 256 bytes of data RAM. Normally, the SRAM is partitioned into four areas: program
stack, user variables, data stack, and USB endpoint FIFOs. The following is one example of where the program stack, data stack,
and user variables areas could be located.
After reset
8-bit DSP 8-bit PSP
Address
0x00
Program Stack Growth
(Move DSP[1]
)
user selected
Data Stack Growth
8-bit DSP
User variables
USB FIFO space for up to two Addresses and five endpoints[2]
0xFF
Notes:
1. Refer to Section 5.5 for a description of DSP.
2. Endpoint sizes are fixed by the Endpoint Size Bit (I/O register 0x1F, Bit 7). See Table 17-1.
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5.5
8-bit Data Stack Pointer (DSP)
The Data Stack Pointer (DSP) supports PUSH and POP instructions that use the data stack for temporary storage. A PUSH
instruction pre-decrements the DSP, then writes data to the memory location addressed by the DSP. A POP instruction reads
data from the memory location addressed by the DSP, then post-increments the DSP.
During a reset, the DSP is reset to 0x00. A PUSH instruction when DSP equals 0x00 writes data at the top of the data RAM
(address 0xFF). This writes data to the memory area reserved for USB endpoint FIFOs. Therefore, the DSP should be indexed
at an appropriate memory location that does not compromise the Program Stack, user-defined memory (variables), or the USB
endpoint FIFOs.
For USB applications, the firmware should set the DSP to an appropriate location to avoid a memory conflict with RAM dedicated
to USB FIFOs. The memory requirements for the USB endpoints are described in Section 17.2. Example assembly instructions
to do this with two device addresses (FIFOs begin at 0xD8) are shown below:
MOV A,20h
; Move 20 hex into Accumulator (must be D8h or less)
SWAP A,DSP ; swap accumulator value into DSP register.
5.6
Address Modes
The CY7C65013 and CY7C65113 microcontrollers support three addressing modes for instructions that require data operands::
data, direct, and indexed.
5.6.1
Data (Immediate)
“Data” address mode refers to a data operand that is actually a constant encoded in the instruction. As an example, consider the
instruction that loads A with the constant 0xD8:
• MOV A, 0D8h.
This instruction requires two bytes of code where the first byte identifies the “MOV A” instruction with a data operand as the
second byte. The second byte of the instruction is the constant “0xD8.” A constant may be referred to by name if a prior “EQU”
statement assigns the constant value to the name. For example, the following code is equivalent to the example shown above:
• DSPINIT: EQU 0D8h
• MOV A, DSPINIT.
5.6.2
Direct
“Direct” address mode is used when the data operand is a variable stored in SRAM. In that case, the one byte address of the
variable is encoded in the instruction. As an example, consider an instruction that loads A with the contents of memory address
location 0x10:
• MOV A, [10h].
Normally, variable names are assigned to variable addresses using “EQU” statements to improve the readability of the assembler
source code. As an example, the following code is equivalent to the example shown above:
• buttons: EQU 10h
• MOV A, [buttons].
5.6.3
Indexed
“Indexed” address mode allows the firmware to manipulate arrays of data stored in SRAM. The address of the data operand is
the sum of a constant encoded in the instruction and the contents of the “X” register. Normally, the constant is the “base” address
of an array of data and the X register contains an index that indicates which element of the array is actually addressed:
• array: EQU 10h
• MOV X, 3
• MOV A, [X+array].
This would have the effect of loading A with the fourth element of the SRAM “array” that begins at address 0x10. The fourth
element would be at address 0x13.
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6.0
Clocking
XTALOUT
(pin 1)
XTALIN
(pin 2)
To Internal PLL
30 pF
30 pF
Figure 6-1. Clock Oscillator On-Chip Circuit
The XTALIN and XTALOUT are the clock pins to the microcontroller. The user can connect an external oscillator or a crystal to
these pins. When using an external crystal, keep PCB traces between the chip leads and crystal as short as possible (less than
2 cm). A 6-MHz fundamental frequency parallel resonant crystal can be connected to these pins to provide a reference frequency
for the internal PLL. The two internal 30-pF load caps appear in series to the external crystal and would be equivalent to a 15-pF
load. Therefore, the crystal must have a required load capacitance of about 15–18 pF. A ceramic resonator does not allow the
microcontroller to meet the timing specifications of full speed USB and therefore a ceramic resonator is not recommended with
these parts.
An external 6-MHz clock can be applied to the XTALIN pin if the XTALOUT pin is left open. Grounding the XTALOUT pin when
driving XTALIN with an oscillator does not work because the internal clock is effectively shorted to ground.
7.0
Reset
The CY7C65x13 supports two resets: POR and WDR. Each of these resets causes:
• all registers to be restored to their default states
• the USB device addresses to be set to 0
• all interrupts to be disabled
• the PSP and DSP to be set to memory address 0x00.
The occurrence of a reset is recorded in the Processor Status and Control Register, as described in Section. Bits 4 and 6 are
used to record the occurrence of POR and WDR respectively. Firmware can interrogate these bits to determine the cause of a
reset.
Program execution starts at ROM address 0x0000 after a reset. Although this looks like interrupt vector 0, there is an important
difference. Reset processing does NOT push the program counter, carry flag, and zero flag onto program stack. The firmware
reset handler should configure the hardware before the “main” loop of code. Attempting to execute a RET or RETI in the firmware
reset handler causes unpredictable execution results.
7.1
Power-on Reset
When VCC is first applied to the chip, the POR signal is asserted and the CY7C65x13 enters a “semi-suspend” state. During the
semi-suspend state, which is different from the suspend state defined in the USB specification, the oscillator and all other blocks
of the part are functional, except for the CPU. This semi-suspend time ensures that both a valid VCC level is reached and that
the internal PLL has time to stabilize before full operation begins. When the VCC has risen above approximately 2.5V, and the
oscillator is stable, the POR is deasserted and the on-chip timer starts counting. The first 1 ms of suspend time is not interruptible,
and the semi-suspend state continues for an additional 95 ms unless the count is bypassed by a USB Bus Reset on the upstream
port. The 95 ms provides time for VCC to stabilize at a valid operating voltage before the chip executes code.
If a USB Bus Reset occurs on the upstream port during the 95 ms semi-suspend time, the semi-suspend state is aborted and
program execution begins immediately from address 0x0000. In this case, the Bus Reset interrupt is pending but not serviced
until firmware sets the USB Bus Reset Interrupt Enable bit (Bit 0, Figure 14-1) and enables interrupts with the EI command.
The POR signal is asserted whenever VCC drops below approximately 2.5V, and remains asserted until VCC rises above this level
again. Behavior is the same as described above.
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7.2
Watchdog Reset
The WDR occurs when the internal Watchdog Timer rolls over. Writing any value to the write-only Watchdog Reset Clear Register
(Figure 7-1) clears the timer. The timer rolls over and WDR occurs if it is not cleared within tWATCH of the last clear (see Section
23.0 for the value of tWATCH). Bit 6 of the Processor Status and Control Register (Figure 13-1) is set to record this event (the
register contents are set to 010X0001 by the WDR). A Watchdog Timer Reset lasts for 2 ms, after which the microcontroller begins
execution at ROM address 0x0000.
2 ms
tWATCH
Last write to
Watchdog Timer
Register
No write to WDT
register, so WDR
goes HIGH
Execution begins at
Reset Vector 0x0000
Figure 7-1. Watchdog Reset (Address 0x26)
The USB transmitter is disabled by a Watchdog Reset because the USB Device Address Registers are cleared (see Section
17.1). Otherwise, the USB Controller would respond to all address 0 transactions.
It is possible for the WDR bit of the Processor Status and Control Register (Figure 13-1) to be set following a POR event. If a
firmware interrogates the Processor Status and Control Register for a set condition on the WDR bit, the WDR bit should be ignored
if the POR bit is set (Bit 3 of the Processor Status and Control Register).
8.0
Suspend Mode
The CY7C65x13 can be placed into a low-power state by setting the Suspend bit of the Processor Status and Control register.
All logic blocks in the device are turned off except the GPIO interrupt logic and the USB receiver. The clock oscillator and PLL,
as well as the free-running and Watchdog timers, are shut down. Only the occurrence of an enabled GPIO interrupt or non-idle
bus activity at a USB upstream or downstream port wakes the part out of suspend. The Run bit in the Processor Status and
Control Register must be set to resume a part out of suspend.
The clock oscillator restarts immediately after exiting suspend mode. The microcontroller returns to a fully functional state 1 ms
after the oscillator is stable. The microcontroller executes the instruction following the I/O write that placed the device into suspend
mode before servicing any interrupt requests.
The GPIO interrupt allows the controller to wake-up periodically and poll system components while maintaining a very low average
power consumption. To achieve the lowest possible current during suspend mode, all I/O should be held at VCC or Gnd. Note:
This also applies to internal port pins that may not be bonded in a particular package.
Typical code for entering suspend is shown below:
...
...
; All GPIO set to low-power state (no floating pins)
; Enable GPIO interrupts if desired for wake-up
; Set suspend and run bits
; Write to Status and Control Register – Enter suspend, wait for USB activity (or GPIO Interrupt)
; This executes before any ISR
mov a, 09h
iowr FFh
nop
...
; Remaining code for exiting suspend routine.
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9.0
General-purpose I/O Ports
VCC
GPIO
CFG
mode
2-bits
OE
Q2
Q1
Data
Out
Latch
Internal
Data Bus
14 kΩ
GPIO
PIN
Port Write
Port Read
Q3*
Data
In
Latch
Reg_Bit
STRB
(Latch is Transparent)
Data
Interrupt
Latch
Interrupt
Enable
Interrupt
Controller
*Port 0,1,2: Low Isink
Port 3: High Isink
Figure 9-1. Block Diagram of a GPIO Pin
There are up to 32 GPIO pins (P0[7:0], P1[7:4,2:0], P2[7:3], and P3[1:0]) for the hardware interface. The number of GPIO pins
depends on package type. See Section 3.0 for the port pins availability on different package types. Each port can be configured
as inputs with internal pull-ups, open drain outputs, or traditional CMOS outputs. Port 3 offers a higher current drive, with typical
current sink capability of 12 mA. The data for each GPIO port is accessible through the data registers. Port data registers are
shown in Figure 9-2 through Figure 9-5, and are set to 1 on reset
.
Port 0 Data
Address 0x00
Bit #
7
6
5
4
3
2
1
0
Bit Name
Read/Write
Reset
P0.7
R/W
1
P0.6
R/W
1
P0.5
R/W
1
P0.4
R/W
1
P0.3
R/W
1
P0.2
R/W
1
P0.1
R/W
1
P0.0
R/W
1
Figure 9-2. Port 0 Data
Port 1 Data
Bit #
Address 0x01
7
6
5
4
3
2
1
0
Bit Name
Read/Write
Reset
P1.7
R/W
1
P1.6
R/W
1
P1.5
R/W
1
P1.4
R/W
1
Reserved
P1.2
R/W
1
P1.1
R/W
1
P1.0
R/W
1
R/W
1
Figure 9-3. Port1 Data
Port 2 Data
Bit #
Address 0x02
7
6
5
4
3
2
Reserved
R/W
1
Reserved
R/W
0
Reserved
R/W
Bit Name
Read/Write
Reset
P2.7
R/W
1
P2.6
R/W
1
P2.5
R/W
1
P2.4
R/W
1
P2.3
R/W
1
1
1
1
Figure 9-4. Port 2 Data
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Port 3 Data
Bit #
Address 0x03
7
Reserved
R/W
6
Reserved
R/W
5
Reserved
R/W
4
Reserved
R/W
3
Reserved
R/W
2
Reserved
R/W
1
0
Bit Name
Read/Write
Reset
P3.1
R/W
1
P3.0
R/W
1
1
1
1
1
1
1
Figure 9-5. Port 3 Data
Special care should be taken with any unused GPIO data bits. An unused GPIO data bit, either a pin on the chip or a port bit that
is not bonded on a particular package, must not be left floating when the device enters the suspend state. If a GPIO data bit is
left floating, the leakage current caused by the floating bit may violate the suspend current limitation specified by the USB
Specifications. If a ‘1’ is written to the unused data bit and the port is configured with open drain outputs, the unused data bit
remains in an indeterminate state. Therefore, if an unused port bit is programmed in open-drain mode, it must be written with a
‘0.’ Notice that the CY7C65113 always requires that P1[7:3], P2[7:0], and P3[7:0] be written with a ‘0.’ When the CY7C65013 is
used, the P1[3], P2[2:0], and P3[7:2] should be written with a ‘0.’
A read from a GPIO port always returns the present state of the voltage at the pin, independent of the settings in the Port Data
Registers. During reset, all of the GPIO pins are set to a high-impedance input state. Writing a ‘0’ to a GPIO pin drives the pin
LOW. In this state, a ‘0’ is always read on that GPIO pin unless an external source overdrives the internal pull-down device.
9.1
GPIO Configuration Port
Every GPIO port can be programmed as inputs with internal pull-ups, outputs LOW or HIGH, or Hi-Z (floating, the pin is not driven
internally). In addition, the interrupt polarity for each port can be programmed. The Port Configuration bits (Figure 9-6) and the
Interrupt Enable bit (Figure 9-7 through Figure 9-10) determine the interrupt polarity of the port pins
.
GPIO Configuration
Address 0x08
Bit #
7
6
5
4
3
2
1
0
Bit Name
Port 3
Port 3
Port 2
Port 2
Port 1
Port 1
Port 0
Port 0
Config Bit 1 Config Bit 0 Config Bit 1 Config Bit 0 Config Bit 1 Config Bit 0 Config Bit 1 Config Bit 0
Read/Write
Reset
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 9-6. GPIO Configuration Register
As shown in Table 9-1 below, a positive polarity on an input pin represents a rising edge interrupt (LOW to HIGH), and a negative
polarity on an input pin represents a falling edge interrupt (HIGH to LOW).
The GPIO interrupt is generated when all of the following conditions are met: the Interrupt Enable bit of the associated Port
Interrupt Enable Register is enabled, the GPIO Interrupt Enable bit of the Global Interrupt Enable Register (Figure 14-1) is
enabled, the Interrupt Enable Sense (bit 2, Figure 13-1) is set, and the GPIO pin of the port sees an event matching the interrupt
polarity.
The driving state of each GPIO pin is determined by the value written to the pin’s Data Register (Figure 9-2 through Figure 9-5)
and by its associated Port Configuration bits as shown in the GPIO Configuration Register (Figure 9-6). These ports are
configured on a per-port basis, so all pins in a given port are configured together. The possible port configurations are detailed
in Table 9-1. As shown in this table below, when a GPIO port is configured with CMOS outputs, interrupts from that port are
disabled.
During reset, all of the bits in the GPIO Configuration Register are written with ‘0’ to select Hi-Z mode for all GPIO ports as the
default configuration.
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Table 9-1. GPIO Port Output Control Truth Table and Interrupt Polarity
Port Config Bit 1 Port Config Bit 0 Data Register Output Drive Strength Interrupt Enable Bit
Interrupt Polarity
Disabled
1
1
0
0
1
0
1
0
0
1
0
1
0
1
0
1
Output LOW
Resistive
0
1
0
1
0
1
0
1
– (Falling Edge)
Disabled
Output LOW
Output HIGH
Output LOW
Hi-Z
Disabled
Disabled
– (Falling Edge)
Disabled
Output LOW
Hi-Z
+ (Rising Edge)
Q1, Q2, and Q3 discussed below are the transistors referenced in Figure 9-2. The available GPIO drive strength are:
• Output LOW Mode: The pin’s Data Register is set to ‘0.’
Writing ‘0’ to the pin’s Data Register puts the pin in output LOW mode, regardless of the contents of the Port Configuration
Bits[1:0]. In this mode, Q1 and Q2 are OFF. Q3 is ON. The GPIO pin is driven LOW through Q3.
• Output HIGH Mode: The pin’s Data Register is set to 1 and the Port Configuration Bits[1:0] is set to ‘10.’
In this mode, Q1 and Q3 are OFF. Q2 is ON. The GPIO is pulled up through Q2. The GPIO pin is capable of sourcing... of
current.
• Resistive Mode: The pin’s Data Register is set to 1 and the Port Configuration Bits[1:0] is set to ‘11.’
Q2 and Q3 are OFF. Q1 is ON. The GPIO pin is pulled up with an internal 14kΩ resistor. In resistive mode, the pin may serve
as an input. Reading the pin’s Data Register returns a logic HIGH if the pin is not driven LOW by an external source.
• Hi-Z Mode: The pin’s Data Register is set to1 and Port Configuration Bits[1:0] is set either ‘00’ or ‘01.’
Q1, Q2, and Q3 are all OFF. The GPIO pin is not driven internally. In this mode, the pin may serve as an input. Reading the
Port Data Register returns the actual logic value on the port pins.
9.2
GPIO Interrupt Enable Ports
Each GPIO pin can be individually enabled or disabled as an interrupt source. The Port 0–3 Interrupt Enable Registers provide
this feature with an Interrupt Enable bit for each GPIO pin.
During a reset, GPIO interrupts are disabled by clearing all of the GPIO Interrupt Enable bits. Writing a ‘1’ to a GPIO Interrupt
Enable bit enables GPIO interrupts from the corresponding input pin. All GPIO pins share a common interrupt, as discussed in
Section 14.7
.
Port 0 Interrupt Enable
Address 0x04
Bit #
7
6
5
4
3
2
1
0
Bit Name
P0.7 Intr
Enable
P0.6 Intr
Enable
P0.5 Intr
Enable
P0.4 Intr
Enable
P0.3 Intr
Enable
P0.2 Intr
Enable
P0.1 Intr
Enable
P0.0 Intr
Enable
Read/Write
Reset
W
0
W
0
W
0
W
0
W
0
W
0
W
0
W
0
Figure 9-7. Port 0 Interrupt Enable
Port 1 Interrupt Enable
Address 0x05
Bit #
7
6
5
4
3
2
1
0
Bit Name
P1.7 Intr
Enable
P1.6 Intr
Enable
P1.5 Intr
Enable
P1.4 Intr
Enable
Reserved
P0.2 Intr
Enable
P1.1 Intr
Enable
P1.0 Intr
Enable
Read/Write
Reset
W
0
W
0
W
0
W
0
W
0
W
0
W
0
W
0
Figure 9-8. Port 1 Interrupt Enable
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Port 2 Interrupt Enable
Address 0x06
Bit #
7
6
5
4
3
2
1
0
Bit Name
P0.7 Intr
Enable
P0.6 Intr
Enable
P0.5 Intr
Enable
P0.4 Intr
Enable
P0.3 Intr
Enable
Reserved
Reserved
Reserved
Read/Write
Reset
W
0
W
0
W
0
W
0
W
0
W
0
W
0
W
0
Figure 9-9. Port 2 Interrupt Enable
Port 3 Interrupt Enable
Address 0x07
Bit #
7
6
5
4
3
2
1
0
Bit Name
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
P3.1 Intr
Enable
P0.3 Intr
Enable
Read/Write
Reset
W
0
W
0
W
0
W
0
W
0
W
0
W
0
W
0
Figure 9-10. Port 3 Interrupt Enable
10.0
12-bit Free-Running Timer
The 12-bit timer operates with a 1-µs tick, provides two interrupts (128µs and 1.024ms) and allows the firmware to directly time
events that are up to 4 ms in duration. The lower eight bits of the timer can be read directly by the firmware. Reading the lower
eight bits latches the upper four bits into a temporary register. When the firmware reads the upper four bits of the timer, it is actually
reading the count stored in the temporary register. The effect of this is to ensure a stable 12-bit timer value can be read, even
when the two reads are separated in time.
Timer LSB
Address 0x24
Bit #
7
6
5
4
3
2
1
0
Bit Name
Read/Write
Reset
Timer Bit 7
TimerBit 6
Timer Bit 5 Timer Bit 4 Timer Bit 3 Timer Bit 2 Timer Bit 1 Timer Bit 0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
Figure 10-1. Timer LSB Register
Bit [7:0]: Timer lower eight bits.
Timer MSB
Address 0x25
Bit #
7
6
5
4
3
2
1
0
Bit Name
Read/Write
Reset
Reserved
Reserved
Reserved
Reserved Timer Bit 11 Timer Bit 10 Timer Bit 9 Timer Bit 8
–
0
–
0
–
0
–
0
R
0
R
0
R
0
R
0
Figure 10-2. Timer MSB Register
Bit [3:0]: Timer higher nibble
Bit [7:4]: Reserved.
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1.024-ms interrupt
128- s interrupt
µ
1 MHz clock
11 10 9
8
7
6
5
4
3
2
1
0
L3 L2 L1 L0
D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0
To Timer Registers
8
Figure 10-3. Timer Block Diagram
2
11.0
I C Configuration Register
Internal hardware supports communication with external devices through an I2C-compatible interface. I2C-compatible function is
discussed in detail in Section 12.0.[3] The I2C Position bit (Bit 7, Figure 11-1) and I2C Port Width bit (Bit 1, Figure 11-1) select the
locations of the SCL (clock) and SDA (data) pins, either on Port 1 or Port 2 as shown in Table 11-1. These bits are cleared on
reset. When the GPIO is configured for I2C function, the internal pull ups on the pins are disabled. Addition of an external weak
pull-up resistors on SCL and SDA is recommended
.
I2C Configuration
Address 0x09
0
Bit #
7
6
5
4
3
2
1
Bit Name
I2C Position Reserved
Reserved
Reserved
Reserved
Reserved
I2C Port
Width
Reserved
Read/Write
Reset
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 11-1. I2C Configuration Register
Table 11-1. I2C Port Configuration
I2C Position (Bit7, Figure 11-1)
I2C Port Width (Bit1, Figure 11-1)
I2C Position
Don’t Care
1
0
0
I2C on P2[1:0], 0:SCL, 1:SDA
I2C on P1[1:0], 0:SCL, 1:SDA
I2C on P2[1:0], 0:SCL, 1:SDA
0
1
12.0
I2C-compatible Controller
The I2C-compatible block provides a versatile two-wire communication with external devices, supporting master, slave, and
multi-master modes of operation. The I2C-compatible block functions by handling the low-level signaling in hardware, and issuing
interrupts as needed to allow firmware to take appropriate action during transactions. While waiting for firmware response, the
hardware keeps the I2C-compatible bus idle if necessary.
The I2C-compatible block generates an interrupt to the microcontroller at the end of each received or transmitted byte, when a
stop bit is detected by the slave when in receive mode, or when arbitration is lost. Details of the interrupt responses are given in
Section 14.8.
The I2C-compatible interface consists of two registers, an I2C Data Register (Figure 12-1) and an I2C Status and Control Register
(Figure 12-2). The I2C Data Register is implemented as separate read and write registers. Generally, the I2C Status and Control
Register should only be monitored after the I2C interrupt, as all bits are valid at that time. Polling this register at other times could
read misleading bit status if a transaction is underway.
Note:
3. I2C-compatible function must be separately enabled, as described in Section 12.0.
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The I2C clock (SCL) is connected to bit 0 of either GPIO port 1 or GPIO port 2, and the I2C SDA data is connected to bit 1 of
either GPIO port 1 or GPIO port 2. The port selection is determined by settings in the I2C Port Configuration Register (Section
11.0). Once the I2C-compatible functionality is enabled by setting the I2C Enable bit of the I2C Status and Control Register (bit 0,
Figure 12-2), the two LSB ([1:0]) of the corresponding GPIO port is placed in Open Drain mode, regardless of the settings of the
GPIO Configuration Register. In Open Drain mode, the GPIO pin outputs LOW if the pin’s Data Register is ‘0’, and the pin is in
Hi-Z mode if the pin’s Data Register is ‘1’. The electrical characteristics of the I2C-compatible interface is the same as that of
GPIO ports 1 and 2. Note that the IOL (max) is 2 mA @ VOL = 2.0V for ports 1 and 2.
All control of the I2C clock (SCL) and data (SDA) lines is performed by the I2C-compatible block.
I2C Data
Bit #
Address 0x29
7
I2C Data 7
R/W
6
I2C Data 6
R/W
5
I2C Data 5
R/W
4
I2C Data 4
R/W
3
I2C Data 3
R/W
2
I2C Data 2
R/W
1
I2C Data 1
R/W
0
I2C Data 0
R/W
Bit Name
Read/Write
Reset
X
X
X
X
X
X
X
X
Figure 12-1. I2C Data Register
Bits [7..0] : I2C Data
Contains the 8-bit data on the I2C Bus.
I2C Status and Control
Address 0x28
0
Bit #
7
6
5
4
3
2
1
Bit Name
MSTR Mode Continue/Bu Xmit Mode
sy
ACK
Addr
ARB
Lost/Restart
Received
Stop
I2C Enable
Read/Write
Reset
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 12-2. I2C Status and Control Register
The I2C Status and Control register bits are defined in Table 12-1, with a more detailed description following.
Table 12-1. I2C Status and Control Register Bit Definitions
Bit
Name
Description
0
I2C Enable
When set to ‘1’, the I2C-compatible function is enabled. When cleared, I2C GPIO pins operate
normally.
1
2
3
4
Received Stop
Reads 1 only in slave receive mode, when I2C Stop bit detected (unless firmware did not ACK the
last transaction).
ARB Lost/Restart Reads 1 to indicate master has lost arbitration. Reads 0 otherwise.
Write to 1 in master mode to perform a restart sequence (also set Continue bit).
Addr
Reads 1 during first byte after start/restart in slave mode, or if master loses arbitration.
Reads 0 otherwise. This bit should always be written as 0.
ACK
In receive mode, write 1 to generate ACK, 0 for no ACK.
In transmit mode, reads 1 if ACK was received, 0 if no ACK received.
5
6
Xmit Mode
Write to 1 for transmit mode, 0 for receive mode.
Continue/Busy
Write 1 to indicate ready for next transaction.
Reads 1 when I2C-compatible block is busy with a transaction, 0 when transaction is complete.
7
MSTR Mode
Write to 1 for master mode, 0 for slave mode. This bit is cleared if master loses arbitration.
Clearing from 1 to 0 generates Stop bit.
Bit 7 : MSTR Mode
Setting this bit to 1 causes the I2C-compatible block to initiate a master mode transaction by sending a start bit and
transmitting the first data byte from the data register (this typically holds the target address and R/W bit). Subsequent bytes
are initiated by setting the Continue bit, as described below.
Clearing this bit (set to 0) causes the GPIO pins to operate normally.
In master mode, the I2C-compatible block generates the clock (SCK), and drives the data line as required depending on
transmit or receive state. The I2C-compatible block performs any required arbitration and clock synchronization. IN the
event of a loss of arbitration, this MSTR bit is cleared, the ARB Lost bit is set, and an interrupt is generated by the
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microcontroller. If the chip is the target of an external master that wins arbitration, then the interrupt is held off until the
transaction from the external master is completed.
When MSTR Mode is cleared from 1 to 0 by a firmware write, an I2C Stop bit is generated.
Bit 6 : Continue/Busy
This bit is written by the firmware to indicate that the firmware is ready for the next byte transaction to begin. In other words,
the bit has responded to an interrupt request and has completed the required update or read of the data register. During a
read this bit indicates if the hardware is busy and is locking out additional writes to the I2C Status and Control register. This
locking allows the hardware to complete certain operations that may require an extended period of time. Following an I2C
interrupt, the I2C-compatible block does not return to the Busy state until firmware sets the Continue bit. This allows the
firmware to make one control register write without the need to check the Busy bit.
Bit 5 : Xmit Mode
This bit is set by firmware to enter transmit mode and perform a data transmit in master or slave mode. Clearing this bit
sets the part in receive mode. Firmware generally determines the value of this bit from the R/W bit associated with the I2C
address packet. The Xmit Mode bit state is ignored when initially writing the MSTR Mode or the Restart bits, as these cases
always cause transmit mode for the first byte.
Bit 4 : ACK
This bit is set or cleared by firmware during receive operation to indicate if the hardware should generate an ACK signal
on the I2C-compatible bus. Writing a 1 to this bit generates an ACK (SDA LOW) on the I2C-compatible bus at the ACK bit
time. During transmits (Xmit Mode = 1), this bit should be cleared.
Bit 3 : Addr
This bit is set by the I2C-compatible block during the first byte of a slave receive transaction, after an I2C start or restart.
The Addr bit is cleared when the firmware sets the Continue bit. This bit allows the firmware to recognize when the master
has lost arbitration, and in slave mode it allows the firmware to recognize that a start or restart has occurred.
Bit 2 : ARB Lost/Restart
This bit is valid as a status bit (ARB Lost) after master mode transactions. In master mode, set this bit (along with the
Continue and MSTR Mode bits) to perform an I2C restart sequence. The I2C target address for the restart must be written
to the data register before setting the Continue bit. To prevent false ARB Lost signals, the Restart bit is cleared by hardware
during the restart sequence.
Bit 1 : Receive Stop
This bit is set when the slave is in receive mode and detects a stop bit on the bus. The Receive Stop bit is not set if the
firmware terminates the I2C transaction by not acknowledging the previous byte transmitted on the I2C-compatible bus,
e.g., in receive mode if firmware sets the Continue bit and clears the ACK bit.
Bit 0 : I2C Enable
Set this bit to override GPIO definition with I2C-compatible function on the two I2C-compatible pins. When this bit is cleared,
these pins are free to function as GPIOs. In I2C-compatible mode, the two pins operate in open drain mode, independent
of the GPIO configuration setting.
13.0
Processor Status and Control Register
Processor Status and Control
Address 0xFF
Bit #
7
6
5
4
3
2
1
0
Bit Name
IRQ
Pending
Watchdog
Reset
USB Bus
Reset
Interrupt
Power-on
Reset
Suspend
Interrupt
Enable
Sense
Reserved
Run
Read/Write
Reset
R
0
R/W
0
R/W
0
R/W
1
R/W
0
R
0
R/W
0
R/W
1
Figure 13-1. Processor Status and Control Register
Bit 0: Run
This bit is manipulated by the HALT instruction. When Halt is executed, all the bits of the Processor Status and Control
Register are cleared to 0. Since the run bit is cleared, the processor stops at the end of the current instruction. The processor
remains halted until an appropriate reset occurs (power-on or Watchdog). This bit should normally be written as a ‘1.’
Bit 1: Reserved
Bit 1 is reserved and must be written as a zero.
Bit 2: Interrupt Enable Sense
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This bit indicates whether interrupts are enabled or disabled. Firmware has no direct control over this bit as writing a zero
or one to this bit position has no effect on interrupts. A ‘0’ indicates that interrupts are masked off and a ‘1’ indicates that
the interrupts are enabled. This bit is further gated with the bit settings of the Global Interrupt Enable Register (Figure 14-1)
and USB End Point Interrupt Enable Register (Figure 14-2). Instructions DI, EI, and RETI manipulate the state of this bit.
Bit 3: Suspend
Writing a ‘1’ to the Suspend bit halts the processor and cause the microcontroller to enter the suspend mode that signifi-
cantly reduces power consumption. A pending, enabled interrupt or USB bus activity causes the device to come out of
suspend. After coming out of suspend, the device resumes firmware execution at the instruction following the IOWR which
put the part into suspend. An IOWR attempting to put the part into suspend is ignored if USB bus activity is present. See
Section 8.0 for more details on suspend mode operation.
Bit 4: Power-on Reset
The Power-on Reset is set to ‘1’ during a power-on reset. The firmware can check bits 4 and 6 in the reset handler to
determine whether a reset was caused by a power-on condition or a Watchdog timeout. A POR event may be followed by
a Watchdog reset before firmware begins executing, as explained below.
Bit 5: USB Bus Reset Interrupt
The USB Bus Reset Interrupt bit is set when the USB Bus Reset is detected on receiving a USB Bus Reset signal on the
upstream port. The USB Bus Reset signal is a single-ended zero (SE0) that lasts from 12 to 16 µs. An SE0 is defined as
the condition in which both the D+ line and the D– line are LOW at the same time. .
Bit 6: Watchdog Reset
The Watchdog Reset is set during a reset initiated by the Watchdog Timer. This indicates the Watchdog Timer went for
more than tWATCH (8 ms minimum) between Watchdog clears. This can occur with a POR event, as noted below.
Bit 7: IRQ Pending
The IRQ pending, when set, indicates that one or more of the interrupts has been recognized as active. An interrupt remains
pending until its interrupt enable bit is set (Figure 14-1, Figure 14-2) and interrupts are globally enabled. At that point, the
internal interrupt handling sequence clears this bit until another interrupt is detected as pending.
During power-up, the Processor Status and Control Register is set to 00010001, which indicates a POR (bit 4 set) has occurred
and no interrupts are pending (bit 7 clear). During the 96-ms suspend at start-up (explained in Section 7.1), a Watchdog Reset
also occurs unless this suspend is aborted by an upstream SE0 before 8 ms. If a WDR occurs during the power-up suspend
interval, firmware reads 01010001 from the Status and Control Register after power-up. Normally, the POR bit should be cleared
so a subsequent WDR can be clearly identified. If an upstream bus reset is received before firmware examines this register, the
Bus Reset bit may also be set.
During a Watchdog Reset, the Processor Status and Control Register is set to 01XX0001, which indicates a Watchdog Reset (bit
6 set) has occurred and no interrupts are pending (bit 7 clear). The Watchdog Reset does not effect the state of the POR and the
Bus Reset Interrupt bits.
14.0
Interrupts
Interrupts are generated by GPIO pins, internal timers, I2C-compatible operation, internal USB hub and USB traffic conditions.
All interrupts are maskable by the Global Interrupt Enable Register and the USB End Point Interrupt Enable Register. Writing a
‘1’ to a bit position enables the interrupt associated with that bit position.
Global Interrupt Enable Register
Address 0X20
Bit #
7
6
5
4
3
2
1
0
Bit Name
Reserved I2C Interrupt
Enable
GPIO
Interrupt
Enable
Reserved
USB Hub
Interrupt
Enable
1.024-ms
Interrupt
Enable
128-µs
Interrupt
Enable
USB Bus
RST
Interrupt
Enable
Read/Write
Reset
–
–
R/W
0
R/W
0
-
R/W
0
R/W
0
R/W
0
R/W
0
X
Figure 14-1. Global Interrupt Enable Register
Bit 0 : USB Bus RST Interrupt Enable
1 = Enable Interrupt on a USB Bus Reset; 0 = Disable interrupt on a USB Bus Reset (Refer to section 14.3).
Bit 1 :128-µs Interrupt Enable
1 = Enable Timer interrupt every 128 µs; 0 = Disable Timer Interrupt for every 128 µs.
Bit 2 : 1.024-ms Interrupt Enable
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1 = Enable Timer interrupt every 1.024 ms ; 0 = Disable Timer Interrupt every 1.024 ms.
Bit 3 : USB Hub Interrupt Enable
1 = Enable Interrupt on a Hub status change; 0 = Disable interrupt due to hub status change. (Refer to section 14.6.)
Bit 4 : Reserved .
Bit 5 : GPIO Interrupt Enable
1 = Enable Interrupt on falling/rising edge on any GPIO; 0 = Disable Interrupt on falling/rising edge on any GPIO (Refer to
section 14.7, 9.1 and 9.2.).
Bit 6 : I2C Interrupt Enable
1 = Enable Interrupt on I2C related activity; 0 = Disable I2C related activity interrupt. (Refer to section 14.8.)
Bit 7 : Reserved.
USB Endpoint Interrupt Enable
Address 0X21
Bit #
7
6
5
4
3
2
1
0
Bit Name
Reserved
Reserved
Reserved
EPB1
Interrupt
Enable
EPB0
Interrupt
Enable
EPA2
Interrupt
Enable
EPA1
Interrupt
Enable
EPA0
Interrupt
Enable
Read/Write
Reset
–
–
–
–
–
–
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 14-2. USB Endpoint Interrupt Enable Register
Bit 0: EPA0 Interrupt Enable
1= Enable Interrupt on data activity through endpoint A0; 0= Disable Interrupt on data activity through endpoint A0
Bit 1: EPA1 Interrupt Enable
1= Enable Interrupt on data activity through endpoint A1; 0= Disable Interrupt on data activity through endpoint A1
Bit 2: EPA2 Interrupt Enable
1= Enable Interrupt on data activity through endpoint A2; 0= Disable Interrupt on data activity through endpoint A2.
Bit 3: EPB0 Interrupt Enable
1= Enable Interrupt on data activity through endpoint B0; 0= Disable Interrupt on data activity through endpoint B0
Bit 4: EPB1 Interrupt Enable
1= Enable Interrupt on data activity through endpoint B1; 0= Disable Interrupt on data activity through endpoint B1
Bit [7..5] : Reserved
During a reset, the contents the Global Interrupt Enable Register and USB End Point Interrupt Enable Register are cleared,
effectively, disabling all interrupts
The interrupt controller contains a separate flip-flop for each interrupt. See Figure 14-3 for the logic block diagram of the interrupt
controller. When an interrupt is generated, it is first registered as a pending interrupt. It stays pending until it is serviced or a reset
occurs. A pending interrupt only generates an interrupt request if it is enabled by the corresponding bit in the interrupt enable
registers. The highest priority interrupt request is serviced following the completion of the currently executing instruction.
When servicing an interrupt, the hardware does the following:
1. Disables all interrupts by clearing the Global Interrupt Enable bit in the CPU (the state of this bit can be read at Bit 2 of the
Processor Status and Control Register, Figure 13-1).
2. Clears the flip-flop of the current interrupt.
3. Generates an automatic CALL instruction to the ROM address associated with the interrupt being serviced (i.e., the Interrupt
Vector, see Section 14.1).
The instruction in the interrupt table is typically a JMP instruction to the address of the Interrupt Service Routine (ISR). The user
can reenable interrupts in the interrupt service routine by executing an EI instruction. Interrupts can be nested to a level limited
only by the available stack space.
The Program Counter value as well as the Carry and Zero flags (CF, ZF) are stored onto the Program Stack by the automatic
CALL instruction generated as part of the interrupt acknowledge process. The user firmware is responsible for ensuring that the
processor state is preserved and restored during an interrupt. The PUSH A instruction should typically be used as the first
command in the ISR to save the accumulator value and the POP A instruction should be used to restore the accumulator value
just before the RETI instruction. The program counter CF and ZF are restored and interrupts are enabled when the RETI
instruction is executed.
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The DI and EI instructions can be used to disable and enable interrupts, respectively. These instructions affect only the Global
Interrupt Enable bit of the CPU. If desired, EI can be used to re-enable interrupts while inside an ISR, instead of waiting for the
RETI that exits the ISR. While the global interrupt enable bit is cleared, the presence of a pending interrupt can be detected by
examining the IRQ Sense bit (Bit 7 in the Processor Status and Control Register).
14.1
Interrupt Vectors
The Interrupt Vectors supported by the USB Controller are listed in Table 14-1. The lowest-numbered interrupt (USB Bus Reset
interrupt) has the highest priority, and the highest-numbered interrupt (I2C interrupt) has the lowest priority.
USB Reset Clear
Interrupt
Vector
To CPU
CLR
USB Reset IRQ
128-µs CLR
128-µs IRQ
1-ms CLR
1-ms IRQ
1
D
Q
Enable [0]
(Reg 0x20)
CPU
USB Reset Int
IRQ Sense
IRQ
CLK
IRQout
AddrA EP0 CLR
AddrA EP0 IRQ
AddrA EP1 CLR
AddrA EP1 IRQ
AddrA EP2 CLR
AddrA EP2 IRQ
CLR
Q
1
D
Global
Interrupt
Enable
Bit
Int Enable
Sense
Enable [2]
(Reg 0x21)
AddrB EP0 CLR
AddrB EP0 IRQ
AddrA ENP2 Int
CLK
AddrB EP1 CLR
AddrB EP1 IRQ
Controlled by DI, EI, and
RETI Instructions
CLR
Hub CLR
Hub IRQ
Interrupt
Acknowledge
DAC CLR
DAC IRQ
GPIO CLR
GPIO IRQ
2
I C CLR
CLR
2
I C IRQ
Q
1
Enable [6]
(Reg 0x20)
D
Interrupt Priority Encoder
2
I C Int
CLK
Figure 14-3. Interrupt Controller Function Diagram
Although Reset is not an interrupt, the first instruction executed after a reset is at PROM address 0x0000h—which corresponds
to the first entry in the Interrupt Vector Table. Because the JMP instruction is two bytes long, the interrupt vectors occupy two bytes.
Table 14-1. Interrupt Vector Assignments
Interrupt Vector Number
ROM Address
0x0000
0x0002
0x0004
0x0006
0x0008
0x000A
0x000C
0x000E
0x0010
0x0012
0x0014
0x0016
0x0018
Function
Execution after Reset begins here
USB Bus Reset interrupt
128-µs timer interrupt
Not Applicable
1
2
3
1.024-ms timer interrupt
4
USB Address A Endpoint 0 interrupt
USB Address A Endpoint 1 interrupt
USB Address A Endpoint 2 interrupt
USB Address B Endpoint 0 interrupt
USB Address B Endpoint 1 interrupt
USB Hub interrupt
5
6
7
8
9
10
11
12
DAC interrupt
GPIO interrupt
I2C interrupt
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14.2
Interrupt Latency
Interrupt latency can be calculated from the following equation:
Interrupt latency =(Number of clock cycles remaining in the current instruction) + (10 clock cycles for the CALL instruction) +
(5 clock cycles for the JMP instruction)
For example, if a 5-clock cycle instruction such as JC is being executed when an interrupt occurs, the first instruction of the
Interrupt Service Routine executes a minimum of 16 clocks (1+10+5) or a maximum of 20 clocks (5+10+5) after the interrupt is
issued. For a 12-MHz internal clock (6-MHz crystal), 20 clock periods is 20/12 MHz = 1.667 µs.
14.3
USB Bus Reset Interrupt
The USB Controller recognizes a USB Reset when a Single Ended Zero (SE0) condition persists on the upstream USB port for
12–16 µs. SE0 is defined as the condition in which both the D+ line and the D– line are LOW. A USB Bus Reset may be recognized
for an SE0 as short as 12 µs, but is always recognized for an SE0 longer than 16 µs. When a USB Bus Reset is detected, bit 5
of the Processor Status and Control Register (Figure 13-1) is set to record this event. In addition, the controller clears the following
registers:
SIE Section:.... USB Device Address Registers (0x10, 0x40)
Hub Section: ......................Hub Ports Connect Status (0x48)
........................................................Hub Ports Enable (0x49)
........................................................ Hub Ports Speed (0x4A)
.................................................... Hub Ports Suspend (0x4D)
.......................................... Hub Ports Resume Status (0x4E)
................................................. Hub Ports SE0 Status (0x4F)
........................................................... Hub Ports Data (0x50)
.............................................Hub Downstream Force (0x51).
A USB Bus Reset Interrupt is generated at the end of the USB Bus Reset condition when the SE0 state is deasserted. If the USB
reset occurs during the start-up delay following a POR, the delay is aborted as described in Section 7.1.
14.4
Timer Interrupt
There are two periodic timer interrupts: the 128-µs interrupt and the 1.024-ms interrupt. The user should disable both timer
interrupts before going into the suspend mode to avoid possible conflicts between servicing the timer interrupts first or the suspend
request first.
14.5
USB Endpoint Interrupts
There are five USB endpoint interrupts, one per endpoint. A USB endpoint interrupt is generated after the USB host writes to a
USB endpoint FIFO or after the USB controller sends a packet to the USB host. The interrupt is generated on the last packet of
the transaction (e.g., on the host’s ACK on an IN transfer, or on the device ACK on an OUT transfer). If no ACK is received during
an IN transaction, no interrupt is generated.
14.6
USB Hub Interrupt
A USB hub interrupt is generated by the hardware after a connect/disconnect change, babble, or a resume event is detected by
the USB repeater hardware. The babble and resume events are additionally gated by the corresponding bits of the Hub Port
Enable Register (Figure 16-3). The connect/disconnect event on a port does not generate an interrupt if the SIE does not drive
the port (i.e., the port is being forced).
14.7
GPIO Interrupt
Each of the GPIO pins can generate an interrupt, if enabled. The interrupt polarity can be programmed for each GPIO port as
part of the GPIO configuration. All of the GPIO pins share a single interrupt vector, which means the firmware needs to read
theGPIO ports with enabled interrupts to determine which pin or pins caused an interrupt. A block diagram of the GPIO interrupt
logic is shown in Figure 14-4
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.
Port
Configuration
GPIO Interrupt
Flip Flop
Register
OR Gate
(1 input per
GPIO pin)
IRQout
Interrupt
Priority
1
D
Q
Interrupt
Vector
M
U
X
Encoder
GPIO
Pin
CLR
Port Interrupt
Enable Register
1 = Enable
0 = Disable
IRA
Global
GPIO Interrupt
Enable
1 = Enable
0 = Disable
(Bit 5, Register 0x20)
Figure 14-4. GPIO Interrupt Structure
Refer to Sections 9.1 and 9.2 for more information of setting GPIO interrupt polarity and enabling individual GPIO interrupts. If
one port pin has triggered an interrupt, no other port pins can cause a GPIO interrupt until that port pin has returned to its inactive
(non-trigger) state or its corresponding port interrupt enable bit is cleared. The USB Controller does not assign interrupt priority
to different port pins and the Port Interrupt Enable Registers are not cleared during the interrupt acknowledge process.
14.8
I2C Interrupt
The I2C interrupt occurs after various events on the I2C-compatible bus to signal the need for firmware interaction. This generally
involves reading the I2C Status and Control Register (Figure 12-2) to determine the cause of the interrupt, loading/reading the
I2C Data Register as appropriate, and finally writing the Processor Status and Control Register (Figure 13-1) to initiate the
subsequent transaction. The interrupt indicates that status bits are stable and it is safe to read and write the I2C registers. Refer
to Section 12.0 for details on the I2C registers.
When enabled, the I2C-compatible state machines generate interrupts on completion of the following conditions. The referenced
bits are in the I2C Status and Control Register.
1. In slave receive mode, after the slave receives a byte of data: The Addr bit is set, if this is the first byte since a start or restart
signal was sent by the external master. Firmware must read or write the data register as necessary, then set the ACK, Xmit
MODE, and Continue/Busy bits appropriately for the next byte.
2. In slave receive mode, after a stop bit is detected: The Received Stop bit is set, if the stop bit follows a slave receive transaction
where the ACK bit was cleared to 0, no stop bit detection occurs.
3. In slave transmit mode, after the slave transmits a byte of data: The ACK bit indicates if the master that requested the byte
acknowledged the byte. If more bytes are to be sent, firmware writes the next byte into the Data Register and then sets the
Xmit MODE and Continue/Busy bits as required.
4. In master transmit mode, after the master sends a byte of data. Firmware should load the Data Register if necessary, and
set the Xmit MODE, MSTR MODE, and Continue/Busy bits appropriately. Clearing the MSTR MODE bit issues a stop signal
to the I2C-compatible bus and return to the idle state.
5. In master receive mode, after the master receives a byte of data: Firmware should read the data and set the ACK and
Continue/Busy bits appropriately for the next byte. Clearing the MSTR MODE bit at the same time causes the master state
machine to issue a stop signal to the I2C-compatible bus and leave the I2C-compatible hardware in the idle state.
6. When the master loses arbitration: This condition clears the MSTR MODE bit and sets the ARB Lost/Restart bit immediately
and then waits for a stop signal on the I2C-compatible bus to generate the interrupt.
The Continue/Busy bit is cleared by hardware prior to interrupt conditions 1 to 4. Once the Data Register has been read or written,
firmware should configure the other control bits and set the Continue/Busy bit for subsequent transactions. Following an interrupt
from master mode, firmware should perform only one write to the Status and Control Register that sets the Continue/Busy bit,
without checking the value of the Continue/Busy bit. The Busy bit may otherwise be active and I2C register contents may be
changed by the hardware during the transaction, until the I2C interrupt occurs.
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15.0
USB Overview
The USB hardware includes a USB Hub repeater with one upstream and up to seven downstream ports. The USB Hub repeater
interfaces to the microcontroller through a full-speed serial interface engine (SIE). An external series resistor of Rext must be
placed in series with all upstream and downstream USB outputs in order to meet the USB driver requirements of the USB
specification. The CY7C65x13 microcontroller can provide the functionality of a compound device consisting of a USB hub and
permanently attached functions.
15.1
USB Serial Interface Engine (SIE)
The SIE allows the CY7C65x13 microcontroller to communicate with the USB host through the USB repeater portion of the hub.
The SIE simplifies the interface between the microcontroller and USB by incorporating hardware that handles the following USB
bus activity independently of the microcontroller:
• Bit stuffing/unstuffing
• Checksum generation/checking
• ACK/NAK/STALL
• Token type identification
• Address checking.
Firmware is required to handle the following USB interface tasks:
• Coordinate enumeration by responding to SETUP packets
• Fill and empty the FIFOs
• Suspend/Resume coordination
• Verify and select DATA toggle values.
15.2
USB Enumeration
The internal hub and any compound device function are enumerated under firmware control. The hub is enumerated first, followed
by any integrated compound function. After the hub is enumerated, the USB host can read hub connection status to determine
which (if any) of the downstream ports need to be enumerated. The following is a brief summary of the typical enumeration
process of the CY7C65x13 by the USB host. For a detailed description of the enumeration process, refer to the USB specification.
In this description, ‘Firmware’ refers to embedded firmware in the CY7C65x13 controller.
1. The host computer sends a SETUP packet followed by a DATA packet to USB address 0 requesting the Device descriptor.
2. Firmware decodes the request and retrieves its Device descriptor from the program memory tables.
3. The host computer performs a control read sequence and Firmware responds by sending the Device descriptor over the USB
bus, via the on-chip FIFOs.
4. After receiving the descriptor, the host sends a SETUP packet followed by a DATA packet to address 0 assigning a new USB
address to the device.
5. Firmware stores the new address in its USB Device Address Register (for example, as Address B) after the no-data control
sequence completes.
6. The host sends a request for the Device descriptor using the new USB address.
7. Firmware decodes the request and retrieves the Device descriptor from program memory tables.
8. The host performs a control read sequence and Firmware responds by sending its Device descriptor over the USB bus.
9. The host generates control reads from the device to request the Configuration and Report descriptors.
10.Once the device receives a Set Configuration request, its functions may now be used.
11.Following enumeration as a hub, Firmware can optionally indicate to the host that a compound device exists (for example, the
keyboard in a keyboard/hub device).
12.The host carries out the enumeration process with this additional function as though it were attached downstream from the hub.
13.When the host assigns an address to this device, it is stored as the other USB address (for example, Address A).
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16.0
USB Hub
A USB hub is required to support:
• Connectivity behavior: service connect/disconnect detection
• Bus fault detection and recovery
• Full-/Low-speed device support
These features are mapped onto a hub repeater and a hub controller. The hub controller is supported by the processor integrated
into the CY7C65x13 microcontrollers. The hardware in the hub repeater detects whether a USB device is connected to a
downstream port. The connection to a downstream port is through a differential signal pair (D+ and D–). Each downstream port
provided by the hub requires external RUDN resistors from each signal line to ground, so that when a downstream port has no
device connected, the hub reads a LOW (zero) on both D+ and D–. This condition is used to identify the “no connect” state.
The hub must have a resistor RUUP connected between its upstream D+ line and VREG to indicate it is a full speed USB device.
The hub generates an EOP at EOF1, in accordance with the USB 1.1 Specification (section 11.2.2, page 234) as well as USB
2.0 specification (section 11.2.5, page 304).
16.1
Connecting/Disconnecting a USB Device
A low-speed (1.5 Mbps) USB device has a pull-up resistor on the D– pin. At connect time, the bias resistors set the signal levels
on the D+ and D– lines. When a low-speed device is connected to a hub port, the hub sees a LOW on D+ and a HIGH on D–.
This causes the hub repeater to set a connect bit in the Hub Ports Connect Status register for the downstream port (see
Figure 16-1). Then the hub repeater generates a Hub Interrupt to notify the microcontroller that there has been a change in the
Hub downstream status. The firmware sets the speed of this port in the Hub Ports Speed Register (see Figure 16-2).
A full-speed (12 Mbps) USB device has a pull-up resistor from the D+ pin, so the hub sees a HIGH on D+ and a LOW on D–. In
this case, the hub repeater sets a connect bit in the Hub Ports Connect Status register and generates a Hub Interrupt to notify
the microcontroller of the change in Hub status. The firmware sets the speed of this port in the Hub Ports Speed Register (see
Figure 16-2)
Connects are recorded by the time a non-SE0 state lasts for more than 2.5 µs on a downstream port.
When a USB device is disconnected from the Hub, the downstream signal pair eventually floats to a single-ended zero state. The
hub repeater recognizes a disconnect once the SE0 state on a downstream port lasts from 2.0 to 2.5 µs. On a disconnect, the
corresponding bit in the Hub Ports Connect Status register is cleared, and the Hub Interrupt is generated
.
Hub Ports Connect Status
Address 0x48
Bit #
7
6
5
4
3
2
1
0
Bit Name
Reserved
Port 7
Connect
Status
Port 6
Connect
Status
Port 5
Connect
Status
Port 4
Connect
Status
Port 3
Connect
Status
Port 2
Connect
Status
Port 1
Connect
Status
Read/Write
Reset
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 16-1. Hub Ports Connect Status
Bit [0..6] : Port x Connect Status (where x = 1..7).
When set to 1, Port x is connected; When set to 0, Port x is disconnected.
Bit 7 : Reserved.
Set to 0.
The Hub Ports Connect Status register is cleared to zero by reset or USB bus reset, then set to match the hardware configuration
by the hub repeater hardware. The Reserved bit [7] should always read as ‘0’ to indicate no connection
.
Hub Ports Speed
Address 0x4A
Bit #
7
6
5
4
3
2
1
0
Bit Name
Reserved
Port 7
Speed
Port 6
Speed
Port 5
Speed
Port 4
Speed
Port 3
Speed
Port 2
Speed
Port 1
Speed
Read/Write
Reset
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 16-2. Hub Ports Speed
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Bit [0..6] : Port x Speed (where x = 1..7).
Set to 1 if the device plugged in to Port x is Low Speed; Set to 0 if the device plugged in to Port x is Full Speed.
Bit 7 : Reserved.
Set to 0.
The Hub Ports Speed register is cleared to zero by reset or bus reset. This must be set by the firmware on issuing a port reset.
The Reserved bit [7] should always read as ‘0.’
16.2
Enabling/Disabling a USB Device
After a USB device connection has been detected, firmware must update status change bits in the hub status change data
structure that is polled periodically by the USB host. The host responds by sending a packet that instructs the hub to reset and
enable the downstream port. Firmware then sets the bit in the Hub Ports Enable register (Figure 16-3), for the downstream port.
The hub repeater hardware responds to an enable bit in the Hub Ports Enable register (Figure 16-3) by enabling the downstream
port, so that USB traffic can flow to and from that port.
If a port is marked enabled and is not suspended, it receives all USB traffic from the upstream port, and USB traffic from the
downstream port is passed to the upstream port (unless babble is detected). Low-speed ports do not receive full-speed traffic
from the upstream port.
When firmware writes to the Hub Ports Enable register (Figure 16-3) to enable a port, the port is not enabled until the end of any
packet currently being transmitted. If there is no USB traffic, the port is enabled immediately.
When a USB device disconnection has been detected, firmware must update status bits in the hub change status data structure
that is polled periodically by the USB host. In suspended mode, a connect or disconnect event generates an interrupt (if the hub
interrupt is enabled) even if the port is disabled
.
Hub Ports Enable Register
Address 0x49
Bit #
7
6
5
4
3
2
1
0
Bit Name
Reserved
Port 7
Enable
Port 6
Enable
Port 5
Enable
Port 4
Enable
Port 3
Enable
Port 2
Enable
Port 1
Enable
Read/Write
Reset
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 16-3. Hub Ports Enable Register
Bit [0..6] : Port x Enable (where x = 1..7)
Set to 1 if Port x is enabled; Set to 0 if Port x is disabled
Bit 7 : Reserved.
Set to 0.
The Hub Ports Enable register is cleared to zero by reset or bus reset to disable all downstream ports as the default condition.
A port is also disabled by internal hub hardware (enable bit cleared) if babble is detected on that downstream port. Babble is
defined as:
• Any non-idle downstream traffic on an enabled downstream port at EOF2.
• Any downstream port with upstream connectivity established at EOF2 (i.e., no EOP received by EOF2).
16.3
Hub Downstream Ports Status and Control
Data transfer on hub downstream ports is controlled according to the bit settings of the Hub Downstream Ports Control Register
(Figure 16-4). Each downstream port is controlled by two bits, as defined in Table 16-1 below. The Hub Downstream Ports Control
Register is cleared upon reset or bus reset, and the reset state is the state for normal USB traffic. Any downstream port being
forced must be marked as disabled (Figure 16-3) for proper operation of the hub repeater.
Firmware should use this register for driving bus reset and resume signaling to downstream ports. Controlling the port pins through
this register uses standard USB edge rate control according to the speed of the port, set in the Hub Port Speed Register.
The downstream USB ports are designed for connection of USB devices, but can also serve as output ports under firmware
control. This allows unused USB ports to be used for functions such as driving LEDs or providing additional input signals. Pulling
up these pins to voltages above VREF may cause current flow into the pin.
This register is not reset by USB bus reset. These bits must be cleared before going into suspend.
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Hub Downstream Ports Control Register
Address 0x4B
Bit #
7
6
5
4
3
2
1
0
Bit Name
Port 4
Port 4
Port 3
Port 3
Port 2
Port 2
Port 1
Port 1
Control Bit 1 Control Bit 0 Control Bit 1 Control Bit 0 Control Bit 1 Control Bit 0 Control Bit 1 Control Bit
0
Read/Write
Reset
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 16-4. Hub Downstream Ports Control Register
Table 16-1. Control Bit Definition for Downstream Ports
Control Bits
Bit1
0
Bit 0
Control Action
Not Forcing (Normal USB Function)
Force Differential ‘1’ (D+ HIGH, D– LOW)
Force Differential ‘0’ (D+ LOW, D– HIGH)
Force SE0 state
0
1
0
1
0
1
1
An alternate means of forcing the downstream ports is through the Hub Ports Force Low Register (Figure 16-5) and Hub Ports
Force High Register (Figure 16-6). With these registers the pins of the downstream ports can be individually forced LOW, or left
unforced. Unlike the Hub Downstream Ports Control Register, above, the Force Low Register does not produce standard USB
edge rate control on the forced pins. However, this register allows downstream port pins to be held LOW in suspend. This register
can be used to drive SE0 on all downstream ports when unconfigured, as required in the USB 1.1 specification
.
Hub Ports Force Low
Address 0x51
Bit #
7
6
5
4
3
2
1
0
Bit Name
Force Low
D+[4]
Force Low
D-[4]
Force Low
D+[3]
Force Low
D–[3]
Force Low
D+[2]
Force Low
D–[2]
Force Low
D+[1]
Force Low
D–[1]
Read/Write
Reset
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 16-5. Hub Ports Force Low Register
Hub Ports Force Low
Address 0x52
Bit #
7
6
5
4
3
2
1
0
Bit Name
Reserved
Reserved
Force Low
D+[7]
Force Low
D–[7]
Force Low
D+[6]
Force Low
D–[6]
Force Low
D+[5]
Force Low
D–[5]
Read/Write
Reset
–
–
–
–
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 16-6. Hub Ports Force Low Register
The data state of downstream ports can be read through the HUB Ports SE0 Status Register (Figure 16-7) and the Hub Ports
Data Register (Figure 16-8). The data read from the Hub Ports Data Register is the differential data only and is independent of
the settings of the Hub Ports Speed Register (Figure 16-2). When the SE0 condition is sensed on a downstream port, the
corresponding bits of the Hub Ports Data Register hold the last differential data state before the SE0. Hub Ports SE0 Status
Register and Hub Ports Data Register are cleared upon reset or bus reset
.
Hub Ports SE0 Status
Address 0x4F
Bit #
7
6
5
4
3
2
1
0
Bit Name
Reserved
Port 7
Port 6
Port 5
Port 4
Port 3
Port 2
Port 1
SE0 Status SE0 Status SE0 Status SE0 Status SE0 Status SE0 Status SE0 Status
Read/Write
Reset
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
Figure 16-7. Hub Ports SE0 Status Register
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Bit [0..6]: Port x SE0 Status (where x = 1..7).
Set to 1 if a SE0 is output on the Port x bus; Set to 0 if a Non-SE0 is output on the Port x bus.
Bit 7: Reserved.
Set to 0
.
Hub Ports Data
ADDRESS 0x50
Bit #
7
6
5
4
3
2
1
0
Bit Name
Reserved
Port 7 Diff.
Data
Port 6 Diff.
Data
Port 5 Diff.
Data
Port 4 Diff.
Data
Port 3 Diff.
Data
Port 2 Diff.
Data
Port 1 Diff.
Data
Read/Write
Reset
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
Figure 16-8. Hub Ports Data Register
Bit [0..6] : Port x Diff Data (where x = 1..7).
Set to 1 if D+ > D- (forced differential 1, if signal is differential, i.e. not a SE0 or SE1). Set to 0 if D- > D+ (forced differential
0, if signal is differential, i.e. not a SE0 or SE1).
Bit 7 : Reserved.
Set to 0.
16.4
Downstream Port Suspend and Resume
The Hub Ports Suspend Register (Figure 16-9) and Hub Ports Resume Status Register (Figure 16-10) indicate the suspend and
resume conditions on downstream ports. The suspend register must be set by firmware for any ports that are selectively
suspended. Also, this register is only valid for ports that are selectively suspended.
If a port is marked as selectively suspended, normal USB traffic is not sent to that port. Resume traffic is also prevented from
going to that port, unless the Resume comes from the selectively suspended port. If a resume condition is detected on the port,
hardware reflects a Resume back to the port, sets the Resume bit in the Hub Ports Resume Register, and generates a hub
interrupt.
If a disconnect occurs on a port marked as selectively suspended, the suspend bit is cleared.
The Device Remote Wakeup bit (bit 7) of the Hub Ports Suspend Register controls whether or not the resume signal is propagated
by the hub after a connect or a disconnect event. If the Device Remote Wakeup bit is set, the hub will automatically propagate
the resume signal after a connect or a disconnect event. If the Device Remote Wakeup bit is cleared, the hub will not propagate
the resume signal. The setting of the Device Remote Wakeup flag has no impact on the propagation of the resume signal after
a downstream remote wakeup event. The hub will automatically propagate the resume signal after a remote wakeup event,
regardless of the state of the Device Remote wakeup bit. The state of this bit has no impact on the generation of the hub interrupt.
A resume bit is set automatically when hardware detects a resume condition on a selectively suspended downstream port. The
resume condition is a differential ‘1’ for a low-speed device and a differential ‘0’ for a full-speed device.
These registers are cleared on reset or USB bus reset
.
Hub Ports Suspend
Address 0x4D
Bit #
7
6
5
4
3
2
1
0
Bit Name
Device
Remote
Wakeup
Port 7
Selective
Suspend
Port 6
Selective
Suspend
Port 5
Selective
Suspend
Port 4
Selective
Suspend
Port 3
Selective
Suspend
Port 2
Selective
Suspend
Port 1
Selective
Suspend
Read/Write
Reset
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 16-9. Hub Ports Suspend Register
Bit [0..6] : Port x Selective Suspend (where x = 1..7).
Set to 1 if Port x is Selectively Suspended; Set to 0 if Port x Do not suspend.
Bit 7 : Device Remote Wakeup.
When set to 1, Enable hardware upstream resume signaling for connect/disconnect events during global resume.
When set to 0, Disable hardware upstream resume signaling for connect/disconnect events during global resume.
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Hub Ports Resume
Address 0x4E
Bit #
7
6
5
4
3
2
1
0
Bit Name
Read/Write
Reset
Reserved
Resume 7
Resume 6
Resume 5
Resume 4
Resume 3
Resume 2
Resume 1
-
R
0
R
0
R
0
R
0
R
0
R
0
R
0
0
Figure 16-10. Hub Ports Resume Status Register
Bit [0..6] : Resume x (where x = 1..7).
When set to 1 Port x requesting to be resumed (set by hardware); default state is 0.
Bit 7 : Reserved.
Set to 0.
Resume from a selectively suspended port, with the hub not in suspend, typically involves the following actions:
1. Hardware detects the Resume, drives a K to the port, and generates the hub interrupt. The corresponding bit in the Resume
Status Register (0x4E) reads ‘1’ in this case.
2. Firmware responds to hub interrupt, and reads register 0x4E to determine the source of the Resume.
3. Firmware begins driving K on the port for 10 ms or more through register 0x4B.
4. Firmware clears the Selective Suspend bit for the port (0x4D), which clears the Resume bit (0x4E). This ends the hardware-driv-
en Resume, but the firmware-driven Resume continues. To prevent traffic being fed by the hub repeater to the port during or
just after the Resume, firmware should disable this port.
5. Firmware drives a timed SE0 on the port for two low-speed bit times as appropriate. Firmware must disable interrupts during
this SE0 so the SE0 pulse isn’t inadvertently lengthened, and appear as a bus reset to the downstream device.
6. Firmware drives a J on the port for one low-speed bit time, then it idles the port.
7. Firmware re-enables the port.
Resume when the hub is suspended typically involves these actions:
1. Hardware detects the Resume, drives a K on the upstream (which is then reflected to all downstream enabled ports), and
generates the hub interrupt.
2. The part comes out of suspend and the clocks start.
3. Once the clocks are stable, firmware execution resumes. An internal counter ensures that this takes at least 1 ms. Firmware
should check for Resume from any selectively suspended ports. If found, the Selective Suspend bit for the port should be
cleared; no other action is necessary.
4. The Resume ends when the host stops sending K from upstream. Firmware should check for changes to the Enable and
Connect Registers. If a port has become disabled but is still connected, an SE0 has been detected on the port. The port should
be treated as having been reset, and should be reported to the host as newly connected.
Firmware can choose to clear the Device Remote Wake-up bit (if set) to implement firmware timed states for port changes. All
allowed port changes wake the part. Then, the part can use internal timing to determine whether to take action or return to
suspend. If Device Remote Wake-up is set, automatic hardware assertions take place on Resume events.
16.5
USB Upstream Port Status and Control
USB status and control is regulated by the USB Status and Control Register, as shown in Figure 16-11. All bits in the register are
cleared during reset
.
USB Status and Control
Address 0x1F
Bit #
7
6
5
4
3
2
1
0
Bit Name
Endpoint
Size
Endpoint
Mode
D+
Upstream
D–
Upstream
Bus Activity
Control
Action
Bit 2
Control
Action
Bit 1
Control
Action
Bit 0
Read/Write
Reset
R/W
0
R/W
0
R
0
R
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 16-11. USB Status and Control Register
Bits[2..0]: Control Action
Set to control action as per table 16-2.The three control bits allow the upstream port to be driven manually by firmware. For
normal USB operation, all of these bits must be cleared. Table 16-2 shows how the control bits affect the upstream port.
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Table 16-2. Control Bit Definition for Upstream Port
Control Bits
000
Control Action
Not Forcing (SIE Controls Driver)
Force D+[0] HIGH, D–[0] LOW
Force D+[0] LOW, D–[0] HIGH
Force SE0; D+[0] LOW, D–[0] LOW
Force D+[0] LOW, D–[0] LOW
Force D+[0] HiZ, D–[0] LOW
Force D+[0] LOW, D–[0] HiZ
Force D+[0] HiZ, D–[0] HiZ
001
010
011
100
101
110
111
Bit 3: Bus Activity.
This is a “sticky” bit that indicates if any non-idle USB event has occurred on the upstream USB port. Firmware should
check and clear this bit periodically to detect any loss of bus activity. Writing a ‘0’ to the Bus Activity bit clears it, while writing
a ‘1’ preserves the current value. In other words, the firmware can clear the Bus Activity bit, but only the SIE can set it.
Bits 4 and 5: D– Upstream and D+ Upstream.
These bits give the state of each upstream port pin individually: 1 = HIGH, 0 = LOW.
Bit 6: Endpoint Mode.
This bit used to configure the number of USB endpoints. See Section 17.2 for a detailed description.
Bit 7: Endpoint Size.
This bit used to configure the number of USB endpoints. See Section 17.2 for a detailed description.
The hub generates an EOP at EOF1 in accordance with the USB 1.1 Specification, Section 11.2.2.
17.0
USB Serial Interface Engine Operation
The CY7C65x13 SIE supports operation as a single device or a compound device. This section describes the two device
addresses, the configurable endpoints, and the endpoint function.
17.1
USB Device Addresses
The USB Controller provides two USB Device Address Registers: A (addressed at 0x10)and B (addressed at 0x40). Upon reset
and under default conditions, Device A has three endpoints and Device B has two endpoints. The USB Device Address Register
contents are cleared during a reset, setting the USB device addresses to zero and disabling these addresses. Figure 17-1 shows
the format of the USB Address Registers.
USB Device Address (Device A, B)
Addresses 0x10(A) and 0x40(B)
Bit #
7
6
5
4
3
2
1
0
Bit Name
Device
Address
Enable
Device
Address
Bit 6
Device
Address
Bit 5
Device
Address
Bit 4
Device
Address
Bit 3
Device
Address
Bit 2
Device
Address
Bit 1
Device
Address
Bit 0
Read/Write
Reset
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 17-1. USB Device Address Registers
Bits[6..0]: Device Address.
Firmware writes this bits during the USB enumeration process to the non-zero address assigned by the USB host.
Bit 7: Device Address Enable.
Must be set by firmware before the SIE can respond to USB traffic to the Device Address.
17.2
USB Device Endpoints
The CY7C65x13 controller supports up to two addresses and five endpoints for communication with the host. The configuration
of these endpoints, and associated FIFOs, is controlled by bits [7,6] of the USB Status and Control Register (Figure 16-11). Bit 7
controls the size of the endpoints and bit 6 controls the number of addresses. These configuration options are detailed in
Table 17-1. Endpoint FIFOs are part of user RAM (as shown in Section 5.4.1).
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Table 17-1. Memory Allocation for Endpoints
USB Status And Control Register (0x1F) Bits [7, 6]
[0,0]
[1,0]
[0,1]
[1,1]
Two USB Addresses:
A (3 Endpoints) and
B (2 Endpoints)
Two USB Addresses:
A (3 Endpoints) and
B (2 Endpoints)
One USB Address:
A (5 Endpoints)
One USB Address:
A (5 Endpoints)
Start
Start
Start
Start
Address
0xA8
Label
Address
0xD8
0xE0
Size
Label
Address
Size
Label
Address
0xD8
0xE0
Size
Label
Size
8
EPB1
EPB0
EPA2
EPA1
EPA0
8
8
8
8
8
EPB0
EPB1
EPA0
EPA1
EPA2
0xA8
8
8
EPA4
EPA3
EPA2
EPA1
EPA0
8
8
8
8
8
EPA3
EPA4
EPA0
EPA1
EPA2
0xB0
0xB0
8
0xE8
0xB8
8
0xE8
0xB8
8
0xF0
0xC0
32
32
0xF0
0xC0
32
32
0xF8
0xE0
0xF8
0xE0
When the SIE writes data to a FIFO, the internal data bus is driven by the SIE; not the CPU. This causes a short delay in the
CPU operation. The delay is three clock cycles per byte. For example, an 8-byte data write by the SIE to the FIFO generates a
delay of 2 µs (3 cycles/byte * 83.33 ns/cycle * 8 bytes).
17.3
USB Control Endpoint Mode Registers
All USB devices are required to have a control endpoint 0 (EPA0 and EPB0) that is used to initialize and control each USB
address. Endpoint 0 provides access to the device configuration information and allows generic USB status and control accesses.
Endpoint 0 is bidirectional to both receive and transmit data. The other endpoints are unidirectional, but selectable by the user
as IN or OUT endpoints.
The endpoint mode registers are cleared during reset. When USB Status And Control Register Bits [6,7] are set to [0,0] or [1,0],
the endpoint zero EPA0 and EPB0 mode registers use the format shown in Figure 17-2.
USB Device Endpoint Zero Mode (A0, B0)
Addresses 0x12(A0) and 0x42(B0)
Bit #
7
6
5
4
3
2
1
0
Bit Name
Endpoint 0
SETUP
Endpoint 0 Endpoint 0
ACK
Mode Bit 3 Mode Bit 2 Mode Bit 1 Mode Bit 0
IN
OUT
Received
Received
Received
Read/Write
Reset
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Figure 17-2. USB Device Endpoint Zero Mode Registers
Bits[3..0]: Mode.
These sets the mode which control how the control endpoint responds to traffic.
Bit 4: ACK.
This bit is set whenever the SIE engages in a transaction to the register’s endpoint that completes with an ACK packet.
Bit 5: Endpoint 0 OUT Received.
1= Token received is an OUT token. 0= Token received is not an OUT token. This bit is set by the SIE to report the type of
token received by the corresponding device address is an OUT token. The bit must be cleared by firmware as part of the
USB processing.
Bit 6: Endpoint 0 IN Received.
1= Token received is an IN token. 0= Token received is not an IN token. This bit is set by the SIE to report the type of token
received by the corresponding device address is an IN token. The bit must be cleared by firmware as part of the USB
processing.
Bit 7: Endpoint 0 SETUP Received.
1 = Token received is a SETUP token. 0= Token received is not a SETUP token. This bit is set ONLY by the SIE to report
the type of token received by the corresponding device address is a SETUP token. Any write to this bit by the CPU will
clear it (set it to 0). The bit is forced HIGH from the start of the data packet phase of the SETUP transaction until the start
of the ACK packet returned by the SIE. The CPU should not clear this bit during this interval, and subsequently, until the
CPU first does an IORD to this endpoint 0 mode register. The bit must be cleared by firmware as part of the USB
processing.[4]
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Bits[6:0] of the endpoint 0 mode register are locked from CPU write operations whenever the SIE has updated one of these bits,
which the SIE does only at the end of the token phase of a transaction (SETUP... Data... ACK, OUT... Data... ACK, or IN... Data...
ACK). The CPU can unlock these bits by doing a subsequent read of this register. Only endpoint 0 mode registers are locked
when updated. The locking mechanism does not apply to the mode registers of other endpoints.
Because of these hardware locking features, firmware must perform an IORD after an IOWR to an endpoint 0 register. This verifies
that the contents have changed as desired, and that the SIE has not updated these values.
While the SETUP bit is set, the CPU cannot write to the endpoint zero FIFOs. This prevents firmware from overwriting an incoming
SETUP transaction before firmware has a chance to read the SETUP data. Refer to Table 17-1 for the appropriate endpoint zero
memory locations.
The Mode bits (bits [3:0]) control how the endpoint responds to USB bus traffic. The mode bit encoding is shown in Table 18-1.
Additional information on the mode bits can be found in Table 18-2 and Table 18-3.[5]
17.4
USB Non-control Endpoint Mode Registers
The format of the non-control endpoint mode registers is shown in Figure 17-3.
USB Non-control Device Endpoint Mode
Addresses 0x14, 0x16, 0x44
Bit #
7
STALL
R/W
0
6
Reserved
R/W
5
Reserved
R/W
4
3
2
1
0
Bit Name
Read/Write
Reset
ACK
R/W
0
Mode Bit 3 Mode Bit 2 Mode Bit 1 Mode Bit 0
R/W
0
R/W
0
R/W
0
R/W
0
0
0
Figure 17-3. USB Non-control Device Endpoint Mode Registers
Bits[3..0] : Mode.
These sets the mode which control how the control endpoint responds to traffic. The mode bit encoding is shown in
Table 18-1.
Bit 4 : ACK.
This bit is set whenever the SIE engages in a transaction to the register’s endpoint that completes with an ACK packet.
Bits[6..5]: Reserved.
Must be written zero during register writes.
Bit 7: STALL.
If this STALL is set, the SIE stalls an OUT packet if the mode bits are set to ACK-IN, and the SIE stalls an IN packet if the
mode bits are set to ACK-OUT. For all other modes, the STALL bit must be a LOW.
17.5
USB Endpoint Counter Registers
There are five Endpoint Counter registers, with identical formats for both control and non-control endpoints. These registers
contain byte count information for USB transactions, as well as bits for data packet status. The format of these registers is shown
in Figure 17-4.
USB Endpoint Counter
Addresses 0x11, 0x13, 0x15, 0x41, 0x43
Bit #
7
6
5
4
3
2
1
0
Bit Name
Data 0/1
Toggle
Data Valid Byte Count Byte Count Byte Count Byte Count Byte Count Byte Count
Bit 5
R/W
0
Bit 4
R/W
0
Bit 3
R/W
0
Bit 2
R/W
0
Bit 1
R/W
0
Bit 0
R/W
0
Read/Write
Reset
R/W
0
R/W
0
Figure 17-4. USB Endpoint Counter Registers
Bits[5..0]: Byte Count.
Notes:
4. In 5-endpoint mode (USB Status And Control Register Bits [7,6] are set to [0,1] or [1,1]), Register 0x42 serves as non-control endpoint 3, and has the format for
non-control endpoints shown in Figure 17-3.
5. The SIE offers an “Ack out – Status in” mode and not an “Ack out – Nak in” mode. Therefore, if following the status stage of a Control Write transfer a USB host
were to immediately start the next transfer, the new Setup packet could override the data payload of the data stage of the previous Control Write.
These counter bits indicate the number of data bytes in a transaction. For IN transactions, firmware loads the count with
the number of bytes to be transmitted to the host from the endpoint FIFO. Valid values are 0 to 32, inclusive. For OUT or
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SETUP transactions, the count is updated by hardware to the number of data bytes received, plus two for the CRC bytes.
Valid values are 2 to 34, inclusive.
Bit 6: Data Valid.
This bit is set on receiving a proper CRC when the endpoint FIFO buffer is loaded with data during transactions. This bit is
used OUT and SETUP tokens only. If the CRC is not correct, the endpoint interrupt occurs, but Data Valid is cleared to a
zero.
Bit 7: Data 0/1 Toggle.
This bit selects the DATA packet’s toggle state: 0 for DATA0, 1 for DATA1. For IN transactions, firmware must set this bit to
the desired state. For OUT or SETUP transactions, the hardware sets this bit to the state of the received Data Toggle bit.
Whenever the count updates from a SETUP or OUT transaction on endpoint 0, the counter register locks and cannot be written
by the CPU. Reading the register unlocks it. This prevents firmware from overwriting a status update on incoming SETUP or OUT
transactions before firmware has a chance to read the data. Only endpoint 0 counter register is locked when updated. The locking
mechanism does not apply to the count registers of other endpoints.
17.6
Endpoint Mode/Count Registers Update and Locking Mechanism
The contents of the endpoint mode and counter registers are updated, based on the packet flow diagram in Figure 17-5. Two
time points, SETUP and UPDATE, are shown in the same figure. The following activities occur at each time point:
SETUP:
The SETUP bit of the endpoint 0 mode register is forced HIGH at this time. This bit is forced HIGH by the SIE until the end of the
data phase of a control write transfer. The SETUP bit can not be cleared by firmware during this time.
The affected mode and counter registers of endpoint 0 are locked from any CPU writes once they are updated. These registers
can be unlocked by a CPU read, only if the read operation occurs after the UPDATE. The firmware needs to perform a register
read as a part of the endpoint ISR processing to unlock the effected registers. The locking mechanism on mode and counter
registers ensures that the firmware recognizes the changes that the SIE might have made since the previous IO read of that
register.
UPDATE:
1. Endpoint Mode Register – All the bits are updated (except the SETUP bit of the endpoint 0 mode register).
2. Counter Registers – All bits are updated.
3. Interrupt – If an interrupt is to be generated as a result of the transaction, the interrupt flag for the corresponding endpoint is
set at this time. For details on what conditions are required to generate an endpoint interrupt, refer to Table 18-2.
4. The contents of the updated endpoint 0 mode and counter registers are locked, except the SETUP bit of the endpoint 0 mode
register which was locked earlier.
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1. IN Token
Host To Device
Device To Host
Host To Device
D
A
T
A
S
Y
N
C
A
D
D
R
E
N
D
P
C
R
C
5
S
Y
N
C
C
R
C
S
A
Y
C
N
K
C
IN
Data
16
1/0
Hand
Shake
Packet
Token Packet
Data Packet
UPDATE
Host To Device
Device To Host
S
Y
N
C
A
D
D
R
E
N
D
P
C
R
C
5
S
Y
N
C
IN
NAK/STALL
D
E
V
I
C
E
Token Packet
Data Packet
H
O
S
T
UPDATE
2. OUT or SETUP Token without CRC error
Device To Host
Host To Device
Host To Device
O
U
T
D
A
S
Y
N
C
A
D
D
R
E
N
D
P
C
R
C
5
S
Y
N
C
C
R
C
S
Y
N
C
ACK,
NAK,
STAL
T
A
Data
/
Set
up
16
1/0
Hand
Shake
Packet
Token Packet
Data Packet
UPDATE
SETUP
3. OUT or SETUP Token with CRC error
Host To Device
Host To Device
O
U
T
D
A
T
A
1/0
S
Y
N
C
A
D
D
R
E
N
D
P
C
R
C
5
S
Y
N
C
C
R
C
Data
/
Set
up
16
Token Packet
Data Packet
UPDATE only if FIFO is
written
Figure 17-5. Token/Data Packet Flow Diagram
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18.0
USB Mode Tables
Table 18-1. USB Register Mode Encoding
Mode
Moder
Disable
Bits SETUP
0000 ignore
0001 accept
0010 accept
0011 accept
IN
OUT
Comments
ignore ignore Ignore all USB traffic to this endpoint
Nak In/Out
NAK
stall
stall
NAK Forced from Setup on Control endpoint, from modes other than 0000
check For Control endpoints
Status Out Only
Stall In/Out
stall For Control endpoints
Ignore In/Out
Isochronous Out
0100 accept ignore ignore For Control endpoints
0101 ignore
ignore alway For Isochronous endpoints
s
Status In Only
0110 accept
TX 0
BYte
stall For Control Endpoints
Isochronous In
Nak Out
0111 ignore TX Count ignore For Isochronous endpoints
1000 ignore
ignore
NAK Is set by SIE on an ACK from mode 1001 (Ack Out)
Ack Out(STALL[6]=0) 1001 ignore
ignore
ignore
ACK On issuance of an ACK this mode is changed by SIE to 1000 (NAK
stall Out)
AckOut(STALL[6]=1) 1001 ignore
Nak Out - Status In
Ack Out - Status In
Nak In
1010 accept
1011 accept
1100 ignore
TX 0
BYte
NAK Is set by SIE on an ACK from mode 1011 (Ack Out – Status In)
TX 0
BYte
ACK On issuance of an ACK this mode is changed by SIE to 1010 (NAK
Out – Status In)
NAK
ignore Is set by SIE on an ACK from mode 1101 (Ack In)
Ack IN(STALL[6]=0) 1101 ignore TX Count ignore On issuance of an ACK this mode is changed by SIE to 1100 (NAK In)
Ack IN(STALL[6]=1) 1101 ignore
stall
ignore
Nak In - Status Out
Ack In - Status Out
1110 accept
NAK
check Is set by SIE on an ACK from mode 1111 (Ack In – Status Out)
1111 accept TX Count check On issuance of an ACK this mode is changed by SIE to 1110 (NAK In
– Status Out)
Mode
This lists the mnemonic given to the different modes that can be set in the Endpoint Mode Register by writing to the lower nibble
(bits 0..3). The bit settings for different modes are covered in the column marked “Mode Bits”. The Status IN and Status OUT
represent the Status stage in the IN or OUT transfer involving the control endpoint.
Mode Bits
These column lists the encoding for different modes by setting Bits[3..0] of the Endpoint Mode register. This modes represents
how the SIE responds to different tokens sent by the host to an endpoint. For instance, if the mode bits are set to “0001” (NAK
IN/OUT), the SIE will respond with an
• ACK on receiving a SETUP token from the host.
• NAK on receiving an OUT token from the host.
• NAK on receiving an IN token from the host.
Refer to section 13.0 for more information on the SIE functioning.
SETUP, IN, and OUT
These columns shows the SIE’s response to the host on receiving a SETUP, IN and OUT token depending on the mode set in
the Endpoint Mode Register.
A “Check” on the OUT token column, implies that on receiving an OUT token the SIE checks to see whether the OUT packet is
of zero length and has a Data Toggle (DTOG) set to ‘1.’ If the DTOG bit is set and the received OUT Packet has zero length, the
OUT is ACKed to complete the transaction. If either of this condition is not met the SIE will respond with a STALLL or just ignore
the transaction.
A “TX Count” entry in the IN column implies that the SIE transmit the number of bytes specified in the Byte Count (bits 3..0 of the
Endpoint Count Register) to the host in response to the IN token received.
Note:
6. STALL bit is bit 7 of the USB Non-control Device Endpoint Mode registers. For more information, refer to Section 17.4.
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A “TX0 Byte” entry in the IN column implies that the SIE transmit a zero length byte packet in response to the IN token received
from the host.
An “Ignore” in any of the columns means that the device will not send any handshake tokens (no ACK) to the host.
An “Accept” in any of the columns means that the device will respond with an ACK to a valid SETUP transaction tot he host.
Comments
Some Mode Bits are automatically changed by the SIE in response to certain USB transactions. For example, if the Mode Bits
[3:0] are set to '1111' which is ACK IN-Status OUT mode as shown in Table 18-1, the SIE will change the endpoint Mode Bits [3:0]
to NAK IN-Status OUT mode (1110) after ACK’ing a valid status stage OUT token. The firmware needs to update the mode for
the SIE to respond appropriately. See Table 18-1 for more details on what modes will be changed by the SIE. A disabled endpoint
will remain disabled until changed by firmware, and all endpoints reset to the disabled mode (0000). Firmware normally enables
the endpoint mode after a SetConfiguration request.
Any SETUP packet to an enabled endpoint with mode set to accept SETUPs will be changed by the SIE to 0001 (NAKing INs
and OUTs). Any mode set to accept a SETUP will send an ACK handshake to a valid SETUP token.
The control endpoint has three status bits for identifying the token type received (SETUP, IN, or OUT), but the endpoint must be
placed in the correct mode to function as such. Non-control endpoints should not be placed into modes that accept SETUPs.
Note that most modes that control transactions involving an ending ACK, are changed by the SIE to a corresponding mode which
NAKs subsequent packets following the ACK. Exceptions are modes 1010 and 1110
.
Table 18-2. Decode table for Table 18-3: “Details of Modes for Differing Traffic Conditions”
Properties of Incoming
Packets
Changes to the Internal Register made by the SIE on receiving an incoming packet
from the host
Interrupt
3
2
1
0
Token
count
buffer
dval
DTOG
DVAL
COUNT
Setup
In
Out
ACK
3
2
1
0
Response Int
Byte Count (bits 0..5, Figure 17-4)
Data Valid (bit 6, Figure 17-4)
Endpoint Mode
encoding
SIE’s Response
to the Host
Received Token
(SETUP/IN/OUT)
Data0/1 (bit7 Figure 17-4)
PID Status Bits
(Bit[7..5], Figure 17-2)
Endpoint Mode bits
Changed by the SIE
The validity of the received data
The quality status of the DMA buffer
The number of received bytes
Acknowledge phase completed
Legend:
TX : transmit
RX : receive
UC : unchanged
TX0 :Transmit 0 length packet
available for Control endpoint only
x: don’t care
The response of the SIE can be summarized as follows:
1. The SIE will only respond to valid transactions, and will ignore non-valid ones.
2. The SIE will generate an interrupt when a valid transaction is completed or when the FIFO is corrupted. FIFO corruption occurs
during an OUT or SETUP transaction to a valid internal address, that ends with a non-valid CRC.
3. An incoming Data packet is valid if the count is < Endpoint Size + 2 (includes CRC) and passes all error checking;
4. An IN will be ignored by an OUT configured endpoint and visa versa.
5. The IN and OUT PID status is updated at the end of a transaction.
6. The SETUP PID status is updated at the beginning of the Data packet phase.
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7. The entire Endpoint 0 mode register and the Count register are locked to CPU writes at the end of any transaction to that
endpoint in which an ACK is transferred. These registers are only unlocked by a CPU read of the register, which should be
done by the firmware only after the transaction is complete. This represents about a 1-µs window in which the CPU is locked
from register writes to these USB registers. Normally the firmware should perform a register read at the beginning of the
Endpoint ISRs to unlock and get the mode register information. The interlock on the Mode and Count registers ensures that
the firmware recognizes the changes that the SIE might have made during the previous transaction. Note that the setup bit of
the mode register is NOT locked. This means that before writing to the mode register, firmware must first read the register to
make sure that the setup bit is not set (which indicates a setup was received, while processing the current USB request). This
read will of course unlock the register. So care must be taken not to overwrite the register elsewhere
.
Table 18-3. Details of Modes for Differing Traffic Conditions (see Table 18-2 for the decode legend)
SETUP (if accepting SETUPs)
Properties of Incoming Packet
Changes made by SIE to Internal Registers and Mode Bits
Mode Bits
token
count buffer
dval
valid
x
DTOG
DVAL
COUNT Setup
In
Out ACK
Mode Bits Response
ACK
Intr
yes
yes
yes
See Table 18-1 Setup
See Table 18-1 Setup
See Table 18-1 Setup
<= 10 data
updates
1
updates
1
1
1
UC UC
UC UC
UC UC
1
0
0 0 1
> 10
x
junk
junk
updates updates updates
updates updates
UC
UC
NoChange ignore
NoChange ignore
invalid
0
Properties of Incoming Packet
Changes made by SIE to Internal Registers and Mode Bits
Mode Bits
token
count buffer
dval
DTOG
DVAL
COUNT Setup
In
Out ACK
Mode Bits Response
Intr
DISABLED
0
0
0
0
x
x
UC
x
UC
UC
UC
UC
UC UC
UC
NoChange ignore
no
Nak In/Out
0
0
0
0
0
0
1
1
Out
In
x
x
UC
UC
x
x
UC
UC
UC
UC
UC
UC
UC
UC
UC
1
1
UC
UC
NoChange NAK
NoChange NAK
yes
yes
UC
Ignore In/Out
0
0
1
1
0
0
0
0
Out
In
x
x
UC
UC
x
x
UC
UC
UC
UC
UC
UC
UC
UC
UC UC
UC UC
UC
UC
NoChange ignore
NoChange ignore
no
no
Stall In/Out
0
0
0
0
1
1
1
1
Out
In
x
x
UC
UC
x
x
UC
UC
UC
UC
UC
UC
UC
UC
UC
1
1
UC
UC
NoChange Stall
NoChange Stall
yes
yes
UC
CONTROL WRITE
Properties of Incoming Packet
Mode Bits token count buffer
Normal Out/premature status In
Changes made by SIE to Internal Registers and Mode Bits
dval
DTOG
DVAL
COUNT Setup
In
Out ACK
Mode Bits Response
Intr
1
1
1
1
0
0
0
0
1
1
1
1
1
1
1
1
Out
Out
Out
In
<= 10 data
valid
updates
1
updates UC
UC
UC
UC
1
1
1
1
0
1
0
ACK
yes
yes
yes
yes
> 10
junk
junk
UC
x
updates updates updates UC
1
UC
UC
1
NoChange ignore
NoChange ignore
NoChange TX 0
x
x
invalid
x
updates
UC
0
updates UC
1
UC
UC
UC
UC
NAK Out/premature status In
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
Out
Out
Out
In
<= 10 UC
valid
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
1
UC
UC
UC
1
NoChange NAK
NoChange ignore
NoChange ignore
NoChange TX 0
yes
no
> 10
UC
UC
UC
x
UC UC
UC UC
x
x
invalid
x
no
1
UC
yes
Status In/extra Out
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
Out
Out
Out
In
<= 10 UC
valid
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
1
UC
UC
UC
1
0
0
1
1
Stall
yes
no
> 10
UC
UC
UC
x
UC UC
UC UC
NoChange ignore
NoChange ignore
NoChange TX 0
x
x
invalid
x
no
1
UC
yes
CONTROL READ
Properties of Incoming Packet
Mode Bits token count buffer
Normal In/premature status Out
Changes made by SIE to Internal Registers and Mode Bits
dval
DTOG
DVAL
COUNT Setup
In
Out ACK
Mode Bits Response
Intr
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Out
Out
Out
Out
Out
In
2
UC
UC
UC
UC
UC
UC
valid
valid
valid
x
1
1
updates UC
updates UC
updates UC
UC
UC
UC
1
1
1
1
NoChange ACK
yes
yes
yes
no
2
0
1
UC
UC
UC
UC
1
0
0
0
0
1
1
1
1
Stall
Stall
!=2
> 10
x
updates
UC
1
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC UC
UC UC
NoChange ignore
NoChange ignore
invalid
x
UC
no
x
UC
1
UC
1
1
1
0
ACK (back)
yes
Document #: 38-08002 Rev. *B
Page 43 of 51
CY7C65013
CY7C65113
Table 18-3. Details of Modes for Differing Traffic Conditions (see Table 18-2 for the decode legend) (continued)
Nak In/premature status Out
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
Out
Out
Out
Out
Out
In
2
UC
UC
UC
UC
UC
UC
valid
valid
valid
x
1
1
updates UC
updates UC
updates UC
UC
UC
UC
1
1
1
1
NoChange ACK
yes
yes
yes
no
2
0
1
UC
UC
UC
UC
UC
0
0
0
0
1
1
1
1
Stall
Stall
!=2
> 10
x
updates
UC
1
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC UC
UC UC
NoChange ignore
NoChange ignore
NoChange NAK
invalid
x
UC
no
x
UC
1
UC
yes
Status Out/extra In
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
Out
Out
Out
Out
Out
In
2
UC
UC
UC
UC
UC
UC
valid
valid
valid
x
1
1
updates UC
updates UC
updates UC
UC
UC
UC
1
1
1
1
NoChange ACK
yes
yes
yes
no
2
0
1
UC
UC
UC
UC
UC
0
0
0
0
1
1
1
1
Stall
Stall
!=2
> 10
x
updates
UC
1
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC UC
NoChange ignore
NoChange ignore
invalid
x
UC
1
1
UC
UC
no
x
UC
0
0
1
1
Stall
yes
OUT ENDPOINT
Properties of Incoming Packet
Changes made by SIE to Internal Registers and Mode Bits
Mode Bits
token
count buffer
dval
DTOG
DVAL
COUNT Setup
In
Out ACK
Mode Bits Response
Intr
Normal Out/erroneous In
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
Out
Out
Out
In
<= 10 data
valid
updates
1
updates UC
UC
UC
UC
1
1
1
1
1
0
0
0
ACK
yes
yes
yes
no
> 10
junk
junk
UC
x
updates updates updates UC
UC
UC
UC
NoChange ignore
NoChange ignore
NoChange ignore
x
x
invalid
x
updates
UC
0
updates UC
UC
UC
UC
UC UC
(STALL[6] = 0)
NoChange Stall
(STALL[6] = 1)
1
0
0
1
In
x
UC
x
UC
UC
UC
UC
UC UC
UC
no
NAK Out/erroneous In
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
Out
Out
Out
In
<= 10 UC
valid
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
UC
1
UC
UC
UC
UC
NoChange NAK
NoChange ignore
NoChange ignore
NoChange ignore
yes
no
no
no
> 10
UC
UC
UC
x
UC UC
UC UC
UC UC
x
x
invalid
x
Isochronous endpoint (Out)
0
0
1
1
0
0
1
1
Out
In
x
x
updates updates
updates updates updates UC
UC UC UC UC
UC
1
1
NoChange RX
yes
no
UC
x
UC UC
UC
NoChange ignore
IN ENDPOINT
Properties of Incoming Packet
Mode Bits token count buffer
Normal In/erroneous Out
Changes made by SIE to Internal Registers and Mode Bits
dval
DTOG
DVAL
COUNT Setup
In
Out ACK
Mode Bits Response
Intr
no
1
1
1
1
1
1
0
0
0
1
1
1
Out
Out
In
x
x
x
UC
UC
UC
x
x
x
UC
UC
UC
UC
UC
UC
UC
UC
UC UC
UC UC
UC
UC
1
NoChange ignore
(STALL[6] = 0)
UC
UC
NoChange stall
(STALL[6] = 1)
no
UC
UC
1
UC
1
1
0
0
ACK (back)
yes
NAK In/erroneous Out
1
1
1
1
0
0
0
0
Out
In
x
x
UC
UC
x
x
UC
UC
UC
UC
UC
UC
UC
UC
UC UC
UC
UC
UC
NoChange ignore
NoChange NAK
no
1
yes
Isochronous endpoint (In)
0
0
1
1
1
1
1
1
Out
In
x
x
UC
UC
x
x
UC
UC
UC
UC
UC
UC
UC
UC
UC UC
UC
UC
UC
NoChange ignore
NoChange TX
no
1
yes
Document #: 38-08002 Rev. *B
Page 44 of 51
CY7C65013
CY7C65113
19.0
Register Summary
Address
Register Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Read/Write/B
oth/–[7]
Default/
Reset
0x00
0x01
0x02
0x03
0x04
Port 0 Data
P0.7
P1.7
P2.7
P3.7
P0.6
P1.6
P2.6
P3.6
P0.5
P1.5
P2.5
P3.5
P0.4
P1.4
P2.4
P3.4
P0.3
P1.3
P2.3
P3.3
P0.2
P1.2
P2.2
P3.2
P0.1
P1.1
P2.1
P3.1
P0.0
P1.0
P2.0
P3.0
BBBBBBBB
BBBBBBBB
BBBBBBBB
BBBBBBBB
11111111
11111111
11111111
11111111
Port 1 Data
Port 2 Data
Port 3 Data
Port 0 Interrupt Enable
P0.7 Intr
Enable
P0.6 Intr
Enable
P0.5 Intr
Enable
P0.4 Intr
Enable
P0.3 Intr
Enable
P0.2 Intr
Enable
P0.1 Intr
Enable
P0.0 Intr
Enable
WWWWWWWW 00000000
WWWWWWWW 00000000
WWWWWWWW 00000000
WWWWWWWW 00000000
0x05
0x06
0x07
0x08
Port 1 Interrupt Enable
Port 2 Interrupt Enable
Port 3 Interrupt Enable
GPIO Configuration
P1.7 Intr
Enable
P1.6 Intr
Enable
P1.5 Intr
Enable
P1.4 Intr
Enable
Reserved
P1.2 Intr
Enable
P1.1 Intr
Enable
P1.0 Intr
Enable
P2.7 Intr
Enable
P2.6 Intr
Enable
P2.5 Intr
Enable
P2.4 Intr
Enable
P2.3 Intr
Enable
Reserved
Reserved
Port 1
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
P3.1 Intr
Enable
P3.0 Intr
Enable
Port 3
Port 3
Port 2
Port 2
Port 1
Port 0
Port 0
BBBBBBBB
00000000
Config Bit 1 Config Bit 0 Config Bit 1 Config Bit 0 Config Bit 1 Config Bit 0 Config Bit 1 Config Bit 0
2
2
2
0x09
0x10
HAPI/I C Configuration
I C Position
Reserved
Reserved
Reserved
Reserved
Reserved
I C Port
Reserved
BBBBBBBB
BBBBBBBB
00000000
00000000
Width
USB Device Address A
Device
Address A
Enable
Device
Address A
Bit 6
Device
Address A
Bit 5
Device
Address A
Bit 4
Device
Address A
Bit 3
Device
Address A
Bit 2
Device
Address A
Bit 1
Device
Address A
Bit 0
0x11
0x12
EP A0 Counter
Register
Data 0/1
Toggle
Data Valid
Byte Count Byte Count Byte Count Byte Count Byte Count Byte Count
BBBBBBBB
BBBBBBBB
00000000
00000000
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
EP A0 Mode Register
Endpoint0
SETUP
Received
Endpoint0
IN
Received
Endpoint0
OUT
ACK
Mode Bit 3
Mode Bit 2
Mode Bit 1
Mode Bit 0
Received
0x13
EP A1 Counter
Register
Data 0/1
Toggle
Data Valid
Byte Count Byte Count Byte Count Byte Count Byte Count Byte Count
BBBBBBBB
00000000
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0x14
0x15
EP A1 Mode Register
STALL
-
-
ACK
Mode Bit 3
Mode Bit 2
Mode Bit 1
Mode Bit 0
BBBBBBBB
BBBBBBBB
00000000
00000000
EP A2 Counter
Register
Data 0/1
Toggle
Data Valid
Byte Count Byte Count Byte Count Byte Count Byte Count Byte Count
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0x16
EP A2 Mode Register
STALL
-
-
ACK
Mode Bit 3
Mode Bit 2
Mode Bit 1
Mode Bit 0
BBBBBBBB
00000000
0x1F
0x20
USB Status and Control
Global Interrupt Enable
Endpoint
Size
Endpoint
Mode
D+
D–
Bus Activity
Control
Bit 2
Control
Bit 1
Control
Bit 0
BBRRBBBB
-BBBBBBB
-0xx0000
-0000000
Upstream
Upstream
2
Reserved
I C
GPIO
Interrupt
Enable
Reserved
USB Hub
Interrupt
Enable
1.024-ms
Interrupt
Enable
128-µs
Interrupt
Enable
USB Bus
RESET
Interrupt
Enable
Interrupt
Enable
0x21
Endpoint Interrupt
Enable
Reserved
Reserved
Reserved
EPB1
Interrupt
Enable
EPB0
Interrupt
Enable
EPA2
Interrupt
Enable
EPA1
Interrupt
Enable
EPA0
Interrupt
Enable
---BBBBB
---00000
0x24
0x25
Timer (LSB)
Timer (MSB)
Timer Bit 7
Reserved
Timer Bit 6
Reserved
Timer Bit 5
Reserved
Timer Bit 4
Reserved
Timer Bit 3
Timer Bit 2
Timer Bit 1
Timer Bit 0
Timer Bit 8
RRRRRRRR
----rrrr
00000000
----0000
Timer Bit 11 Timer Bit 10 Time Bit 9
2
2
0x28
I C Control and Status
MSTR
Mode
Continue/
Busy
Xmit
Mode
ACK
Addr
ARB Lost/
Restart
Received
Stop
I C
BBBBBBBB
00000000
Enable
2
2
2
2
2
2
2
2
2
0x29
0x40
I C Data
I C Data 7
I C Data 6
I C Data 5
I C Data 4
I C Data 3
I C Data 2
I C Data 1
I C Data 0
BBBBBBBB
BBBBBBBB
XXXXXXXX
00000000
USB Device Address B
Device
Address B
Enable
Device
Address B
Bit 6
Device
Address B
Bit 5
Device
Address B
Bit 4
Device
Address B
Bit 3
Device
Address B
Bit 2
Device
Address B
Bit 1
Device
Address B
Bit 0
0x41
0x42
EP B0 Counter Register
EP B0 Mode Register
Data 0/1
Toggle
Data Valid
Byte Count Byte Count Byte Count Byte Count Byte Count Byte Count
BBBBBBBB
BBBBBBBB
00000000
00000000
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Endpoint 0
SETUP
Received
Endpoint 0
IN
Received
Endpoint 0
OUT
ACK
Mode Bit 3
Mode Bit 2
Mode Bit 1
Mode Bit 0
Received
0x43
0x44
EP B1 Counter Register
EP B1 Mode Register
Data 0/1
Toggle
Data Valid
Byte Count Byte Count Byte Count Byte Count Byte Count Byte Count
BBBBBBBB
BBBBBBBB
00000000
00000000
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
STALL
-
-
ACK
Mode Bit 3
Mode Bit 2
Mode Bit 1
Mode Bit 0
Note:
7. B: Read and Write; W: Write; R: Read.
Document #: 38-08002 Rev. *B
Page 45 of 51
CY7C65013
CY7C65113
19.0
Register Summary (continued)
Address
Register Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Read/Write/B
oth/–[7]
Default/
Reset
0x48
Hub Port Connect Status
Reserved
Port 7
Connect
Status
Port 6
Connect
Status
Port 5
Connect
Status
Port 4
Connect
Status
Port 3
Connect
Status
Port 2
Connect
Status
Port 1
Connect
Status
BBBBBBBB
00000000
0x49
0x4A
0x4B
0x4C
0x4D
Hub Port Enable
Hub Port Speed
Reserved
Reserved
Port 4
Port 7
Port 6
Port 5
Port 4
Port 3
Port 2
Port 1
BBBBBBBB
BBBBBBBB
BBBBBBBB
--BBBBBB
BBBBBBBB
00000000
00000000
00000000
--000000
00000000
Enable
Enable
Enable
Enable
Enable
Enable
Enable
Port 7
Speed
Port 6
Speed
Port 5
Speed
Port 4
Speed
Port 3
Speed
Port 2
Speed
Port 1
Speed
Hub Port Control (Ports
4:1)
Port 4
Port 3
Port 3
Port 2
Port 2
Port 1
Port 1
Control Bit 1 Control Bit 0 Control Bit 1 Control Bit 0 Control Bit 1 Control Bit 0 Control Bit 1 Control Bit 0
Hub Port Control (Ports
7:5)
Reserved
Reserved
Port 7
Port 7
Port 6
Port 6
Port 5
Port 5
Control Bit 1 Control Bit 0 Control Bit 1 Control Bit 0 Control Bit 1 Control Bit 0
Hub Port Suspend
Device
Remote
Wakeup
Port 7
Selective
Suspend
Port 6
Selective
Suspend
Port 5
Selective
Suspend
Port 4
Selective
Suspend
Port 3
Selective
Suspend
Port 2
Selective
Suspend
Port 1
Selective
Suspend
0x4E
0x4F
Hub Port Resume Status
Hub Port SE0 Status
Reserved
Reserved
Resume 7
Resume 6
Resume 5
Resume 4
Resume 3
Resume 2
Resume 1
-RRRRRRR
RRRRRRRR
00000000
00000000
Port 7
Port 6
Port 5
Port 4
Port 3
Port 2
Port 1
SE0 Status SE0 Status SE0 Status SE0 Status SE0 Status SE0 Status SE0 Status
0x50
0x51
0x52
Hub Ports Data
Reserved
Port 7
Port 6
Port 5
Port 4
Port 3
Port 2
Port 1
RRRRRRRR
BBBBBBBB
--BBBBBB
00000000
00000000
00000000
Diff. Data
Diff. Data
Diff. Data
Diff. Data
Diff. Data
Diff. Data
Diff. Data
Hub Port Force Low
(Ports 4:1)
Force Low
D+[4]
Force Low
D–[4]
Force Low
D+[3]
Force Low
D–[3]
Force Low
D+[2]
Force Low
D–[2]
Force Low
D+[1]
Force Low
D–[1]
Hub Port Force Low
(Ports 7:5)
Reserved
Reserved
Force Low
D+[7]
Force Low
D–[7]
Force Low
D+[6]
Force Low
D–[6]
Force Low
D+[5]
Force Low
D–[5]
0xFF
Process Status & Control
IRQ
Pending
Watchdog
Reset
USB Bus
Reset
Interrupt
Power-on
Reset
Suspend
Interrupt
Enable
Sense
Reserved
Run
RBBBBRBB
00010001
Document #: 38-08002 Rev. *B
Page 46 of 51
CY7C65013
CY7C65113
20.0
Sample Schematic
USB-A
Vbus
D-
D+
GND
3.3v Regulator
Vref
OUT
IN
2.2 uF
Vref
2.2 uF
1.5K
(RUUP
)
USB-B
.01 uF
.01 uF
Vbus
Vbus
D-
22x2(Rext
)
D+
GND
USB-A
Vbus
D-
D+
GND
22x8(Rext
)
SHELL
D0-
D0+
D1-
D1+
4.7nF
250 VAC
Optional
D2-
XTALO
XTALI
D2+
10M
D3-
6.000 MHz
D3+
GND
GND
Vpp
D4-
USB-A
Vbus
D-
D4+
D+
GND
15K(x8)
(RUDN
)
USB-A
Vbus
D-
POWER
MANAGEMENT
D+
GND
21.0
Absolute Maximum Ratings
Storage Temperature ................................................................................................................................... –65°C to +150°C
Ambient Temperature with Power Applied.......................................................................................................... 0°C to +70°C
Supply voltage on VCC relative to VSS..............................................................................................................–0.5V to +7.0V
DC Input Voltage................................................................................................................................... –0.5V to +VCC + 0.5V
DC Voltage applied to Outputs in High Z State..................................................................................... –0.5V to +VCC + 0.5V
Power Dissipation ....................................................................................................................................................... 500 mW
Static Discharge Voltage ............................................................................................................................................> 2000V
Latch-up Current ..................................................................................................................................................... > 200 mA
Max Output Sink Current into Port 0, 1, 2, 3 ................................................................................................................ 60 mA
Max Output Sink Current into DAC[7:2] Pins................................................................................................................ 10 mA
Max Output Source Current from Port 1, 2, 3, 4, 5, 6, 7 .............................................................................................. 30 mA
Document #: 38-08002 Rev. *B
Page 47 of 51
CY7C65013
CY7C65113
22.0
Electrical Characteristics
fOSC = 6 MHz; Operating Temperature = 0 to 70°C, VCC = 4.0V to 5.25V
Parameter
Description
Conditions
Min.
Max.
Unit
General
VREF
Vpp
ICC
Reference Voltage
3.3V ±5%
3.15
–0.4
3.45
0.4
50
50
10
1
V
Programming Voltage (disabled)
VCC Operating Current
V
No GPIO source current
mA
µA
mA
µA
ISB1
Iref
Supply Current—Suspend Mode
VREF Operating Current
No USB Traffic[8]
Any pin
Iil
Input Leakage Current
USB Interface
| (D+)–(D–) |
Vdi
Differential Input Sensitivity
0.2
0.8
0.8
V
V
Vcm
Vse
Differential Input Common Mode Range
Single Ended Receiver Threshold
Transceiver Capacitance
2.5
2.0
20
V
Cin
pF
µA
Ω
Ilo
Hi-Z State Data Line Leakage
External USB Series Resistor
0V < Vin < 3.3V
–10
19
10
Rext
RUUP
RUDN
In series with each USB pin
21
External Upstream USB Pull-up Resistor 1.5 kΩ ±5%, D+ to VREG
1.425 1.575
14.25 15.75
kΩ
kΩ
External Downstream Pull-down Resistors 15 kΩ ±5%, downstream USB pins
Power-on Reset
[9]
tvccs
VCC Ramp Rate
Linear ramp 0V to VCC
USB Upstream/Downstream Port
15 kΩ ±5% to Gnd
0
100
ms
VUOH
VUOL
ZO
Static Output High
2.8
28
3.6
0.3
44
V
V
Ω
Static Output Low
1.5 kΩ ±5% to VREF
USB Driver Output Impedance
Including Rext Resistor
General Purpose I/O (GPIO)
Rup
VITH
VH
Pull-up Resistance (typical 14 kΩ)
Input Threshold Voltage
8.0
20%
2%
24.0
40%
8%
kΩ
All ports, low-to-high edge
All ports, high-to-low edge
VCC
VCC
Input Hysteresis Voltage
VOL
Port 0,1,2,3 Output Low Voltage
IOL = 3 mA
IOL = 8 mA
0.4
2.0
V
V
VOH
Output High Voltage
IOH = 1.9 mA (all ports 0,1,2,3)
2.4
V
23.0
Switching Characteristics (fOSC = 6.0 MHz)
Parameter
Description
Clock Source
Min.
Max.
Unit
fOSC
tcyc
tCH
tCL
Clock Rate
6 ±0.25%
166.25
MHz
ns
Clock Period
167.08
Clock HIGH time
Clock LOW time
0.45 tCYC
0.45 tCYC
ns
ns
USB Full-speed Signaling[10]
trfs
tffs
Transition Rise Time
Transition Fall Time
4
4
20
20
ns
ns
%
trfmfs
Rise/Fall Time Matching; (tr/tf)
90
111
Notes:
8. Add 18 mA per driven USB cable (upstream or downstream. This is based on transitions every 2 full-speed bit times on average.
9. Power-on Reset occurs whenever the voltage on VCC is below approximately 2.5V.
10. Per Table 7-6 of revision 1.1 of USB specification.
Document #: 38-08002 Rev. *B
Page 48 of 51
CY7C65013
CY7C65113
23.0
Switching Characteristics (fOSC = 6.0 MHz) (continued)
tdratefs
Full Speed Date Rate
Timer Signals
12 ±0.25%
8.192
Mb/s
twatch
Watchdog Timer Period
14.336
ms
tCYC
tCH
CLOCK
tCL
tr
tr
D+
90%
90%
10%
10%
D−
24.0
Ordering Information
Ordering Code
PROM Size
8 KB
Package Name
Package Type
Operating Range
Commercial
CY7C65013-PVC
CY7C65113-SC
CY7C65013-PC
CY7C65113-PC
O48
S21
P25
P21
48-pin (300-Mil) SSOP
28-pin SOIC
8 KB
Commercial
8 KB
48-pin (600 Mil) PDIP
28-pin (300-Mil) PDIP
Commercial
8 KB
Commercial
25.0
Package Diagrams
48-lead Shrunk Small Outline Package O48
51-85061-*C
Document #: 38-08002 Rev. *B
Page 49 of 51
CY7C65013
CY7C65113
25.0
Package Diagrams (continued)
28-lead (300-Mil) Molded DIP P21
51-85014-*B
48-lead (600-Mil) Molded DIP P25
51-85020-*A
28-lead (300-Mil) Molded SOIC S21
51-85026-*A
Purchase of I2C components from Cypress, or one of its sublicensed Associated Companies, conveys a license under the Philips
I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification
as defined by Philips. All product and company names mentioned in this document are the trademarks of their respective holders.
Document #: 38-08002 Rev. *B
Page 50 of 51
© Cypress Semiconductor Corporation, 2003. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use
of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize
its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress
Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges.
CY7C65013
CY7C65113
Document History Page
Document Title: CY7C65013/CY7C65113 USB Hub with Microcontroller
Document Number: 38-08002
Orig. of
REV.
**
ECN NO. Issue Date Change
Description of Change
109965
120372
02/22/02
12/17/02
SZV
Change from Spec number: 38-00590 to 38-08002
*A
MON
Added register bit definitions.
Added default bit state of each register.
Corrected the Schematic (location of the pull-up on D+).
Corrected the Logical Diagram (removed the extra GPIO Port 1).
Added register summary.
Modified Figure 17-5, more labeling.
Removed information on the availability of the part in PDIP package.
Modified Table 18-1 and provided more explanation regarding
locking/unlocking mechanism of the mode register.
Removed any information regarding the speed detect bit in Hub Port Speed
register being set by hardware.
*B
124522
03/13/03
MON
Fixed the figure on page 42 regarding the update of mode registers. The
arrows in the figure were misplaced and the figure was unreadable. This is
an important figure for understanding mode register functioning.
Document #: 38-08002 Rev. *B
Page 51 of 51
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