PC87382-VBH/NOPB [WINBOND]
Microprocessor Circuit, CMOS, PQFP48, PLASTIC, LQFP-48;
| 型号： | PC87382-VBH/NOPB |
| 厂家： | 
WINBOND |
| 描述： | Microprocessor Circuit, CMOS, PQFP48, PLASTIC, LQFP-48 外围集成电路 |
| 文件： | 总72页 (文件大小：783K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
December 2003
Revision 1.2
PC87382
LPC-to-LPC Switch for Docking Stations, with Fast
Infrared Port, Serial Port and GPIOs
General Description
Outstanding Features
ꢀ
The PC87382, a member of the National Semiconductor LPC
SuperI/O family, is targeted for a wide range of portable ap-
plications. The PC87382 is PC2001 and ACPI compliant, and
features an LPC-to-LPC Switch with hot plugability, Fast In-
frared port (FIR, IrDA 1.1 compliant), Serial Port, and Gener-
al-Purpose Input/Output (GPIO) support for a total of eight
ports.
LPC-to-LPC Switch with hot plugability, enables LPC
devices in the Docking Station to be connected to the
Main LPC Bus, thus reducing the number of signals re-
quired through the Docking Station connector
ꢀ
LPC bus interface, based on Intel’s LPC Interface
Specification Revision 1.1, August 2002 (supports
CLKRUN signal)
ꢀ
The PC87382 enables glueless implementation of an LPC-
to-LPC Switch between the motherboard LPC bus and the
Docking Station, and supports hot insertion and hot removal.
Fast Infrared port
ꢀ
PC2001 and ACPI Revision 2.0 compliant
ꢀ
Serial IRQ support (15 options)
ꢀ
Protection features, including GPIO lock and pin con-
figuration lock
ꢀ
Eight GPIO ports, including with “assert IRQ” capability
ꢀ
XOR Tree and TRI-STATE device pins (or ICT) test-
ability modes.
ꢀ
5V tolerant and back-drive protected pins (except LPC
bus pins)
ꢀ
48-pin LQFP package
System Block Diagram
Docking
Station
Portable
Platform
I/O
Ports
South Bridge
LPC Bus
Docking LPC Bus
PC87382
DCLKOUT
Docking
SIO
Embedded
Controller
TPM
Serial
Infrared
Interface Interface
National Semiconductor and TRI-STATE are registered trademarks of National Semiconductor Corporation.
All other brand or product names are trademarks or registered trademarks of their respective holders.
©2003 National Semiconductor Corporation
www.national.com
Features
• LPC System Interface
• Eight General-Purpose I/O (GPIO) Ports
— 8-bit I/O cycles
— Support assert IRQ
— CLKRUN support
— Programmable drive type for each output pin (open-
drain, push-pull or output disable)
— Implements PCI mobile design guide recommenda-
tion (PCI Mobile Design Guide 1.1, Dec. 18, 1998)
— Programmable option for internal pull-up resistor on
each input pin
• LPC-to-LPC Switch
— Output lock option
— Hot plugability
— Input debounce mechanism
— CLKRUN support
• Serial Port (SP1)
— The connection is controlled by software
— Low switch resistance and propagation delay
— Programmable Clock to Reset Delay
— Software compatible with the 16550A and the 16450
— Shadow register support for write-only bit monitoring
— UART data rates up to 1.5 Mbaud
• PC2001 and ACPI Compliant
• Fast Infrared Port (FIR)
— PnP Configuration Register structure
— Flexible resource allocation for all logical devices
ꢀ Relocatable base address
— Software compatible with the 16550A and the 16450
— Shadow register support for write-only bit monitoring
— FIR IrDA 1.1 compliant
ꢀ 15 IRQ routing options
— HP-SIR
ꢀ Two optional 8-bit DMA channels (where applica-
— ASK-IR option of SHARP-IR
ble) selected from four possible DMA channels
— DASK-IR option of SHARP-IR
• Clock Sources
— Consumer Remote Control supports RC-5, RC-6,
— 14.318 MHz or 48 MHz clock input
NEC, RCA and RECS 80
— LPC clock, up to 33 MHz
— DMA support: 1 or 2 channels
— 14.318 MHz or 48 MHz clock output to the docking
• Strap Configuration
station
— Base Address (BADDR) strap to determine the base
• Power Supply
address of the Index-Data register pair
— 3.3V supply operation
— Strap Inputs to select testability mode
— All pins are 5V tolerant, except LPC bus pins
— All pins are back-drive protected, except LPC bus pins
• Testability
— XOR Tree
— TRI-STATE device pins
Internal Block Diagram
LPC Interface
14.31818 MHz
Clock
Generator
Bus
Interface
Docking
LPC Switch
48 MHz
FIR
GPIO Ports
Serial Port 1
Ports
I/O
Infrared
Interface
Docking LPC
Interface
Serial
Interface
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2
Revision1.2
Revision Record
Revision Date
Status
Draft 0.1
Comments
February 2003
March 2003
March 2003
April 2003
Specification subject to change without notice.
Specification subject to change without notice.
Specification subject to change without notice.
Specification subject to change without notice.
Specification subject to change without notice.
Draft 0.5
Preliminary 0.9
Preliminary 1.0
1.1
November 2003
ꢀ
Added IDD and IDDLP current numbersTechnical writ-
ing edits and typos.
ꢀ
December 2003
1.2
Added tCOR and tCOF for output from Clock
Generator.
ꢀ
Technical writing edits and typos.
Revision 1.2
3
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Table of Contents
1.0 Signal/Pin Connection and Description
1.1
1.2
1.3
CONNECTION DIAGRAM ...........................................................................................................8
BUFFER TYPES AND SIGNAL/PIN DIRECTORY ......................................................................9
DETAILED SIGNAL/PIN DESCRIPTIONS ................................................................................10
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.3.6
1.3.7
1.3.8
1.3.9
LPC Bus Interface .......................................................................................................10
Docking LPC Bus ........................................................................................................10
Clocks ..........................................................................................................................10
Infrared (IR) ................................................................................................................11
Serial Port (SP1) ..........................................................................................................11
General-Purpose Input/Output (GPIO) Ports ...............................................................11
Power and Ground .....................................................................................................12
Strap Configuration ......................................................................................................12
Test and Miscellaneous ...............................................................................................12
1.4
INTERNAL PULL-UP AND PULL-DOWN RESISTORS ............................................................13
2.0 Power, Reset and Clocks
2.1
POWER .....................................................................................................................................14
2.1.1
2.1.2
2.1.3
Power Planes ..............................................................................................................14
Power States ...............................................................................................................14
Power Connection and Layout Guidelines ..................................................................14
2.2
2.3
RESET SOURCES AND TYPES ...............................................................................................15
2.2.1
2.2.2
VDD Power-Up Reset ..................................................................................................15
Hardware Reset ...........................................................................................................15
CLOCK DOMAINS .....................................................................................................................15
2.3.1
2.3.2
2.3.3
2.3.4
LPC Domain ................................................................................................................15
48 MHz Domain ...........................................................................................................15
Chip Power-Up ............................................................................................................16
Specifications ..............................................................................................................16
2.4
TESTABILITY SUPPORT ..........................................................................................................16
2.4.1
2.4.2
2.4.3
ICT ...............................................................................................................................16
XOR Tree Testing ........................................................................................................16
Test Mode Entry Sequence .........................................................................................17
3.0 Device Architecture and Configuration
3.1
3.2
OVERVIEW ...............................................................................................................................18
CONFIGURATION STRUCTURE AND ACCESS .....................................................................18
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
The Index-Data Register Pair ......................................................................................18
Banked Logical Device Registers Structure ................................................................19
Standard Configuration Register Definitions ...............................................................20
Standard Configuration Registers ...............................................................................22
Default Configuration Setup ........................................................................................23
3.3
MODULE CONTROL .................................................................................................................24
3.3.1 Module Enable/Disable ................................................................................................24
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Table of Contents (Continued)
3.3.2
Floating Module Output ...............................................................................................24
3.4
3.5
INTERNAL ADDRESS DECODING ..........................................................................................25
PROTECTION ...........................................................................................................................25
3.5.1
3.5.2
3.5.3
3.5.4
3.5.5
Configuration Lock .......................................................................................................25
GPIO Ports Configuration Lock ...................................................................................25
Fast Disable Configuration Lock ..................................................................................25
Clock Control Lock ......................................................................................................25
GPIO Ports Lock ..........................................................................................................25
3.6
3.7
REGISTER TYPE ABBREVIATIONS ........................................................................................26
SUPERI/O CONFIGURATION REGISTERS .............................................................................26
3.7.1
3.7.2
3.7.3
3.7.4
3.7.5
3.7.6
SuperI/O ID Register (SID) ..........................................................................................26
SuperI/O Configuration 1 Register (SIOCF1) ..............................................................27
SuperI/O Configuration 2 Register (SIOCF2) ..............................................................27
SuperI/O Configuration 6 Register (SIOCF6) ..............................................................28
SuperI/O Revision ID Register (SRID) ........................................................................28
Clock Generator Control Register (CLOCKCF) ...........................................................29
3.8
3.9
INFRARED CONFIGURATION .................................................................................................30
3.8.1
3.8.2
Logical Device 2 (IR) Configuration .............................................................................30
Infrared Configuration Register ...................................................................................30
SERIAL PORT 1 CONFIGURATION .........................................................................................31
3.9.1
3.9.2
Logical Device 3 (SP1) Configuration ..........................................................................31
Serial Port 1 Configuration Register ............................................................................31
3.10 GENERAL-PURPOSE INPUT/OUTPUT (GPIO) PORTS CONFIGURATION ..........................32
3.10.1 General Description .....................................................................................................32
3.10.2 Implementation ............................................................................................................32
3.10.3 Logical Device 7 (GPIO) Configuration .......................................................................33
3.10.4 GPIO Pin Select Register (GPSEL) .............................................................................34
3.10.5 GPIO Pin Configuration Register (GPCFG) ................................................................34
3.10.6 GPIO Event Routing Register (GPEVR) ......................................................................35
3.11 DOCKING LPC SWITCH CONFIGURATION ............................................................................36
3.11.1 Logical Device 19 (DLPC) Configuration .....................................................................36
4.0 LPC Bus Interface
4.1
4.2
4.3
4.4
OVERVIEW ...............................................................................................................................37
LPC TRANSACTIONS ...............................................................................................................37
CLKRUN FUNCTIONALITY ......................................................................................................37
INTERRUPT SERIALIZER ........................................................................................................37
5.0 General-Purpose Input/Output (GPIO) Port
5.1
5.2
OVERVIEW ...............................................................................................................................38
BASIC FUNCTIONALITY ..........................................................................................................39
5.2.1
5.2.2
Configuration Options ..................................................................................................39
Operation .....................................................................................................................39
Revision 1.2
5
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Table of Contents (Continued)
5.3
EVENT HANDLING AND SYSTEM NOTIFICATION ................................................................40
5.3.1
5.3.2
Event Configuration .....................................................................................................40
System Notification ......................................................................................................40
5.4
GPIO PORT REGISTERS .........................................................................................................41
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
GPIO Pin Configuration Registers Structure ...............................................................42
GPIO Port Runtime Register Map ...............................................................................42
GPIO Data Out Register (GPDO) ................................................................................42
GPIO Data In Register (GPDI) ....................................................................................43
GPIO Event Enable Register (GPEVEN) ....................................................................43
GPIO Event Status Register (GPEVST) ......................................................................43
6.0 Docking LPC Switch
6.1
6.2
OVERVIEW ...............................................................................................................................44
FUNCTIONAL DESCRIPTION ..................................................................................................44
6.2.1
6.2.2
Basic Functionality .......................................................................................................44
LDRQ Sharing Mechanism ..........................................................................................44
6.3
DOCKING LPC SWITCH REGISTERS .....................................................................................45
6.3.1
6.3.2
Docking LPC Switch Register Map ..............................................................................45
Docking LPC Control (DLCTL) ....................................................................................45
7.0 Legacy Functional Blocks
7.1
SERIAL PORT 1 (SP1) ..............................................................................................................47
7.1.1
7.1.2
7.1.3
7.1.4
General Description .....................................................................................................47
Register Bank Overview ..............................................................................................47
SP1 Register Maps ......................................................................................................48
SP1 Bitmap Summary .................................................................................................49
7.2
IR FUNCTIONALITY (IR) ...........................................................................................................51
7.2.1
7.2.2
7.2.3
7.2.4
General Description .....................................................................................................51
Register Bank Overview ..............................................................................................51
IR Register Map for IR Functionality ............................................................................52
IR Bitmap Summary for IR Functionality
.................................................................55
8.0 Device Characteristics
8.1
GENERAL DC ELECTRICAL CHARACTERISTICS .................................................................58
8.1.1
8.1.2
8.1.3
8.1.4
8.1.5
Recommended Operating Conditions .........................................................................58
Absolute Maximum Ratings .........................................................................................58
Capacitance ................................................................................................................59
Power Consumption under Recommended Operating Conditions ..............................59
Voltage Thresholds ......................................................................................................59
8.2
DC CHARACTERISTICS OF PINS, BY I/O BUFFER TYPES ..................................................59
8.2.1
8.2.2
8.2.3
8.2.4
Input, PCI 3.3V ............................................................................................................59
Input, TTL Compatible .................................................................................................60
Input, TTL Compatible with Schmitt Trigger ................................................................60
Output, PCI 3.3V .........................................................................................................60
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Revision1.2
Table of Contents (Continued)
8.2.5
8.2.6
8.2.7
8.2.8
8.2.9
Output, Push-Pull Buffer ..............................................................................................60
Output, Open-Drain Buffer ...........................................................................................61
Quick Switch ................................................................................................................61
Exceptions ...................................................................................................................61
Terminology .................................................................................................................61
8.3
8.4
INTERNAL RESISTORS ...........................................................................................................62
8.3.1
8.3.2
Pull-Up Resistor ...........................................................................................................62
Pull-Down Resistor ......................................................................................................63
AC ELECTRICAL CHARACTERISTICS ....................................................................................63
8.4.1
8.4.2
8.4.3
8.4.4
8.4.5
8.4.6
8.4.7
8.4.8
8.4.9
AC Test Conditions ......................................................................................................63
Clock Input Timing .......................................................................................................64
Clock Output Timing ....................................................................................................64
LCLK and LRESET ......................................................................................................65
VDD Power-Up Reset ..................................................................................................66
LPC and SERIRQ Signals ...........................................................................................67
Serial Port, Sharp-IR, SIR and Consumer Remote Control Timing .............................68
MIR and FIR Timing ....................................................................................................69
Modem Control Timing ................................................................................................70
8.4.10 Docking LPC Switch Timing ........................................................................................71
Revision 1.2
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1.0 Signal/Pin Connection and Description
1.1 CONNECTION DIAGRAM
48 47 46 45 44 43 42 41 40 39 38 37
CTS1
1
2
36
35
34
33
32
31
30
29
28
27
26
25
LAD1
DTR1_BOUT1/BADDR
VDD
RI1
DLDRQ
IRRX1
3
VSS
4
DLAD0
LAD0
5
PC87382
48-Pin LQFP
(Top View)
6
IRTX
IRRX2_IRSL0
VDD
DLFRAME
LFRAME
DSERIRQ
SERIRQ
LRESET
DLCLK
LCLK
7
8
VSS
9
VCORF
10
11
12
GPIO00
GPIO01
13 14 15 16 17 18 19 20 21 22 23 24
48-Pin Low Profile Plastic Quad Flatpack (LQFP)
NS Package Number VBH48A
Order Number PC87382-VBH
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Revision1.2
1.0 Signal/Pin Connection and Description (Continued)
1.2 BUFFER TYPES AND SIGNAL/PIN DIRECTORY
This section describes all signals. Signals are organized in functional groups.
Buffer Types
The signal DC characteristics are denoted by a buffer type symbol, described briefly in Table 1 and in further detail in
Chapter 8 on page 58.
Table 1. Buffer Types
Symbol
INPCI
INT
Description
Input, PCI 3.3V
Input, TTL compatible
INTS
OPCI
Op/n
Input, TTL compatible, with Schmidt Trigger
Output, PCI 3.3V
Output, push-pull buffer that is capable of sourcing p mA and sinking n mA
Output, open-drain output buffer that is capable of sinking n mA
ODn
QS
Quick Switch pin
Power pin
PWR
GND
Ground pin
Revision 1.2
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1.0 Signal/Pin Connection and Description (Continued)
1.3 DETAILED SIGNAL/PIN DESCRIPTIONS
This section describes all signals of the PC87382.
1.3.1 LPC Bus Interface
Signal
LAD3-0
Pin(s)
I/O Buffer Type
Description
40, 38,
36, 32
I/O
INPCI/OPCI LPC Address-Data. Multiplexed command, address bidirectional data
and cycle status.
LCLK
25
16
30
I
O
I
INPCI
OPCI
INPCI
LPC Clock. Same as PCI clock (up to 33 MHz).
LDRQ
LPC DMA Request. Encoded DMA request for LPC interface.
LFRAME
LPC Frame. Low pulse indicates the beginning of a new LPC cycle or
termination of a broken cycle.
LRESET
SERIRQ
27
28
I
INPCI
LPC Reset. Same as PCI system reset.
I/O
INPCI/OPCI Serial IRQ. The interrupt requests are serialized over a single pin, where
each IRQ level is delivered during a designated time slot.
CLKRUN
19
I/OD
INPCI/OD6 Clock Run. Same as PCI CLKRUN.
1.3.2 Docking LPC Bus
Signal
Pin(s)
I/O Buffer Type
Description
DLAD3-0
41, 39,
37, 33
I/O
QS
Dock LPC Address-Data. Multiplexed command, address bidirectional
data and cycle status.
DLCLK
26
31
I/O
I/O
QS
QS
Dock LPC Clock. Same as PCI clock (up to 33 MHz).
DLFRAME
Dock LPC Frame. Low pulse indicates the beginning of a new LPC cycle
or termination of a broken cycle.
DSERIRQ
29
I/O
QS
Dock Serial IRQ. The interrupt requests are serialized over a single pin,
where each IRQ level is delivered during a designated time slot.
DCLKRUN
DLRESET
20
18
I/O
O
QS
Dock Clock Run. Same as PCI CLKRUN.
O4/4
Dock LPC Reset. Main LPC Reset combined with Dock LPC enable.
DLDRQ
4
I
INT
Dock LPC DMA Request. Encoded DMA request for LPC interface.
1.3.3 Clocks
Signal
Pin(s)
43
42
I/O Buffer Type
Description
CLKIN
I
INT
Clock In. 14.318 MHz or 48 MHz clock input.
DCLKOUT
O
O14/14
Dock Clock Output. Buffered clock for the Docking device. Enabled
together with DLCLK; otherwise in TRI-STATE.
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Revision1.2
1.0 Signal/Pin Connection and Description (Continued)
1.3.4 Infrared (IR)
Signal
IRRX1
Pin(s)
I/O Buffer Type
Description
5
7
I
INTS
IR Receive 1. Primary input to receive serial data from the IR transceiver.
IRRX2_IRSL0
I/O
INTS/O3/6 IRRX2 - IR Receive 2. Auxiliary IR receiver input to support a second
transceiver.
IRSL0 - IR Select. Output used to control the IR transceiver.
IRTX
6
O
O6/12
IR Transmit. IR serial output data.
1.3.5 Serial Port (SP1)
Signal
CTS1
Pin(s) I/O Buffer Type
Description
1
I
I
INTS
INTS
INTS
O3/6
Clear to Send. When low, indicates that the modem or other data transfer
device is ready to exchange data.
DCD1
DSR1
44
45
Data Carrier Detected. When low, indicates that the modem or other data
transfer device has detected the data carrier.
I
Data Set Ready. When low, indicates that the data transfer device, e.g.,
modem, is ready to establish a communications link.
DTR1_BOUT1 2
O
Data Terminal Ready. When low, indicates to the modem or other data
transfer device that the UART is ready to establish a communications link.
Baud Output. Provides the associated serial channel baud rate generator
output signal if Test Mode is selected, i.e., if bit 7 of the EXCR1 register is
set.
RI1
3
I
INTS
Ring Indicator. When low, indicates that a telephone ring signal was
received by the modem. It is monitored during power-off for wake-up event
detection.
RTS1
47
O
O3/6
Request to Send. When low, indicates to the modem or other data
transfer device that the corresponding UART is ready to exchange data. A
system reset sets this signal to inactive high; a loopback operation holds it
inactive.
SIN1
46
48
I
INTS
O3/6
Serial Input. Receives composite serial data from the communications link
(peripheral device, modem or other data transfer device).
SOUT1
O
Serial Output. Sends composite serial data to the communications link
(peripheral device, modem or other data transfer device). These signals
are set active high after a system reset.
1.3.6 General-Purpose Input/Output (GPIO) Ports
Signal
Pin(s)
I/O Buffer Type
Description
GPIO00-04
11, 12,
13, 14,
15
I/O
I/O
INTS
OD6, O3/6
/
General-Purpose I/O Port 0, bits 0-4. Each pin is configured independent-
ly as input or I/O, with or without static pull-up, and with either open-drain or
push-pull output type. The port supports interrupt assertion, and each pin
can be enabled or masked as an interrupt source.
GPIO20-21, 17, 21
INTS
/
General-Purpose I/O Port 2, bits 0,1,3. Same as Port 0, without
22
interrupt support.
OD6, O3/6
GPIO23
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1.0 Signal/Pin Connection and Description (Continued)
1.3.7 Power and Ground
Signal
Pin(s)
I/O
Buffer Type
PWR
Description
VDD
VSS
35, 24, 8
34, 23, 9
I
I
Main 3.3V Power Supply.
Ground.
GND
1.3.8 Strap Configuration
Signal
BADDR
Pin(s) I/O Buffer Type
Description
2
I
INTS
Base Address. Sampled at VDD Power-Up reset to determine the base
address of the configuration Index-Data register pair.
– No pull-down resistor (default)
- the Index-Data pair at
164Eh-164Fh.
– 10 KΩ1 external pull-down resistor - the Index-Data pair at 2Eh-2Fh1.
The external pull-down resistor must be connected to VSS
.
TRIS
47
I
INTS
TRI-STATE Device. Sampled at VDD Power-Up to force the device to
float all its output and I/O pins.
– No pull-down resistor (default)
- normal pin operation
– 10 KΩ1 external pull-down resistor - floating device pins
The external pull-down resistor must be connected to VSS
.
When TRIS is set to 0 (by an external pull-down resistor), TEST must be
1 (i.e., left unconnected).
TEST
48
I
INTS
XOR Tree Test Mode. Sampled at VDD Power-Up to force the device
pins into a XOR tree configuration.
– No pull-down resistor (default)
– 10 KΩ1 external pull-down resistor - pins configured as XOR tree.
The external pull-down resistor must be connected to VSS
- normal device operation
.
When TEST is set to 0 (by an external pull-down resistor), TRIS must be
1 (i.e., left unconnected).
1. Because the strap function is multiplexed with the Serial Port pins, a CMOS transceiver device is recommended
for Serial Port functionality; in this case, the value of the external pull-down resistor is 10 KΩ. If, however, a TTL
transceiver device is used, the value of the external pull-down resistor must be 470Ω, and since the Serial Port
pins are not able to drive this load, the external pull-down resistor must disconnect tEPLV after VDD power-up
(see Section 8.4.5 on page 66).
1.3.9 Test and Miscellaneous
Signal
Pin(s) I/O Buffer Type
Description
XOR_OUT
16
10
O
O3/6
-
XOR Tree Output. All the device pins (except ground and power pins)
are internally connected in a XOR tree structure.
VCORF
I/O
On-Chip Core Power Converter Filter. Powers the core logic of all the
device modules. An external 0.1 µF ceramic filter capacitor must be
connected between this pin and VSS
.
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1.0 Signal/Pin Connection and Description (Continued)
1.4 INTERNAL PULL-UP AND PULL-DOWN RESISTORS
The signals listed in Table 2 can optionally support internal pull-up (PU) and/or pull-down (PD) resistors. See Section 8.3 on
page 62 for the values of each resistor type.
Table 2. Internal Pull-Up and Pull-Down Resistors
Signal
Pin(s)
Type
Comments
General-Purpose Input/Output (GPIO) Ports
GPIO00-04
GPIO21
11, 12,13,
14, 15
PU30
Programmable
21
PU80
PU30
Programmable
Programmable
GPIO20,
GPIO23
17, 22
Strap Configuration and Testability
Strap1
Strap1
Strap1
BADDR
TEST
TRIS
2
PU30
PU30
PU30
48
47
Docking LPC
Active when the switch is off2
DLAD3-0
33, 37, 39,
41
PU30
Active when the switch is off2
Active when the switch is off2
Active when the switch is off2
Active when the switch is off2
Active when the switch is off2
Active when the switch is off2
DLCLK
26
42
31
18
29
20
4
PU30
PU80
PU30
PD120
PU30
PU30
PU30
DCLKOUT
DLFRAME
DLRESET
DSERIRQ
DCLKRUN
DLDRQ
1. Active only during VDD Power-Up reset.
2. The Docking LPC signal resistors are active when the corresponding
switch is off.
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2.0 Power, Reset and Clocks
2.1 POWER
2.1.1 Power Planes
The PC87382 has a single 3.3V power source, VDD. Internally, an additional power plane (VCORF) is generated using an on-
chip voltage converter. This power plane feeds all the core logic.
2.1.2 Power States
The following terminology is used in this document to describe the power states:
• Power On - VDD is active.
• Power Off - VDD is inactive.
2.1.3 Power Connection and Layout Guidelines
The PC87382 requires a power supply voltage of 3.3V ± 10% for the VDD supply. The on-chip Core voltage converter gen-
erates a voltage below 3V for the internal logic.
VDD and VCORF use a common ground return marked VSS.
To obtain the best performance, bear in mind the following recommendations.
Ground Connection. The following items must be connected to the ground layer (VSS) as close to the device as possible:
• The ground return (VSS) pins
• The decoupling capacitors of the Main power supply (VDD) pins
• The decoupling capacitor of the on-chip Core power converter (VCORF) pin
Note that a low-impedance ground layer also improves noise isolation.
Decoupling Capacitors. The following decoupling capacitors must be used in order to reduce EMI and ground bounce:
• Main power supply (VDD): Place one 0.1 µF capacitor on each VDD-VSS pin pair, as close to the pin as possible. In ad-
dition, place one 10−47 µF tantalum capacitor on the common net as close to the device as possible.
• On-Chip Core power converter (VCORF): Place one 0.1 µF ceramic capacitor on the VCORF-VSS pin pair as close to the
pin as possible.
Main 3.3V
8
9
24
23
VDD
VSS
VDD
VSS
+
PC87382
10-47
µF
0.1 µF
0.1 µF
0.1 µF
10
VCORF
35
34
VDD
VSS
0.1 µF
Figure 1. Decoupling Capacitors Connection
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2.0 Power, Reset and Clocks (Continued)
2.2 RESET SOURCES AND TYPES
The PC87382 has the following reset sources:
• VDD Power-Up Reset - activated when VDD is powered up
• Hardware Reset - activated when the LRESET input is asserted (low)
2.2.1
V
Power-Up Reset
DD
VDD Power-Up reset is generated by an internal circuit when VDD power is turned on. VDD Power-Up reset time (tIRST) lasts
until the LRESET signal is de-asserted. The Hardware reset (LRESET) must be asserted for a minimum of 10 ms to ensure
that the PC87382 operates correctly.
External devices must wait at least tIRST before accessing the PC87382. If the host processor accesses the PC87382 during
this time, the PC87382 LPC interface ignores the transaction (that is, it does not return a SYNC handshake).
VDD Power-Up reset performs the following actions:
• Puts pins with strap options into TRI-STATE and enables their internal pull-up resistors
• Samples the logic levels of the strap pins
• Executes all the actions performed by the Hardware reset; see Section 2.2.2
2.2.2 Hardware Reset
Hardware reset is activated by assertion of LRESET input while VDD is “good”. When VDD power is off, the PC87382 ignores
the level of the LRESET input. Hardware reset performs the following actions:
• Resets all lock bits in configuration registers
• Loads default values to all the bits in the Configuration Control
• Resets all the logical devices
• Loads default values to all the module registers
2.3 CLOCK DOMAINS
The PC87382 has two clock domains, as shown in Table 3.
Table 3. Clock Domains of the PC87382
Clock
Domain
Frequency
Source
Usage
LPC bus interface and Configuration registers,
Docking LPC Switch logic
LPC
Up to 33 MHz
LPC clock input (LCLK)
Legacy functions (Serial Port, Infrared)
and DCLKOUT output pin
On-chip Clock Generator or
directly from Clock Input (CLKIN)
48 MHz
48 MHz
2.3.1 LPC Domain
The LPC clock signal at the LCLK pin must become valid before the end of the Hardware reset (LRESET); see Section 2.2.2.
This clock can be slowed down or stopped using the CLKRUN protocol.
2.3.2 48 MHz Domain
The 48 MHz clock domain is sourced either by the on-chip Clock Generator or directly by the CLKIN input pin. The Clock
Generator is fed by applying a clock source at a frequency of 14.31818 MHz. The Clock Generator generates two internal
clocks, 24 MHz and 48 MHz. After power-up or Hardware reset, the clock (Clock Generator or external clock) is disabled.
Clock Generator Functional Description
The on-chip Clock Generator starts working when it is enabled by bit 7 of the CLOCKCF register, Index 29h, i.e., when the
bit value changes from 0 to 1 (only for 14.31818 MHz clock source). Once enabled, the output clock is frozen to a steady
logic level until the clock generator provides a stable output clock that meets all requirements. Then the clock starts toggling.
On Hardware reset, the chip wakes up with the on-chip Clock Generator disabled. The input clock of the Clock Generator
may toggle regardless of the state of the LRESET pin. The Clock Generator waits for a toggling input clock.
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2.0 Power, Reset and Clocks (Continued)
Bit 4 (read only) of the CLOCKCF register is the Valid Clock Generator status bit. While stabilizing, the output clock is frozen
to a steady logic level, and the status bit is cleared to 0 to indicate a frozen clock. When the clock generator is stable, the output
clock starts toggling and the status bit is set to 1. The status bit tells the software when the Clock Generator is ready. The soft-
ware should poll this status bit until it is set (1), and only then activate the UART, the Infrared interface and the DCLKOUT pin.
The clock generator and its output clock do not consume power when they are disabled.
2.3.3 Chip Power-Up
To ensure proper operation, proceed as follows after power-up:
1. Set bits 5 and 6 of the Clock Generator Control register (CLOCKCF) at Index 29h according to the clock source used
and the desired output frequency on DCLKOUT; see Table 4.
2. Enable the clock. If the clock source is 14.31818 MHz:
— Poll bit 4 of the CLOCKCF register while the clock generator is stabilizing.
— When bit 4 of CLOCKCF is set to 1, go to step 3.
3. Enable any module in the chip, as needed.
Table 4. Clock Generator Encoding Options
CLKIN Pin Frequency
Desired DCLKOUT Frequency
CLOCKCF Bits 6, 5
48 MHz
48 MHz
14.31818 MHz
48 MHz
00
01
11
14.31818 MHz
2.3.4 Specifications
Wake-up time is 33 msec (maximum). This is measured from the time the Clock Generator is enabled until the clock is stable.
Note: The reference clock must be stable at the time the Clock Generator is enabled. Tolerance (long term deviation) of
the generator output clock, relative to the input clock, is ±110 ppm. Total tolerance is therefore
± (input clock tolerance + 110 ppm).
2.4 TESTABILITY SUPPORT
The PC87382 supports two testability modes:
• In-Circuit Testing (ICT)
• XOR Tree Testing
2.4.1 ICT
The In-Circuit Testing (ICT) technique, also known as “bed-of-nails”, injects logic patterns to the input pins of the devices
mounted on the tested board. It then checks their outputs for the correct logic levels.
The PC87382 supports this testing technique by floating (putting in TRI-STATE) all the device pins. This prevents “back-
driving” the PC87382 pins by the ICT tester when a device normally controlled by PC87382 is tested (device inputs are driv-
en by the ICT tester).
2.4.2 XOR Tree Testing
When the PC87382 is mounted on a board, it can be tested using the XOR Tree technique. This test also checks the correct
connection of the device pins to the board.
In XOR Tree mode, all PC87382 pins are configured as inputs, except the last pin in the tree, which is the XOR_OUT output. The
buffer type of the input pins participating in the XOR tree is INT (Input, TTL compatible), regardless of the buffer type of these pins
in normal device operation mode (see Section 1.3 on page 10). The input pins are chained through XOR gates, as shown in
Figure 2. The power and ground pins (VDD, VSS, VCORF) are excluded from the XOR tree.
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2.0 Power, Reset and Clocks (Continued)
VDD
XOR_OUT
Pin 17
Pin 18
Pin 48
Pin 1
Pin 15
Pin 16
Figure 2. XOR Tree (Simplified Diagram)
The maximum propagation delay through the XOR tree, from the first pin in the chain to XOR_OUT is 200 ns.
2.4.3 Test Mode Entry Sequence
Table 5 shows the decoding values required to enter each test mode. The test modes are decoded from the TEST and TRIS
strap pins and are latched into PC87382 on power up.
Table 5. Test Mode Selection
Test Mode
TEST
TRIS
No Test Mode Selected
1
1
0
0
1
0
1
0
ICT
XOR Tree
Reserved exclusively for NSC use
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3.0 Device Architecture and Configuration
The PC87382 comprises a collection of legacy and proprietary functional blocks. Each functional block is described in a sep-
arate chapter. This chapter describes the PC87382 structure and provides all logical device specific information, including
special implementation of generic blocks, system interface and device configuration.
3.1 OVERVIEW
The PC87382 consists of four logical devices, the host interface, and a central set of configuration registers, all built around
a central internal bus. Figure 3 illustrates the blocks and related logic.
The system interface serves as a bridge between the external LPC interface and the internal bus. It supports 8-bit read and
write transactions for I/O and DMA, as defined in Intel’s LPC Interface Specification, Revision 1.1.
The central configuration register set is ACPI compliant and supports a PnP configuration. The configuration registers are
structured as a subset of the Plug and Play Standard registers, defined in Appendix A of the Plug and Play ISA Specification,
Revision 1.0a by Intel and Microsoft. All system resources assigned to the functional blocks (I/O address space, DMA chan-
nels and IRQ lines) are configured in, and managed by, the central configuration register set. In addition, some function-
specific parameters are configurable through the configuration registers and distributed to the functional blocks through spe-
cial control signals.
SIN1
SOUT1
RTS1
DTR1_BOUT1
GPIO20,21,23
GPIO00-04
Serial
Port 1
CTS1
GPIO
Ports
DSR1
DCD1
RI1
CLKIN
LRESET
LCLK
IRRX1,IRRX2
SERIRQ
LDRQ
Bus
Interface
IRTX
IR
LFRAME
LAD3-0
CLKRUN
IRSL0
DLRESET
DLCLK
LPC
Bus
Switch
DSERIRQ
DLDRQ
DLFRAME
DLAD3-0
DCLKRUN
BADDR
TEST
TRIS
Strap
Config
Config &
Control Registers
Figure 3. PC87382 Detailed Block Diagram
3.2 CONFIGURATION STRUCTURE AND ACCESS
The configuration structure is comprised of a set of banked registers which are accessed via a pair of specialized registers.
3.2.1 The Index-Data Register Pair
Access to the PC87382 configuration registers is via an Index-Data register pair, using only two system I/O byte locations.
The base address of this register pair is determined during VDD Power-Up reset, according to the state of the hardware strap-
ping option on the BADDR pin. Table 6 shows the selected base addresses as a function of BADDR.
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3.0 Device Architecture and Configuration (Continued)
Table 6. BADDR Strapping Options
I/O Address
BADDR
Index Register Data Register
0
2Eh
2Fh
1 (default)
164Eh
164Fh
The Index register is an 8-bit read/write register located at the selected base address (Base+0). It is used as a pointer to the
configuration register file, and holds the index of the configuration register that is currently accessible via the Data register.
Reading the Index register returns the last value written to it (or the default of 00h after reset).
The Data register is an 8-bit register (Base+1) used as a data path to any configuration register. Accessing the Data register
actually accesses the configuration register that is currently pointed to by the Index register.
3.2.2 Banked Logical Device Registers Structure
Each functional block is associated with a Logical Device Number (LDN). The configuration registers are grouped into banks,
where each bank holds the standard configuration registers of the corresponding logical device. Table 7 shows the LDN val-
ues of the PC87382 functional blocks. Any value not listed is reserved.
Figure 4 shows the structure of the standard configuration register file. The LDN and PC87382 configuration registers are
not banked and are accessed by the Index-Data register pair only, as described in Section 3.2.1. However, the device control
and device configuration registers are duplicated over four banks for four logical devices. Therefore, accessing a specific
register in a specific bank is performed by two-dimensional indexing, where the LDN register selects the bank (or logical
device) and the Index register selects the register within the bank. Accessing the Data register while the Index register holds
a value of 30h or higher physically accesses the logical device configuration registers currently pointed to by the Index reg-
ister, within the logical device currently selected by the LDN register.
07h
Logical Device Number Register
SuperI/O Configuration Registers
20h
2Fh
Logical Device Control Register
30h
60h
63h
70h
71h
74h
75h
Standard Logical Device
Configuration Registers
Bank Select
Special (Vendor-defined)
Logical Device
F0h
FFh
Configuration Registers
Banks
(One per Logical Device)
Figure 4. Structure of Standard Configuration Register File
Table 7. Logical Device Number (LDN) Assignments
LDN
Functional Block
02h
03h
07h
19h
Infrared (IR)
Serial Port 1 (SP1)
General-Purpose I/O (GPIO) Ports
Docking LPC Switch
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3.0 Device Architecture and Configuration (Continued)
Write accesses to unimplemented registers (i.e., accessing the Data register while the Index register points to a non-existing
register) are ignored; reads return 00h on all addresses, except 74h and 75h (DMA configuration registers), which return
04h (indicating no DMA channel is active). The configuration registers are accessible immediately after reset.
3.2.3 Standard Configuration Register Definitions
In the registers below, any undefined bit is reserved. Unless otherwise noted, the following definitions also hold true:
ꢀ
All registers are read/write.
ꢀ
All reserved bits return 0 on reads, except where noted otherwise. To prevent unpredictable results, do not modify
these bits. Use read-modify-write to prevent the values of reserved bits from being changed during write.
ꢀ
Write-only registers must not use read-modify-write during updates.
Table 8. Standard General Configuration Registers
Index
Register Name
Description
07h
Logical Device
Number
This register selects the current logical device. See Table 7 for valid numbers. All
other values are reserved.
20h-2Fh
PC87382
Configuration
PC87382 configuration registers and ID registers.
Table 9. Logical Device Activate Register
Index
Register Name
Description
30h
Activate
Bits 7-1: Reserved.
Bit 0:
Logical device activation control; see Section 3.3 on page 24.
0: Disabled
1: Enabled
Table 10. I/O Space Configuration Registers
Index
Register Name
Description
60h
I/O Port Base
Address Bits 15−8
Descriptor 0
Indicates selected I/O lower limit address bits 15−8 for I/O Descriptor 0.
61h
I/O Port Base
Address Bits 7−0
Descriptor 0
Indicates selected I/O lower limit address bits 7−0 for I/O Descriptor 0.
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3.0 Device Architecture and Configuration (Continued)
Table 11. Interrupt Configuration Registers
Index
Register Name
Description
70h
Interrupt Number Indicates selected interrupt number.
Bits 7-4: Reserved.
Bits 3-0: These bits select the interrupt number. A value of 1 selects IRQ1. A value
of 15 selects IRQ15. IRQ0 is not a valid interrupt selection and
represents no interrupt selection.
Note: Avoid selecting the same interrupt number (except 0) for different logical
devices, as it causes the PC87382 to behave unpredictably.
71h
Interrupt Request Indicates the type and polarity of the interrupt request number selected in the
Type Select
previous register. If a logical device supports only one type of interrupt, the
corresponding bit is read only.
Bits 7-2: Reserved.
Bit 1:
Polarity of interrupt request selected in previous register.
0: Low polarity.
1: High polarity.
Bit 0:
Type of interrupt request selected in previous register.
0: Edge.
1: Level.
Table 12. DMA Configuration Registers
Description
Index
Register Name
74h
DMA Channel
Select 0
Indicates selected DMA channel for DMA 0 of the logical device (0 is the first DMA
channel if more than one DMA channel is used).
Bits 7-3: Reserved.
Bits 2-0: These select the DMA channel for DMA 0, where:
- A value of 0, 1, 2, or 3 selects DMA channel 0, 1, 2, or 3, respectively.
- A value of 4 indicates that no DMA channel is active.
- The values 5-7 are reserved.
Note: Avoid selecting the same DMA channel (except 4) for different logical
devices, as it causes the PC87382 to behave unpredictably.
75h
DMA Channel
Select 1
Indicates selected DMA channel for DMA 1 of the logical device (1 is the second
DMA channel if more than one DMA channel is used).
Bits 7-3: Reserved.
Bits 2-0: These select the DMA channel for DMA 1, where:
- A value of 0, 1, 2, or 3 selects DMA channel 0, 1, 2, or 3, respectively.
- A value of 4 indicates that no DMA channel is active.
- The values 5−7 are reserved.
Note: Avoid selecting the same DMA channel (except 4) for different logical
devices, as it causes the PC87382 to behave unpredictably.
Table 13. Special Logical Device Configuration Registers
Index
Register Name
Description
F0h-FFh
Logical Device Special (vendor-defined) configuration options.
Configuration
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3.0 Device Architecture and Configuration (Continued)
3.2.4 Standard Configuration Registers
Index
Register Name
Logical Device Number
07h
20h
SuperI/O ID
21h
SuperI/O Configuration 1
SuperI/O Configuration 2
Reserved
22h
23h-25h
26h
SuperI/O Control and
Configuration Registers
SuperI/O Configuration 6
SuperI/O Revision ID
27h
28h
Reserved
29h
Clock Generator Control
2Ah - 2Fh
30h
Reserved exclusively for National use
Logical Device Control (Activate)
I/O Base Address Descriptor 0 Bits 15-8
I/O Base Address Descriptor 0 Bits 7-0
Interrupt Number and Wake-Up on IRQ Enable
IRQ Type Select
60h
Logical Device Control and
61h
Configuration Registers -
one per Logical Device
(some are optional)
70h
71h
74h
DMA Channel Select 0
75h
DMA Channel Select 1
F0h - FFh
Device Specific Logical Device Configuration 1 to 15
Figure 5. Configuration Register Map
SuperI/O Configuration Registers
The PC87382 configuration registers at Indexes 20h and 27h are used for part identification. The other configuration
registers are used for global power management and the selection of pin multiplexing options. For details, see Section 3.7
on page 26.
Logical Device Control and Configuration Registers
A subset of these registers is implemented for each logical device. See the functional block descriptions in the following sec-
tions.
Control
The only implemented control register for each logical device is the Activate register at Index 30h. Bit 0 of the Activate reg-
ister controls the activation of the associated functional block. Activation enables access to the functional block’s registers,
and attaches its system resources, which are unassigned as long as it is not activated. Other effects may apply on a function-
specific basis (such as clock enable and active pinout signaling). Access to the configuration register of the logical device is
enabled even when the logical device is not activated.
Standard Configuration
The standard configuration registers manage the PnP resource allocation to the functional blocks. The I/O port base address
descriptor 0 is a pair of registers at Index 60-61h, holding the first 16-bit base address for the register set of the functional
block. An optional 16-bit second base-address (descriptor 1) at Index 62-63h is used for logical devices with more than one
continuous register set. Interrupt Number (Index 70h) and IRQ Type Select (Index 71h) allocate an IRQ line to the block and
control its type. DMA Channel Select 0 (Index 74h) allocates a DMA channel to the block, where applicable. DMA Channel
Select 1 (Index 75h) allocates a second DMA channel, where applicable.
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3.0 Device Architecture and Configuration (Continued)
Special Configuration
The vendor-defined registers, starting at Index F0h, control function-specific parameters such as operation modes, power
saving modes, pin TRI-STATE, and non-standard extensions to generic functions.
3.2.5 Default Configuration Setup
In the event of a VDD Power-Up or Hardware reset, the PC87382 wakes up with the following default configuration setup:
— The configuration base address is 2Eh or 164Eh, according to the BADDR strap pin value, as shown in Table 6 on
page 19.
— All logical devices are disabled.
— All multiplexed GPIO pins are configured to their respective default function. When configured as GPIO, they have
an internal static pull-up (default direction is input).
— The legacy devices (Serial Port and IR) are assigned with their legacy system resource allocation.
— National Semiconductor proprietary functions are not assigned with any default resources, and the default values of
their base addresses are all 00h.
See Section 2.2 on page 15 for more details on PC87382 reset sources and types.
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3.0 Device Architecture and Configuration (Continued)
3.3 MODULE CONTROL
3.3.1 Module Enable/Disable
Module control is performed primarily through the Activation bit (bit 0 of Index 30h) of each logical device. The operation of
each module can be controlled by the host through the LPC bus.
Module enable/disable by the host through the LPC bus is controlled by the following bits:
ꢀ
Activation bit (bit 0) in Index 30h of the Standard configuration registers; see Section 3.2.3 on page 20.
ꢀ
Fast Disable bit in SIOCF6 register; for the Serial Port 1 and IR modules only; see Section 3.7.4 on page 28.
ꢀ
Global Enable bit (GLOBEN) in SIOCF1 register; see Section 3.7.2 on page 27.
A module is enabled only if all of these bits are set to their “enable” value.
When a legacy (SP1 or IR) module is disabled, the following takes place:
ꢀ
The host system resources of the logical device (IRQ, DMA and runtime address range) are unassigned.
ꢀ
Access to the standard- and device-specific Logical Device configuration registers through the LPC bus remains enabled.
ꢀ
Access to the module’s runtime registers through the LPC bus is disabled (transactions are ignored; SYNC cycle is
not generated).
ꢀ
The module’s internal clock is disabled (the module is not functional) to lower the power consumption.
When the GPIO or DLPC module is disabled, the following takes place:
ꢀ
The host system resources of the logical device (IRQ and runtime address range) are unassigned.
ꢀ
Access to the standard- and device-specific Logical Device configuration registers through the LPC bus remains enabled.
ꢀ
Access to the module’s runtime registers through the LPC bus is disabled (transactions are ignored; SYNC cycle is
not generated).
ꢀ
The module is functional.
3.3.2 Floating Module Output
The pins of the Legacy modules (Serial Port, Infrared) can be floated. When the TRI-STATE Control bit (bit 0) is set in the
specific module configuration register (at Index F0h of the specific logical device in the configuration space) and the module
is disabled (see Section 3.3.1), the module output signals are floated and the I/O signals are configured as inputs (note that
the logic level at the inputs is ignored by the module, which is disabled).
Figure 6 shows the control mechanism for floating the pins of a Legacy module.
Device Configuration
Activation
Bit (bit 0)
Index 30h
Register
Global
Enable
GLOBEN
Legacy
Module
Module Enable
SIOCF1
Register
Fast
SIOCF6
Register
Disable
xxxDIS1
Legacy Module
Output
Buffer
Enable
TRI-
STATE
Control
Configuration
Register
(Index F0h)
1. Wherever the bit is implemented
Figure 6. Control of Floating Legacy Module Pins
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3.4 INTERNAL ADDRESS DECODING
A full 16-bit address decoding is applied when accessing the configuration I/O space as well as the registers of the functional
blocks. However, the number of configurable bits in the base address registers varies for each logical device.
The lower 1, 2, 3, 4 or 5 address bits are decoded within the functional block to determine the offset of the accessed register
within the logical device’s I/O range of 2, 4, 8, 16 or 32 bytes, respectively. The remaining bits are matched with the base
address register to decode the entire I/O range allocated to the logical device. Therefore the lower bits of the base address
register are forced to 0 (read only), and the base address is forced to be 2, 4, 8, 16 or 32 byte-aligned, according to the size
of the I/O range.
The base addresses of the Serial Port 1 and FIR modules are limited to the I/O address range of 00h to 7FXh only (bits 11-
15 are forced to 0). The addresses of the non-legacy logical devices are configurable within the full 16-bit address range (up
to FFFXh).
3.5 PROTECTION
The PC87382 provides features to protect the hardware configuration from changes made by application software running
on the host.
The protection is activated by the software setting a “sticky” lock bit. Each lock bit protects a group of configuration bits lo-
cated either in the same register or in different registers. When the lock bit is set, the lock bit and all the protected bits be-
come read only and cannot be further modified by the host through the LPC bus. All the lock bits are reset by Hardware
reset, thus unlocking the protected configuration bits.
The bit locking protection mechanism is optional.
The protected groups of configuration bits are described below.
3.5.1 Configuration Lock
Lock bit:
LOCKMCF in SIOCF1 register (Device Configuration).
Protected bits: LOCKMCF and IOWAIT (in SIOCF1 register) and all bits in SIOCF2 register (Device Configuration).
3.5.2 GPIO Ports Configuration Lock
Protects the configuration (but not the data) of all the GPIO Ports.
Lock bit:
LOCKGCF in SIOCF1 register (Device Configuration).
Protected bits for each GPIO Port: LOCKGCF in SIOCF1 register, and all bits in GPCFG register (except LOCKCFP bit) and
GPEVR register (Device Configuration).
3.5.3 Fast Disable Configuration Lock
Protects the Fast Disable bits for all the Legacy modules.
Lock bit:
LOCKFDS in SIOCF6 register (Device Configuration).
Protected bits: All bits in SIOCF6 register (except General-Purpose Scratch bits) and GLOBEN bit in SIOCF1 register
(Device Configuration).
3.5.4 Clock Control Lock
Protects the Clock Generator control bits.
Lock bit:
LOCKCCF in CLOCKCF register (Device Configuration).
Protected bits: All bits in CLOCKCF register (Device Configuration).
3.5.5 GPIO Ports Lock
Protects the configuration and data of all the GPIO Ports.
Lock bit:
LOCKCFP in GPCFG register, for each GPIO Port (Device Configuration).
Protected bits for each GPIO Port: PUPCTL, OUTTYPE and OUTENA in GPCFG register; the corresponding bit (to the
port pin) in GPDO register (GPIO Ports).
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3.0 Device Architecture and Configuration (Continued)
3.6 REGISTER TYPE ABBREVIATIONS
The following abbreviations are used to indicate the Register Type:
ꢀ
R/W
R
= Read/Write.
ꢀ
= Read from a specific address returns the value of a specific register. Write to the same address is to a dif-
ferent register.
ꢀ
ꢀ
ꢀ
ꢀ
W
= Write.
RO
= Read Only.
R/W1C = Read/Write 1 to Clear. Writing 1 to a bit clears it to 0. Writing 0 has no effect.
R/W1S = Read/Write 1 to Set. Writing 1 to a bit sets its value to 1. Writing 0 has no effect.
3.7 SUPERI/O CONFIGURATION REGISTERS
This section describes the SuperI/O configuration and ID registers (those registers with first level indexes in the range of
20h-2Eh). See Table 14 for a summary and directory of these registers.
Note: Set the configuration registers to enable functions or signals that are relevant to the specific device. The values of
fields that select functions, or signals, that are excluded from a specific device are treated as reserved and should
not be selected.
Table 14. SuperI/O Configuration Registers
Index
Mnemonic
SID
Register Name
Type
Section
20h
21h
SuperI/O ID
RO
R/W
R/W
3.7.1
3.7.2
3.7.3
SIOCF1
SIOCF2
SuperI/O Configuration 1
SuperI/O Configuration 2
22h
23h-25h
26h
Reserved for National use
SIOCF6
SRID
SuperI/O Configuration 6
R/W
RO
3.7.4
3.7.5
3.7.6
27h
SuperI/O Revision ID
29h
CLOCKCF
Clock Generator Control Register
R/W
2Ah - 2Fh
Reserved exclusively for National use
3.7.1 SuperI/O ID Register (SID)
This register contains the identity number of the chip. The PC87382 family is identified by the value F4h.
Location: Index 20h
Type:
RO
Bit
7
6
5
4
3
2
1
0
Name
Chip ID
Reset
F4h
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3.0 Device Architecture and Configuration (Continued)
3.7.2 SuperI/O Configuration 1 Register (SIOCF1)
Location: Index 21h
Type:
Varies per bit
Bit
7
6
5
0
4
1
3
0
2
0
1
Reserved
0
0
GLOBEN
1
Name
Reset
LOCKMCF LOCKGCF
Reserved
IOWAIT
0
0
Bit
Type
Description
7
R/W1S LOCKMCF (Lock Multiplexing Configuration). When set to 1, this bit locks the configuration of
registers SIOCF1 and SIOCF2 by disabling writing to all bits in these registers (including the LOCKMCF
bit itself), except for the LOCKGCF and GLOBEN bits in SIOCF1. Once set, this bit can only be cleared
by Hardware reset.
0: R/W bits are enabled for write (default).
1: All bits are RO.
6
R/W1S LOCKGCF (Lock GPIO Pins Configuration). When set to 1, this bit locks the configuration registers
of all GPIO pins (see Section 3.10.3 on page 33) by disabling writes to all their bits (including the
LOCKGCF bit itself). The locked registers include the GPCFG (except LOCKCFP bit) and GPEVR
registers of all GPIO pins. Once set, this bit can only be cleared by Hardware reset.
0: R/W bits are enabled for write (default).
1: All bits are RO.
5-4
Reserved. These bits must be ‘01’.
3-2 R/W or IOWAIT (Number of I/O Wait States). These bits set the number of wait states for I/O transactions
RO through the LPC bus.
Bits
3 2
Number of Wait States
0 0:
0 1:
1 0:
0 (default)
2
6
1 1: 12
1
0
Reserved. This bit must be 0.
R/W or GLOBEN (Global Device Enable). This bit makes it possible to disable all logical devices by setting a
RO single bit (to 0). In addition, when the bit is set to 1, it enables the operation of all the logical devices
of the PC87382, as long as the logical device is itself enabled (see Table 7 on page 19). The behavior
of the different devices is explained in Section 3.3 on page 24.
0: All logical devices in the PC87382 are disabled and their resources are released.
1: Enables each PC87382 logical device that is itself enabled (default); see Section 3.3.1 on page 24.
3.7.3 SuperI/O Configuration 2 Register (SIOCF2)
This register is reset by hardware to 63h.
Location: Index 22h
Type:
R/W or RO
This register is reserved. It must be written with 63h
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3.0 Device Architecture and Configuration (Continued)
3.7.4 SuperI/O Configuration 6 Register (SIOCF6)
This register provides a fast way to disable one or more modules without having to access the Activate register of each; see
Section 3.3.1 on page 24.
Location: Index 26h
Type:
Varies per bit
Bit
7
LOCKFDS
0
6
5
4
Reserved
0
3
SER1DIS
0
2
IRDIS
0
1
0
0
0
Name
General-Purpose
Scratch
Reserved
Reset
0
0
Bit
Type
Description
7
R/W1 LOCKFDS (Lock Fast Disable Configuration). When set to 1, this bit locks itself, SER1DIS and IRDIS
S
bits in this register and GLOBEN bit in SIOCF1 register by disabling writing to all of these bits. Once set,
this bit can only be cleared by Hardware reset.
0: R/W bits are enabled for write (default).
1: All bits are RO.
6-5
4
R/W General-Purpose Scratch.
Reserved.
3
R/W SER1DIS (Serial Port 1 Disable).
or RO
0: Enabled or Disabled, according to Activation bit (default).
1: Disabled.
2
R/W IRDIS (Infrared Disable).
or RO
0: Enabled or Disabled, according to Activation bit (default).
1: Disabled.
1-0
Reserved.
3.7.5 SuperI/O Revision ID Register (SRID)
This register contains the ID number of the specific family member (Chip ID) and the chip revision number (Chip Rev).
Location: Index 27h
Type:
RO
Bit
7
0
6
Chip ID
0
5
0
4
3
2
Chip Rev
X
1
0
Name
Reset
X
X
X
X
Bit
Description
7-5 Chip ID.
4-0 Chip Rev. These bits identify the device revision.
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Revision1.2
3.0 Device Architecture and Configuration (Continued)
3.7.6 Clock Generator Control Register (CLOCKCF)
Location: Index 29h
Type:
Varies per bit
Bit
7
CKEN
0
6
5
4
3
2
0
1
Reserved
0
0
0
Name
Reset
CKOUTSEL CK48SEL CKVALID LOCKCCF
0
0
0
0
Bit
Type
Description
7
R/W or CKEN (Clock Enable). This bit enables the internal clock of the PC87382. If the clock source selected
RO by CK48SEL bit is the Clock Generator, CKEN enables the Clock Generator; otherwise it enables the
path from the CLKIN input pin.
0: Clock disabled (default).
1: Clock enabled.
6
5
R/W or CKOUTSEL (Clock Output Select). Selects the clock source to output on DCLKOUT pin.
RO
0: Select Clock Source from CLKIN pin (default).
1: Select Clock Generator Output. Valid only if CK48SEL field is set.
R/W or CK48SEL (48 MHz Clock Select). Selects the source of the internal 48 MHz clock.
RO
0: The source of the internal 48 MHz clock is CLKIN pin (default).
Use when CLKIN pin is connected to a 48 MHz clock source.
1: The source of the internal 48 MHz clock is the Clock Generator.
Use when CLKIN pin is connected to a 14.31818 MHz clock source.
4
3
RO CKVALID (Valid Clock Generator, Clock Status). This bit indicates the status of the on-chip, 48 MHz
Clock Generator and controls the generator output clock signal. The PC87382 modules using this clock
may be enabled (see Section 3.3.1 on page 24) only after this bit is read high (generator clock is valid).
0: Generator output clock frozen (default).
1: Generator output clock active (stable and toggling).
R/W1S LOCKCCF (Lock Clock Configuration). When set to 1, this bit locks the CLOCKCF register by
disabling writing to all its bits (including to the LOCKCCF bit itself). Once set, this bit can only be
cleared by Hardware reset.
0: The R/W bits are enabled for write (default).
1: All the bits are Read-Only.
2-0
Reserved.
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3.0 Device Architecture and Configuration (Continued)
3.8 INFRARED CONFIGURATION
3.8.1 Logical Device 2 (IR) Configuration
Table 15 lists the configuration registers that affect the Infrared. Only the last register (F0h) is described here. See Sections
3.2.3 and 3.2.4 for descriptions of the other registers.
Table 15. Infrared Configuration Registers
Index
Configuration Register or Action
Type
Reset
30h Activate. See also bit 0 of the SIOCF1 register and bit 2 of the SIOCF6 register. R/W
00h
02h
F8h
03h
03h
04h
04h
02h
60h Base Address MSB register. Bits 7-3 (for A15-11) are read only, 00000b.
61h Base Address LSB register. Bit 2-0 (for A2-0) are read only, 000b.
70h Interrupt Number and Wake-Up on IRQ Enable register.
71h Interrupt Type. Bit 1 is R/W; other bits are read only.
74h DMA Channel Select 0 (RX_DMA).
R/W
R/W
R/W
R/W
R/W
R/W
R/W
75h DMA Channel Select 1 (TX_DMA).
F0h Infrared Configuration register.
3.8.2 Infrared Configuration Register
This register is reset by hardware to 02h.
Location: Index F0h
Type:
R/W
Bit
7
6
0
5
0
4
3
0
2
1
0
Name
Bank
Select
Enable
Power
Mode
Control
Busy
Indicator
TRI-STATE
Control
Reserved
Reset
0
0
0
1
0
Bit
Description
7
Bank Select Enable. Enables bank switching for Infrared.
0: All attempts to access the extended registers in Infrared are ignored (default).
1: Enables bank switching for Infrared.
6-3 Reserved.
2
Busy Indicator. This read-only bit can be used by power management software to decide when to power down
the Infrared logical device.
0: No transfer in progress (default).
1: Transfer in progress.
1
Power Mode Control. When the logical device is active in:
0: Low power mode
Infrared clock disabled. The output signals are set to their default states. Registers are maintained (unlike
Active bit in Index 30, which also prevents access to Infrared registers).
1: Normal power mode
Infrared clock enabled. Infrared is functional when the logical device is active (default).
0
TRI-STATE Control. When enabled and the device is inactive, the logical device output pins are in TRI-STATE.
One exception is the IRTX pin, which is driven to 0 when Infrared is inactive and is not affected by this bit.
0: TRI-STATE disabled (default).
1: TRI-STATE enabled.
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3.0 Device Architecture and Configuration (Continued)
3.9 SERIAL PORT 1 CONFIGURATION
3.9.1 Logical Device 3 (SP1) Configuration
Table 16 lists the configuration registers that affect the Serial Port 1. Only the last register (F0h) is described here. See Sec-
tions 3.2.3 and 3.2.4 for descriptions of the other registers.
Table 16. Serial Port 1 Configuration Registers
Index
Configuration Register or Action
Type
Reset
30h Activate. See also bit 0 of the SIOCF1 register and bit 3 of the SIOCF6 register. R/W
00h
03h
F8h
04h
03h
04h
04h
02h
60h Base Address MSB register. Bits 7-3 (for A15-11) are read only, 00000b.
61h Base Address LSB register. Bit 2-0 (for A2-0) are read only, 000b.
70h Interrupt Number and Wake-Up on IRQ Enable register.
71h Interrupt Type. Bit 1 is R/W; other bits are read only.
74h Report no DMA Assignment.
R/W
R/W
R/W
R/W
RO
75h Report no DMA Assignment.
RO
F0h Serial Port 1 Configuration register.
R/W
3.9.2 Serial Port 1 Configuration Register
This register is reset by hardware to 02h.
Location: Index F0h
Type:
R/W
Bit
7
6
0
5
0
4
3
0
2
1
0
Name
Bank
Select
Enable
Power
Mode
Control
Busy
Indicator
TRI-STATE
Control
Reserved
Reset
0
0
0
1
0
Bit
Description
7
Bank Select Enable. Enables bank switching for Serial Port 1.
0: Disabled (default).
1: Enabled.
6-3 Reserved.
2
Busy Indicator. This read-only bit can be used by power management software to decide when to power down
the Serial Port 1 logical device.
0: No transfer in progress (default).
1: Transfer in progress.
1
Power Mode Control. When the logical device is active in:
0: Low power mode
Serial Port 1 clock disabled. The output signals are set to their default states. The RI input signal can be
programmed to generate an interrupt. Register values are maintained (unlike Active bit in Index 30, which also
prevents access to Serial Port 1 registers).
1: Normal power mode
Serial Port 1 clock enabled. Serial Port 1 is functional when the logical device is active (default).
0
TRI-STATE Control. When enabled and the device is inactive, the logical device output pins are in TRI-STATE.
0: Disabled (default).
1: Enabled.
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3.0 Device Architecture and Configuration (Continued)
3.10 GENERAL-PURPOSE INPUT/OUTPUT (GPIO) PORTS CONFIGURATION
3.10.1 General Description
The GPIO functional block includes eight pins arranged in two 8-bit ports:
ꢀ
Port 0 contains five GPIOE pins (i.e., GPIO pins with event detection).
ꢀ
Port 2 contains three GPIO pins (i.e., GPIO pins without event detection).
All pins in port 0 have full event detection capability, enabling them to trigger the assertion of IRQ signals. Pins in port 2 do
not have event detection capability. The runtime registers associated with the two ports are arranged in the GPIO address
space as shown in Table 17. The GPIO base address is 16-byte aligned. Address bits 3-0 are used to indicate the register
offset.
Table 17. Runtime Registers in GPIO Address Space
Offset
Mnemonic
GPDO0 GPIO Data Out 0
GPDI0 GPIO Data In 0
Register Name
Port Type
00h
01h
0
R/W
RO
02h
GPEVEN0 GPIO Event Enable 0
GPEVST0 GPIO Event Status 0
Reserved
R/W
03h
R/W1C
04h-07h
08h
GPDO2 Data Out 2
2
R/W
RO
09h
GPDI2
Data In 2
3.10.2 Implementation
The standard GPIO port with event detection capability (such as port 0) has four runtime registers. Each pin is associated
with a GPIO Pin Configuration register that includes seven configuration bits. Port 2 is a non-standard port that does not
support event detection, and therefore differs from the generic model as follows:
ꢀ
It has two runtime registers for basic functionality: GPDO2 and GPDI2. Event detection registers GPEVEN2 and
GPEVST2 are not available.
ꢀ
Only bits 3-0 are implemented in the GPIO Pin Configuration register of port 2. Bits 6-4, associated with the event
detection functionality, are reserved.
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3.0 Device Architecture and Configuration (Continued)
3.10.3 Logical Device 7 (GPIO) Configuration
Table 18 lists the configuration registers that affect the GPIO. Only the last three registers (F0h - F2h) are described here.
See Sections 3.2.3 and 3.2.4 for a detailed description of the other registers.
Table 18. GPIO Configuration Register
Index
Configuration Register or Action
Type
Reset
30h Activate. See also bit 7 of the SIOCF1 register.
60h Base Address MSB register.
R/W
R/W
00h
00h
00h
00h
03h
04h
04h
00h
61h Base Address LSB register. Bits 3-0 (for A3-0) are read only, 0000b.
70h Interrupt Number register.
R/W
R/W
71h Interrupt Type. Bit 1 is read/write. Other bits are read only.
74h Report no DMA assignment.
R/W
RO
75h Report no DMA assignment.
RO
F0h GPIO Pin Select register (GPSEL).
R/W
04h or 44h1
01h
F1h GPIO Pin Configuration register (GPCFG).
Varies per bit
F2h GPIO Pin Event Routing register (GPEVR).
1. Depending on port number
R/W or RO
Figure 7 shows the organization of these registers.
GPIO Pin Select Register
(Index F0h)
Port Select
Pin Select
Port 2, Pin 0
Port 0, Pin 0
Pin 0
Port 0
GPIO Pin
Configuration Register
(Index F1h)
Configuration Registers
Port 0, Pin 7
Port 2
Pin 7
Pin 0
Port 0, Pin 0
GPIO Pin Event
Routing Register
(Index F2h)
Event Routing
Registers
Port 0, Pin 7
Pin 7
Figure 7. Organization of GPIO Pin Registers
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3.0 Device Architecture and Configuration (Continued)
3.10.4 GPIO Pin Select Register (GPSEL)
This register selects the GPIO pin (port number and bit number) to be configured (i.e., which register is accessed via the
GPIO Pin Configuration register). It is reset by hardware to 00h.
Location: Index F0h
Type:
R/W
Bit
7
0
6
0
5
0
4
0
3
Reserved
0
2
0
1
PINSEL
0
0
0
Name
Reset
Reserved
PORTSEL
Bit
Description
7-6 Reserved.
5-4 PORTSEL (Port Select). These bits select the GPIO port to be configured:
Bits
5 4
GPIO Port
0 0: Port 0 (default)
0 1: Reserved
1 0: Port 2
1 1: Reserved
3
Reserved.
2-0 PINSEL (Pin Select). These bits select the GPIO pin to be configured in the selected port:
000, 001,... 111: Binary value of the pin number, 0, 1,... 7 respectively (default=0).
For port 2 only values 000,001,011 are legal.
3.10.5 GPIO Pin Configuration Register (GPCFG)
This register reflects, for both read and write, the register currently selected by the GPIO Pin Select register (GPSEL). All
the GPIO Pin registers that are accessed via this register have a common bit structure, as shown below. This register is
reset by hardware to 44h for port 0, and to 04h for port 2.
Location: Index F1h
Type:
Varies per bit
Port 0, bits 0-4 (with event detection capability)
Bit
7
Reserved
0
6
EVDBNC
1
5
EVPOL
0
4
EVTYPE
0
3
LOCKCFP
0
2
PUPCTL
1
1
OUTTYPE
0
0
OUTENA
0
Name
Reset
Port 2, bits 0,1,3 (without event detection capability)
Bit
7
6
5
4
0
3
LOCKCFP
0
2
PUPCTL
1
1
OUTTYPE
0
0
OUTENA
0
Name
Reset
Reserved
0
0
0
Bit
Type
Description
7
6
Reserved.
R/W or EVDBNC (Event Debounce Enable). (Ports 0 and 1 with event detection capability). Enables
RO transferring the signal only after a predetermined debounce period.
0: Disabled.
1: Enabled (default).
Reserved. (Port 2). Always 0.
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3.0 Device Architecture and Configuration (Continued)
Bit
Type
Description
5
R/W or EVPOL (Event Polarity). (Ports 0 and 1 with event detection capability). This bit defines the polarity of
RO the signal that issues an interrupt from the corresponding GPIO pin (falling/low or rising/high).
0: Falling edge or low level input (default).
1: Rising edge or high level input.
Reserved. (Port 2). Always 0.
4
3
R/W or EVTYPE (Event Type). (Ports 0 and 1 with event detection capability). This bit defines the type of the
RO signal that issues an interrupt from the corresponding GPIO pin (edge or level).
0: Edge input (default).
1: Level input.
Reserved. (Port 2). Always 0.
R/W1S LOCKCFP (Lock Configuration of Pin). When set to 1, this bit locks the GPIO pin configuration and
data (see also Section 5.4 on page 41) by disabling writing to itself, to GPCFG register bits PUPCTL,
OUTTYPE and OUTENA, and to the corresponding bit in GPDO register. Once set, this bit can only be
cleared by Hardware reset.
0: R/W bits are enabled for write (default).
1: All bits are RO.
2
R/W or PUPCTL (Pull-Up Control). This bit is used to enable/disable the internal pull-up capability of the
RO corresponding GPIO pin. It supports open-drain output signals with internal pull-ups and TTL input
signals.
0: Disabled.
1: Enabled (default).
1
0
R/W or
RO
(
OUTTYPE Output Type). This bit controls the output buffer type (open-drain or push-pull) of the
corresponding GPIO pin.
0: Open-drain (default).
1: Push-pull.
R/W or OUTENA (Output Enable). This bit indicates the GPIO pin output state. It has no effect on the input
RO path.
0: TRI-STATE (default).
1: Output enabled.
3.10.6 GPIO Event Routing Register (GPEVR)
This register enables the routing of the GPIO event to IRQ signals. It is implemented only for ports 0,1 which have event
detection capability. This register is reset by hardware to 00h.
Location: Index F2h
Type:
R/W
Bit
7
0
6
0
5
0
4
Reserved
0
3
0
2
0
1
0
0
EV2IRQ
0
Name
Reset
Bit
Description
7-1 Reserved.
0
EV2IRQ (Event to IRQ Routing). Controls the routing of the event from the selected GPIO pin to IRQ; see
Section 5.3.2 on page 40.
0: Disabled (default).
1: Enabled.
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3.0 Device Architecture and Configuration (Continued)
3.11 DOCKING LPC SWITCH CONFIGURATION
3.11.1 Logical Device 19 (DLPC) Configuration
Table 19 lists the configuration registers that affect the DLPC. See Sections 3.2.3 and 3.2.4 for descriptions of the registers
summarized below.
Table 19. DLPC Configuration Registers
Index
Configuration Register or Action
Type
Reset
30h Activate. See also bit 0 of the SIOCF1 register.
60h Base Address MSB register.
R/W
R/W
R/W
RO
00h
00h
00h
00h
00h
04h
04h
61h Base Address LSB register. Bit 0 (for A0) is read only, 0b.
70h Interrupt Number register. No Interrupt assignment.
71h Interrupt Type. No Interrupt assignment.
74h Report no DMA assignment.
RO
RO
75h Report no DMA assignment.
RO
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4.0 LPC Bus Interface
4.1 OVERVIEW
The LPC host Interface supports 8-bit I/O Read and Write and 8-bit DMA transactions, as defined in Intel’s LPC Interface
Specification, Revision 1.1.
4.2 LPC TRANSACTIONS
The LPC Interface of the PC87382 can respond to the following LPC transactions:
ꢀ
8-bit I/O read and write cycles
ꢀ
8-bit DMA read and write cycles
ꢀ
DMA request cycles
4.3 CLKRUN FUNCTIONALITY
The PC87382 supports the CLKRUN signal, which is implemented according to the specification in PCI Mobile Design
Guide, Revision 1.1, December 18, 1998. The PC87382 supports operation with both a slow and stopped clock in ACPI state
S0 (when the system is active but is not being accessed). In the following cases, the PC87382 drives the CLKRUN signal
low to force the LPC bus clock into full speed operation:
ꢀ
An IRQ is pending internally, waiting to be sent through the serial IRQ.
ꢀ
A DMA request is pending internally, waiting to be sent through the serial DMA.
Note: When the CLKRUN signal is not in use, the PC87382 assumes a valid clock on the LCLK pin.
4.4 INTERRUPT SERIALIZER
The Interrupt Serializer translates parallel interrupt request signals received from internal IRQ sources, into serial interrupt
request data transmitted over the SERIRQ bus.
The internal IRQs are fed into a Mapping, Enable and Polarity Control block, which maps them to their associated IRQ slots.
The IRQs are then fed into the Interrupt Serializer, where they are translated into serial data and transmitted over the SER-
IRQ bus.
The same slot cannot be shared among different interrupt sources in the device.
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5.0 General-Purpose Input/Output (GPIO) Port
This chapter describes one 8-bit port. A device may include a combination of several ports with different implementations.
For the device specific implementation, see Section 3.10 on page 32.
5.1 OVERVIEW
The GPIO port is an 8-bit port, which is based on eight pins. It features:
ꢀ
Software capability to manipulate and read pin levels
ꢀ
Controllable system notification by several means based on the pin level or level transition
ꢀ
Ability to capture and manipulate events and their associated status
ꢀ
Back-drive protected pins.
GPIO port operation is associated with two sets of registers:
ꢀ
Pin Configuration registers, mapped in the Device Configuration space. These registers are used to set up the logical
behavior of each pin. There are two 8-bit registers for each GPIO pin.
ꢀ
Four 8-bit runtime registers: GPIO Data Out (GPDO), GPIO Data In (GPDI), GPIO Event Enable (GPEVEN) and
GPIO Event Status (GPEVST). These registers are mapped in the GPIO device I/O space (which is determined by
the base address registers in the GPIO Device Configuration). They are used to manipulate and/or read the pin val-
ues, and to control and handle system notification. Each runtime register corresponds to the 8-pin port, such that bit
n in each one of the four registers is associated with GPIOXn pin, where X is the port number.
Each GPIO pin is associated with ten configuration bits and the corresponding bit slice of the four runtime registers, as
shown in Figure 8.
The functionality of the GPIO port is divided into basic functionality, which includes the manipulation and reading of the GPIO
pins, and enhanced functionality. Basic functionality is described in Section 5.2. Enhanced functionality, which includes
event detection and system notification, is described in Section 5.3.
Bit n
GPDOX
GPIOX Base Address
GPDIX
Runtime
8 GPCFG
Registers
GPEVENX
GPEVSTX
Registers
X = port number
n = pin number, 0 to 7
GPIO Pin
Configuration (GPCFG)
Register
GPIOXn
Pin
GPIOXn CNFG
GPIOXn
Port Logic
x8
Port and Pin
Select
GPIO Pin
Select (GPSEL)
Register
x8
8 GPEVR
Registers
Event
Pending
Indicator
Interrupt
Request
Event
Routing
Control
x8
GPIO Pin Event
Routing (GPEVR)
Register
GPIOXn ROUTE
Figure 8. GPIO Port Architecture
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5.0 General-Purpose Input/Output (GPIO) Port (Continued)
5.2 BASIC FUNCTIONALITY
The basic functionality of each GPIO pin is based on four configuration bits and a bit slice of runtime registers GPDO and
GPDI. The configuration and operation of a single GPIOXn pin (pin n in port X) is shown in Figure 9.
GPIO Device
Enable
Read Only
Data In
Static
Pull-Up
Push-Pull =1
Pin
Read/Write
Data Out
Internal
Bus
Pull-Up
Enable
Output
Enable
Output
Type
Pull-Up
Control
Lock
Bit 3
Bit 2
Bit 1
Bit 0
GPIO Pin Configuration (GPCFG) Register
Figure 9. GPIO Basic Functionality
5.2.1 Configuration Options
The GPCFG register controls the following basic configuration options:
• Port Direction - Controlled by the Output Enable bit (bit 0).
• Output Type - Push-pull vs. open-drain. It is controlled by Output Buffer Type (bit 1) by enabling/disabling the pull-up
portion of the output buffer.
• Weak Static Pull-Up - May be added to any type of port (input, open-drain or push-pull). It is controlled by Pull-Up Control
(bit 2).
• Pin Lock - GPIO pin may be locked to prevent any changes in the output value and/or the output characteristics. The
lock is controlled by Lock (bit 3). It disables writes to the GPDO register bits, and to bits 0-3 of the GPCFG register (In-
cluding the Lock bit itself). Once locked, it can be released by Hardware reset only.
5.2.2 Operation
The value that is written to the GPDO register is driven to the pin if the output is enabled. Reading from the GPDO register
returns its contents, regardless of the pin value or the port configuration. The GPDI register is a read-only register. Reading
from the GPDI register returns the pin value, regardless of what is driving it (the port itself, configured as an output port, or
the external device when the port is configured as an input port). Writing to this register is ignored.
Activation of the GPIO port is controlled by an external device-specific configuration bit (or a combination of bits). When the
port is inactive, access to GPDI and GPDO registers is disabled. However, there is no change in the port configuration and
in the GPDO value, and hence there is no effect on the outputs of the pins.
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5.0 General-Purpose Input/Output (GPIO) Port (Continued)
5.3 EVENT HANDLING AND SYSTEM NOTIFICATION
The enhanced GPIO port supports system notification based on event detection. This functionality is based on six configu-
ration bits and a bit slice of runtime registers GPEVEN and GPEVST. The configuration and operation of the event detection
capability is shown in Figure 10. System notification is shown in Figure 11.
GPIO
Event
Pending
Indication
GPIO
Status
1
0
Set
Read
Reset
R/W
Event
Enable
Write 1 to Clear
0
1
Rising
Edge
Detector
Input
Debouncer
Internal
Bus
Pin
Rising Edge or
High Level =1
Level =1
Event
Debounce
Enable
GPIO Pin Configuration Register
(GPCFG)
Event Type
Bit 4
Event Polarity
Bit 5
Bit 6
Figure 10. Event Detection
5.3.1 Event Configuration
Each pin in the GPIO port is a potential input event source. The event detection can trigger a system notification on prede-
termined behavior of the source pin. The GPCFG register determines the event detection trigger type for the system notifi-
cation.
Event Type and Polarity
Two trigger types of event detection are supported: edge and level. An edge event can be detected on a source pin transition
either from high to low or low to high. A level event may be detected when the source pin is at active level. The trigger type
is determined by Event Type (bit 4 of the GPCFG register). The direction of the transition (for edge) or the polarity of the
active level (for level) is determined by Event Polarity (bit 5 of the GPCFG register).
Active edge refers to a change in a GPIO pin level that matches the Event Polarity bit (1 for rising edge and 0 for falling
edge). Active level refers to the GPIO pin level that matches the Event Polarity bit (1 for high level and 0 for low level). The
corresponding bit in GPEVST register is set by hardware whenever an active edge or an active level is detected, regardless
of the GPEVEN register setting. Writing 1 to the Status bit clears it to 0. Writing 0 is ignored.
Event Debounce Enable
The input signal can be debounced for at least 16 msec before entering the Rising Edge detector. The signal state is trans-
ferred to the detector only after a debouncing period during which the signal has no transitions, to ensure that the signal is
stable. The debouncer adds 16 msec delay to both assertion and de-assertion of the event pending indicator. Therefore,
when working with a level event and system notification by IRQ, it is recommended to disable the debounce if the delay in
the IRQ de-assertion is not acceptable. The debounce is controlled by Event Debounce Enable (bit 6 of the GPCFG register).
5.3.2 System Notification
System notification on GPIO-triggered events is done by asserting an Interrupt Request (via the device’s Bus Interface).
The system notification for each GPIO pin is controlled by the corresponding bits in the GPEVEN and GPEVR registers.
System notification by a GPIO pin is enabled if the corresponding bit of the GPEVEN register is set to 1. The event routing
mechanism is shown in Figure 11.
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5.0 General-Purpose Input/Output (GPIO) Port (Continued)
GPIO Event Pending Indication
GPIO Event to
IRQ
Event
Routing
Logic
Routed Events
from other GPIO Pins
Enable
IRQ
Routing
GPIO Pin
Event Routing Register
(GPEVR)
Bit 0
Figure 11. GPIO Event Routing Mechanism
The GPEVST register reflects the event source pending status.
Active edge refers to a change in a GPIO pin level that matches the Event Polarity bit (1 for rising edge and 0 for falling
edge). Active level refers to the GPIO pin level that matches the Event Polarity bit (1 for high level and 0 for low level). The
corresponding bit of the GPEVST register is set by hardware whenever an active edge is detected, regardless of any other
bit settings. Writing 1 to the Status bit clears it to 0. Writing 0 is ignored.
A GPIO pin is in event pending state if the corresponding bit of the GPEVEN register is set and one of the following is true:
ꢀ
The Event Type is level and the pin is at active level.
ꢀ
The Event Type is edge and the corresponding bit of the GPEVST register is set.
The target means of system notification is asserted if at least one GPIO pin is in event pending state.
The selection of the target means of system notification is determined by the GPEVR register. If IRQ is selected as one of the
means for the system notification, the specific IRQ line is determined by the IRQ selection procedure of the device configura-
tion. The assertion of any means of system notification is blocked when the GPIO functional block is deactivated.
System event notification functionality is provided even when the GPIO pin is enabled as output.
A pending edge event may be cleared by clearing the corresponding GPEVST bit. However, a level event source must not
be released by software (except for disabling the source) as long as the pin is at active level. When a level event is used, it
is recommended to disable the input debouncer.
On de-activation of the GPIO port, the GPEVST register is cleared, and access to both the GPEVST and GPEVEN registers
is disabled. The target IRQ line is detached from the GPIO and de-asserted.
Before enabling any system notification, it is recommended to first set the desired event configuration and then verify that
the status registers are cleared.
5.4 GPIO PORT REGISTERS
The register maps in this chapter use the following abbreviations for Type:
ꢀ
R/W = Read/Write.
ꢀ
R
= Read from a specific address returns the value of a specific register. Write to the same address is to a
different register.
ꢀ
ꢀ
ꢀ
W
= Write.
RO
= Read Only.
R/W1C = Read/Write 1 to Clear. Writing 1 to a bit clears it to 0. Writing 0 has no effect.
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5.0 General-Purpose Input/Output (GPIO) Port (Continued)
5.4.1 GPIO Pin Configuration Registers Structure
For each GPIO Port, there is a group of eight identical sets of configuration registers. Each set is associated with one GPIO
pin. The entire group is mapped to the PnP configuration space. The mapping scheme is based on the GPSEL register (see
Section 3.10.4 on page 34), which functions as an index register for the pin, and the selected GPCFG and GPEVR registers,
which reflect the configuration of the currently selected pin (see Table 20).
Table 20. GPIO Configuration Registers
Index
Configuration Register or Action
Type
Reset
F0h GPIO Pin Select register (GPSEL)
R/W
00h
04h or 44h1
01h
F1h GPIO Pin Configuration register 1 (GPCFG)
Varies per bit
F2h GPIO Pin Event Routing register (GPEVR)
1. Depending on port number
R/W or RO
5.4.2 GPIO Port Runtime Register Map
Offset
Mnemonic
Register Name
GPIO Data Out
Type
R/W
Section
5.4.3
1
1
1
1
GPDO
GPDI
Device specific
Device specific
Device specific
Device specific
GPIO Data In
RO
5.4.4
GPEVEN
GPEVST
GPIO Event Enable
GPIO Event Status
R/W
5.4.5
R/W1C
5.4.6
1. The location of this register is defined in Section 3.10.3 on page 33.
5.4.3 GPIO Data Out Register (GPDO)
Location: Device specific
Type:
R/W
Bit
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
1
Name
DATAOUT
Reset
Bit
Description
7-0 DATAOUT (Data Out). Bits 7-0 correspond to pins 7-0 of the specific Port. The value of each bit determines the
value driven on the corresponding GPIO pin when its output buffer is enabled. Writing to the bit latches the
written data, unless the bit is locked by the GPCFG register Lock bit. Reading the bit returns its value regardless
of the pin value and configuration.
0: Corresponding pin driven to low.
1: Corresponding pin driven or released (according to buffer type selection) to high (default).
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5.0 General-Purpose Input/Output (GPIO) Port (Continued)
5.4.4 GPIO Data In Register (GPDI)
Location: Device specific
Type:
RO
Bit
7
6
5
4
3
2
1
0
Name
DATAIN
Reset
X
X
X
X
X
X
X
X
Bit
Description
7-0 DATAIN (Data In). Bits 7-0 correspond to pins 7-0 of the specific Port. Reading each bit returns the value of the
corresponding GPIO pin. Pin configuration and the GPDO register value may influence the pin value. Writes are
ignored.
0: Corresponding pin level low.
1: Corresponding pin level high.
5.4.5 GPIO Event Enable Register (GPEVEN)
Location: Device specific
Type:
R/W
Bit
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
Name
EVTENA
Reset
Bit
Description
7-0 EVTENA (Event Enable). Bits 7-0 correspond to pins 7-0 of the specific Port. Each bit enables system
notification by the corresponding GPIO pin. The bit has no effect on the corresponding Status bit in GPEVST
register.
0: Event pending by corresponding GPIO pin masked.
1: Event pending by corresponding GPIO pin enabled.
5.4.6 GPIO Event Status Register (GPEVST)
Location: Device specific
Type:
R/W1C
Bit
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
Name
EVTSTAT
Reset
Bit
Description
7−0 EVTSTAT (Event Status). Bits 7-0 correspond to pins 7-0 of the specific Port. The setting of each bit is
independent of the Event Enable bit in GPEVEN register. An active event sets the Status bit, which may be
cleared only by software writing 1 to the bit.
0: No active edge or level detected since last cleared.
1: Active edge or level detected.
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6.0 Docking LPC Switch
6.1 OVERVIEW
The Docking LPC Switch connects between the main platform LPC bus and the Docking Station LPC bus.
Features:
• Low switch resistance
• LDRQ output sharing between local and Docking DMA requests
• Docking LPC Device Reset control
• Programmable Clock to Reset Delay
• Prevents signal bouncing when the Docking Station is switched on
6.2 FUNCTIONAL DESCRIPTION
6.2.1 Basic Functionality
The Docking LPC Bus signals are divided into the following groups:
ꢀ
Immediate connection signals (DLCLK, DSERIRQ, DCLKRUN): These signals are connected via a low-resistance
switch to the main LPC bus.
ꢀ
Delayed connection signals (DLAD3-0, DLFRAME): These signals are connected via a low-resistance switch to the
main LPC bus. When enabled, the connection is established on LPC Idle detection following CLK2RST Timer expira-
tion.
ꢀ
DLRESET: Driven low starting from the time the switch is enabled until CLK2RST Timer expiration. After CLK2RST
Timer expiration, DLRESET reflects the LRESET pin value.
ꢀ
DCLKOUT: When the switch is enabled, DCLKOUT drives the Clock Generator output or clock from CLKIN input (de-
pending on bit 6 of CLOCKCF register; see Section 3.7.6 on page 29) to the Docking device. Otherwise, this pin is
not driven and is held high by an internal pull-up resistor.
ꢀ
DLDRQ: Combined with an internal DMA request on LDRQ output; see Section 6.2.2 on page 44.
The switch connection procedure is triggered by the following condition:
ꢀ
Bit 0 of DLCTL register is written with 1.
Following the switch trigger detection, the following sequence is performed as follows:
1. DLCLK, DSERIRQ, DCLKRUN signals are connected to LCLK, SERIRQ, CLKRUN signals, respectively. DCLKOUT out-
put driver is enabled. DLRESET output is held low (active). CLK2RST timer starts counting.
2. EXP bit of DLCTL register is set on CLK2RST counter reaching the value defined by CLK2RSTVAL field of DLCTL reg-
ister.
3. Host software must poll for the EXP bit. The switch connection is performed when the EXP bit is read with 1. In addition,
the Serial IRQ must be configured to Continuous mode during the switch activation.
4. DLRESET output is deactivated. DLFRAME and DLAD3-0 signals are connected to LFRAME and LAD3-0 signals, re-
spectively. LDRQ sharing mechanism is enabled; see Section 6.2.2.
All Docking LPC signals are held high by internal pull-up resistors while the corresponding switch is in open (disconnected)
state, except DLRESET, which is held low by pull-down resistor.
At VDD Power-up the switch is in disconnected state. Note that the switch state is not affected by the warm reset.
6.2.2 LDRQ Sharing Mechanism
The Docking Station DMA Request DLDRQ and the PC87382 internal DMA Request are combined on LDRQ output using
the LDRQ sharing mechanism. The mechanism performs arbitration between the two DMA Requests.
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Revision1.2
6.0 Docking LPC Switch (Continued)
6.3 DOCKING LPC SWITCH REGISTERS
The register maps in this chapter use the following abbreviations for Type:
ꢀ
R/W = Read/Write.
ꢀ
RO = Read Only.
6.3.1 Docking LPC Switch Register Map
Offset
Mnemonic
DLCTL
Register Name
Docking LPC Control
Reserved
Type
R/W
RO
Section
1
1
6.3.2
-
Device specific
Device specific
Reserved
1. The location of this register is defined in the Section 3.11.1 on page 36.
6.3.2 Docking LPC Control (DLCTL)
This register is reset by VDD Power-Up reset.
Location: Device specific
Type:
R/W
Bit
7
0
6
0
5
0
4
0
3
EXP
0
2
1
0
DLCON
0
Name
Reset
Reserved
CLK2RSTVAL
0
0
Bit
Type
Description
7-4
3
Reserved.
RO
EXP (Timer Expired). When set, this bit indicates that the CLK2RST timer expired. The bit is
cleared on the switch disconnection.
2-1
R/W CLK2RSTVAL (CLK2RST Timer Value). Defines the minimum time interval from the connection of
DLCLK until DLRESET de-assertion. The interval is measured in LCLK clock cycles.
Bits
2 1
Minimum Time Interval
0 0: 0 - the Timer is disabled (default)
0 1: 33*tCYC
1 0: 330*tCYC
1 1: 3300*tCYC
0
R/W DLCON (Docking LPC Connect). Setting this bit triggers the Docking LPC Connection procedure.
Clearing this bit disables the switch.
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7.0 Legacy Functional Blocks
This chapter briefly describes the following blocks, which provide legacy device functions:
ꢀ
Serial Port 1 (SP1)
ꢀ
Infrared (IR)
The description of each Legacy block includes the sections listed below. For details on the general implementation of each
legacy block, see the SuperI/O Legacy Functional Blocks Datasheet.
ꢀ
General Description
ꢀ
Register Map table(s)
ꢀ
Bitmap table(s)
The register maps in this chapter use the following abbreviations for Type:
ꢀ
R/W = Read/Write.
ꢀ
R
= Read from a specific address returns the value of a specific register. Write to the same address is to a
different register.
ꢀ
ꢀ
ꢀ
W
= Write.
RO
= Read Only.
R/W1C= Read/Write 1 to Clear. Writing 1 to a bit clears it to 0. Writing 0 has no effect.
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7.0 Legacy Functional Blocks (Continued)
7.1 SERIAL PORT 1 (SP1)
7.1.1
General Description
The Serial Port functional block supports serial data communication with a remote peripheral device or modem using a wired
interface. The Serial Port can function in one of three modes:
ꢀ
16450-Compatible mode (Standard 16450)
ꢀ
16550-Compatible mode (Standard 16550)
ꢀ
Extended mode
Extended mode provides advanced functionality for the UART.
The Serial Port provides receive and transmit channels that can operate concurrently in full-duplex mode. It performs all
functions required to conduct parallel data interchange with the system and composite serial data exchange with the external
data channel, including:
ꢀ
Format conversion between the internal parallel data format and the external programmable composite serial format
ꢀ
Serial data timing generation and recognition
ꢀ
Parallel data interchange with the system using a choice of bidirectional data transfer mechanisms
ꢀ
Status monitoring for all phases of communication activity
ꢀ
Complete MODEM-control capability.
Existing 16550-based legacy software is completely and transparently supported. Module organization and specific fallback
mechanisms switch the module to 16550-Compatible mode on reset or when initialized by 16550 software.
7.1.2
Register Bank Overview
Four register banks, each containing eight registers, control Serial Port operation. All registers use the same 8-byte address
space to indicate offsets 00h through 07h. The active bank must be selected by the software.
The register bank organization enables access to the banks as required for activation of all module modes, while maintaining
transparent compatibility with 16450 or 16550 software.
The Bank Selection register (BSR) selects the active bank and is common to all banks as shown in Figure 12. Therefore,
each bank defines seven new registers.
The default bank selection after system reset is 0.
BANK 3
BANK 2
BANK 1
BANK 0
Offset 07h
Offset 06h
Offset 05h
Offset 04h
Common
LCR/BSR
Register
Throughout
All Banks
Offset 02h
Offset 01h
Offset 00h
16550 Banks
Figure 12. Register Bank Architecture
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7.0 Legacy Functional Blocks (Continued)
7.1.3
SP1 Register Maps
Table 21. Bank 0 Register Map
Register Name
Offset
Mnemonic
Type
RXD
TXD
IER
Receiver Data
RO
W
00h
01h
02h
Transmitter Data
Interrupt Enable
Event Identification
FIFO Control
R/W
R
EIR
FCR
LCR
BSR
MCR
LSR
MSR
SPR
ASCR
W
Link Control
W
03h
Bank Select
R/W
R/W
R/W
R
04h
05h
06h
Modem/Mode Control
Link Status
Modem Status
Scratch Pad
R/W
RO
07h
Auxiliary Status and Control
Table 22. Bank 1 Register Map
Offset
Mnemonic
Register Name
Type
00h
LBGD(L)
Legacy Baud Generator Divisor (Low Byte)
R/W
R/W
01h
LBGD(H) Legacy Baud Generator Divisor (High Byte)
02h
Reserved
LCR/BSR Link Control/ Bank Select
Reserved
03h
R/W
04h-07h
Table 23. Bank 2 Register Map
Offset
Mnemonic
Register Name
Type
00h
01h
02h
03h
04h
05h
06h
07h
BGD(L)
Baud Generator Divisor (Low Byte)
R/W
R/W
R/W
R/W
R/W
BGD(H) Baud Generator Divisor (High Byte)
EXCR1
BSR
Extended Control 1
Bank Select
EXCR2
Extended Control 2
Reserved
TXFLV
RXFLV
TX_FIFO Level
RX_FIFO Level
RO
RO
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Revision1.2
7.0 Legacy Functional Blocks (Continued)
Table 24. Bank 3 Register Map
Offset
Mnemonic
Register Name
Type
00h
MRID
SH_LCR
SH_FCR
BSR
Module Identification and Revision ID
Shadow of LCR
RO
RO
01h
02h
Shadow of FIFO Control
Bank Select
RO
03h
R/W
04h-07h
Reserved
7.1.4
SP1 Bitmap Summary
Table 25. Bank 0 Bitmap
Bits
Register
Offset Mnemonic
7
6
5
4
3
2
1
0
00h
00h
RXD
TXD
RXD7-0
TXD7-0
IER1
IER2
EIR1
EIR2
FCR1
Reserved
MS_IE
MS_IE
RXFT
LS_IE
LS_IE
TXLDL_IE RXHDL_IE
TXLDL_IE RXHDL_IE
01h
Reserved
FEN1-0
TXEMP_IE Reserved
Reserved
IPR1-0
IPF
Reserved
RXFTH1-0
RXFTH1-0
TXEMP_EV Reserved
Reserved
MS_EV
LS_EV
TXSR
TXSR
STB
TXLDL_EV RXHDL_EV
02h
RXSR
RXSR
FIFO_EN
FIFO_EN
FCR2
LCR
BSR
TXFTH1-0
Reserved
PEN
BKSE
BKSE
SBRK
STKP
EPS
WLS1-0
03h
04h
BSR6-0
ISEN/
DCDLP
MCR1
Reserved
LOOP
RILP
RTS
DTR
MCR2
LSR
Reserved
TX_DFR
FE
Reserved
PE
RTS
OE
DTR
RXDA
DCTS
05h
06h
ER_INF
DCD
TXEMP
RI
TXRDY
DSR
BRK
CTS
MSR
DDCD
TERI
DDSR
SPR1
Scratch Data
Reserved
07h
ASCR2
RXF_TOUT
1. Non-Extended mode
2. Extended mode
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7.0 Legacy Functional Blocks (Continued)
Table 26. Bank 1 Bitmap
Register
Bits
Offset Mnemonic
7
6
5
4
3
2
1
0
00h
01h
02h
LBGD(L)
LBGD(H)
LBGD7-0
LBGD15-8
Reserved
LCR
BSR
BKSE
BKSE
SBRK
STKP
EPS
PEN
STB
WLS1-0
03h
BSR6-0
04h-07h
Reserved
Table 27. Bank 2 Bitmap
Bits
Register
Offset Mnemonic
7
6
5
4
3
2
1
0
00h
01h
02h
03h
04h
05h
06h
07h
BGD(L)
BGD(H)
EXCR1
BSR
BGD7-0
BGD15-8
LOOP
BTEST
BKSE
LOCK
Reserved ETDLBK
Reserved
EXT_SL
BSR6-0
EXCR2
Reserved
PRESL1-0
Reserved
Reserved
TXFLV
RXFLV
Reserved
Reserved
TFL4-0
RFL4-0
Table 28. Bank 3 Bitmap
Bits
Register
Offset Mnemonic
7
6
5
4
3
2
1
0
00h
01h
MRID
SH_LCR
SH_FCR
BSR
MID3-0
RID3-0
BKSE
SBRK
STKP
EPS
PEN
STB
WLS1-0
02h
RXFTH1-0
BKSE
TXFTH1-0
Reserved
BSR6-0
TXSR
RXSR
FIFO_EN
03h
04-07h
Reserved
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7.0 Legacy Functional Blocks (Continued)
7.2 IR FUNCTIONALITY (IR)
7.2.1 General Description
This functional block provides advanced, versatile serial communications features with IR capabilities. It supports six modes
of operation: UART, Sharp-IR, IrDA 1.0 SIR (hereafter SIR), Consumer Electronic IR (also called TV Remote or Consumer
remote control, hereafter CEIR), IrDA 1.1 MIR, and FIR. In UART mode, the Serial Port can function in 16450-Compatible
mode, 16550-Compatible mode, or Extended mode. This chapter describes general implementation of the Enhanced Serial
Port with Fast IR. For device specific implementation, see Device Architecture and Configuration in the datasheet of the rel-
evant device.
Note: UART operation of IR module is not supported in PC87382.
Existing 16550-based legacy software is completely and transparently supported. Organization and specific fallback mech-
anisms switch the Serial Port to 16550-Compatible mode on reset or when initialized by 16550 software.
This module has two DMA channels; the device can use either one or both of them. One channel is required for IR-based
applications, since IR communication works in half-duplex fashion. Two channels would normally be needed to handle high-
speed, full-duplex, UART-based applications.
7.2.2
Register Bank Overview
Eight register banks, each containing eight registers, control the module operation. All registers use the same 8-byte address
space to indicate offsets 00h-07h. The active bank must be selected by the software.
The register bank organization enables access to the banks as required for activation of all module modes, while maintaining
transparent compatibility with 16450 or 16550 software.
The Bank Selection register (BSR) selects the active bank and is common to all banks; see Figure 13. Therefore, each bank
defines seven new registers.
The default bank selection after system reset is 0.
BANK 7
BANK 6
Common
Register
Throughout
BANK 5
BANK 4
BANK 3
BANK 2
BANK 1
BANK 0
All Banks
Offset 07h
Offset 06h
Offset 05h
Offset 04h
LCR / BSR
Offset 02h
IR Special Banks
(Banks 4-7)
Offset 01h
Offset 00h
Figure 13. IR Register Bank Architecture
Table 29 shows the main functions of the registers in each bank. Banks 0-3 control both UART and IR modes of operation;
banks 4-7 control and configure the IR modes only.
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7.0 Legacy Functional Blocks (Continued)
Table 29. Register Bank Summary
Main Functions
Bank UART Mode
IR Mode
ꢀ
0
Global Control and Status
ꢀ
1
Legacy Bank
ꢀ
ꢀ
2
Alternative Baud Generator Divisor, Extended Control and Status
Module Revision ID and Shadow registers
IR mode setup
ꢀ
ꢀ
3
ꢀ
ꢀ
4
5
6
7
ꢀ
IR Control and Status FIFO
ꢀ
IR Physical Layer Configuration
CEIR and Optical Transceiver Configuration
ꢀ
ꢀ
The register maps in this chapter use the following abbreviations for Type:
ꢀ
R/W = Read/Write.
ꢀ
R = Read from a specific address returns the value of a specific register. Write to the same address is to a different
register.
ꢀ
W = Write.
ꢀ
RO = Read Only.
ꢀ
R/W1C = Read/Write 1 to Clear. Writing 1 to a bit clears it to 0. Writing 0 has no effect.
7.2.3
IR Register Map for IR Functionality
Table 30. Bank 0 Register Map
Offset Mnemonic
Register Name
Receiver Data
Type
00h
RXD
TXD
IER
RO
Transmitter Data
Interrupt Enable
Event Identification
FIFO Control
W
01h
02h
R/W
EIR
R
FCR
LCR
BSR
MCR
LSR
MSR
SPR
ASCR
W
03h
Link Control
W
R/W
Bank Select
04h
05h
06h
07h
Modem / Mode Control
Link Status
R/W
R/W
Modem Status
R
Scratch Pad
R/W
Auxiliary Status and Control
Varies per bit
Table 31. Bank 1 Register Map
Offset
Mnemonic
Register Name
Type
00h
LBGD(L)
Legacy Baud Generator Divisor (Low Byte)
R/W
R/W
01h
LBGD(H) Legacy Baud Generator Divisor (High Byte)
02h
Reserved
LCR/BSR Link Control / Bank Select
Reserved
03h
R/W
04h - 07h
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Revision1.2
7.0 Legacy Functional Blocks (Continued)
Table 32. Bank 2 Register Map
Offset
Mnemonic
Register Name
Type
00h
01h
02h
03h
04h
05h
06h
07h
BGD(L)
BGD(H)
EXCR1
BSR
Baud Generator Divisor (Low Byte)
Baud Generator Divisor (High Byte)
Extended Control1
Bank Select
R/W
R/W
R/W
R/W
R/W
EXCR2
Extended Control 2
Reserved
TXFLV
RXFLV
TX_FIFO Level
RO
RO
RX_FIFO Level
Table 33. Bank 3 Register Map
Register Name
Offset
Mnemonic
Type
00h
01h
02h
03h
MRID
SH_LCR
SH_FCR
BSR
Module Identification and Revision ID
Shadow of LCR
RO
RO
Shadow of FIFO Control
Bank Select
RO
R/W
04h-07h
Reserved
Table 34. Bank 4 Register Map
Register Name
Offset
Mnemonic
Type
00h
01h
02h
03h
04h
TMR(L)
TMR(H)
IRCR1
BSR
Timer (Low Byte)
Timer (High Byte)
IR Control 1
R/W
R/W
R/W
R/W
R/W
Bank Select
TFRL(L)/
TFRCC(L)
Transmitter Frame Length (Low Byte) /
Transmitter Frame Current Count (Low Byte)
05h
06h
07h
TFRL(H)/
TFRCC(H)
Transmitter Frame Length (High Byte) /
Transmitter Frame Current Count (High Byte)
R/W
R/W
R/W
RFRML(L)/
RFRCC(L)
Receiver Frame Maximum Length (Low Byte) /
Receiver Frame Current Count (Low Byte)
RFRML(H)/
RFRCC(H)
Receiver Frame Maximum Length (High Byte) /
Receiver Frame Current Count (High Byte)
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7.0 Legacy Functional Blocks (Continued)
Table 35. Bank 5 Register Map
Register Name
Offset
Mnemonic
Type
00h
01h
02h
03h
04h
05h
06h
07h
SPR2
SPR3
Scratch Pad 2
Scratch Pad 3
R/W
R/W
Reserved
BSR
Bank Select
IR Control 2
Frame Status
R/W
R/W
RO
IRCR2
FRM_ST
RFRL(L)/LSTFRC Received Frame Length (Low Byte) / Lost Frame Count
RO
RFRL(H)
Received Frame Length (High Byte)
RO
Table 36. Bank 6 Register Map
Register Name
Offset
Mnemonic
Type
00h
01h
02h
03h
04h
IRCR3
MIR_PW
SIR_PW
BSR
IR Control 3
R/W
R/W
R/W
R/W
R/W
MIR Pulse Width Control
SIR Pulse Width Control
Bank Select
BFPL
Beginning Flags / Preamble Length
05h-07h
Reserved
Table 37. Bank 7 Register Map
Register Name
Offset
Mnemonic
Type
00h
01h
02h
03h
04h
05h
06h
07h
IRRXDC
IRTXMC
RCCFG
BSR
IR Receiver Demodulator Control
IR Transmitter Modulator Control
CEIR Configuration
R/W
R/W
R/W
Bank Select
R/W
IRCFG1
IR Interface Configuration 1
Varies per bit
Reserved
Reserved
IRCFG4
IR Interface Configuration 4
R/W
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Revision1.2
7.0 Legacy Functional Blocks (Continued)
7.2.4 IR Bitmap Summary for IR Functionality
Table 38. Bank 0 Bitmap
Register
Bits
Offset Mnemonic
7
6
5
4
3
2
1
0
00h
00h
01h
RXD
TXD
RXD7-0
TXD7-0
IER1
IER2
Reserved
SFIF_IE TXEMP_IE DMA_IE
MS_IE
MS_IE
LS_IE
TXLDL_IE RXHDL_IE
TXLDL_IE RXHDL_IE
TMR_IE
LS_IE/
TXHLT_IE
EIR1
EIR2
02h
FEN1-0
Reserved
RXFT
IPR1-0
IPF
TMR_EV
SFIF_EV TXEMP_EV DMA_EV
MS_EV
LS_EV/ TXLDL_EV RXHDL_EV
TXHLT_EV
FCR1
RXFTH1-0
RXFTH1-0
Reserved
TXFTH1-0
TXSR
TXSR
STB
RXSR
RXSR
FIFO_EN
FIFO_EN
FCR2
LCR
BSR
Reserved
03h
04h
BKSE
BKSE
SBRK
STKP
EPS
PEN
WLS1-0
BSR6-0
MCR1
Reserved
LOOP
ISEN/
DCDLP
RILP
RTS
DTR
MCR2
LSR
MDSL2-0
TXEMP
IR_PLS
BRK/
TX_DFR DMA_EN
RTS
OE
DTR
05h
ER_INF/
FR_END
TXRDY
DSR
FE/ PE/
RXDA
MAX_LEN PHY_ERR BAD_CRC
06h
07h
MSR
SPR1
DCD
RI
CTS
DDCD
TERI
DDSR
DCTS
Scratch Data
ASCR2
CTE
TXUR
RXACT/
RXBSY
RXWDG/
LOST_FR
TXHFE
S_EOT FEND_INF RXF_TOUT
1. Non-Extended mode
2. Extended mode
Table 39. Bank 1 Bitmap
Bits
Register
Offset
Mnemonic
7
6
5
4
3
2
1
0
00h
01h
02h
03h
LBGD(L)
LBGD(H)
LBGD7-0
LBGD15-8
Reserved
LCR
BSR
BKSE
BKSE
SBRK
STKP
EPS
PEN
STB
WLS1-0
BSR6-0
04-07h
Reserved
Revision 1.2
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7.0 Legacy Functional Blocks (Continued)
Table 40. Bank 2 Bitmap
Register
Bits
Offset Mnemonic
7
6
5
4
3
2
1
0
00h
01h
02h
03h
04h
BGD(L)
BGD(H)
EXCR1
BSR
BGD7-0
BGD15-8
BTEST
BKSE
LOCK
Reserved ETDLBK
LOOP
DMASWP
BSR6-0
DMATH
DMANF
EXT_SL
EXCR2
Reserved
PRESL1-0
RF_SIZ1-0
TF_SIZ1-0
05h
Reserved
06h
07h
TXFLV
RXFLV
Reserved
Reserved
TFL5-0
RFL5-0
Table 41. Bank 3 Bitmap
Bits
Register
Offset Mnemonic
7
6
5
4
3
2
1
0
00h
01h
02h
03h
MRID
SH_LCR
SH_FCR
BSR
MID3-0
RID3-0
BKSE
SBRK
STKP
EPS
PEN
STB
WLS1-0
RXFTH1-0
TXFTH1-0
Reserved
BSR6-0
TXSR
RXSR
FIFO_EN
BKSE
04h-07h
Reserved
Table 42. Bank 4 Bitmap
Register
Offset Mnemonic
Bits
7
6
5
4
3
2
1
0
00h
01h
02h
03h
04h
TMR(L)
TMR(H)
IRCR1
BSR
TMR7-0
Reserved
Reserved
TMR11-8
CTEST
IR_SL1-0
BSR6-0
TFRL7-0 /TFRCC7-0
TMR_EN
BKSE
TFRL(L)/
TFRCC(L)
05h
06h
07h
TFRL(H)/
TFRCC(H)
Reserved
TFRL12-8 / TFRCC12-8
RFRML7-0 / RFRCC7-0
RFRML12-8 / RFRCC12-8
RFRML(L)/
RFRCC(L)
RFRML(H)/
RFRCC(H)
Reserved
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Revision1.2
7.0 Legacy Functional Blocks (Continued)
Table 43. Bank 5 Bitmap
Bits
Register
Offset Mnemonic
7
6
5
4
3
2
1
0
00h
01h
02h
03h
04h
05h
06h
SPR2
SPR3
Scratch Pad 2
Scratch Pad 3
Reserved
BSR
BKSE
Reserved
VLD
BSR6-0
FEND_MD AUX_IRRX TX_MS
IRCR2
SFTSL
MDRS
IRMSSL IR_FDPLX
FRM_ST
LOST_FR Reserved MAX_LEN PHY_ERR BAD_CRC
RFRL7-0 / LSTFRC7-0
OVR1
OVR2
RFRL(L)/
LSTFRC
07h
RFRL(H)
Reserved
RFRL12-8
Table 44. Bank 6 Bitmap
Bits
Register
Offset Mnemonic
7
6
5
4
3
2
1
0
00h
01h
02h
03h
04h
IRCR3
MIR_PW
SIR_PW
BSR
SHDM_DS SHDM_DS FIR_CRC MIR_CRC Reserved TXCRC_INV TXCRC_DS Reserved
Reserved
Reserved
MPW3-0
SPW3-0
BKSE
BSR6-0
BFPL
MBF7-4
FPL3-0
05h-07h
Reserved
Table 45. Bank 7 Bitmap
Bits
Register
Offset Mnemonic
7
6
5
4
3
2
1
0
00h
01h
02h
03h
04h
IRRXDC
IRTXMC
RCCFG
BSR
DBW2-0
MCPW2-0
T_OV
DFR4-0
MCFR4-0
TXHSC
R_LEN
BKSE
RXHSC RCDM_DS Reserved
BSR6-0
RC_MMD1-0
IRCFG1
STRV_MS Reserved
SIRTX
IRRX1
Level
IRID3
IRIC2-0
05h
06h
07h
Reserved
Reserved
IRCFG4
Reserved IRRX_MD IRSL0_DS
RXINV IRSL21_DS
Reserved
Revision 1.2
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8.0 Device Characteristics
8.1 GENERAL DC ELECTRICAL CHARACTERISTICS
8.1.1 Recommended Operating Conditions
Symbol
VDD
Parameter
Min
3.0
0
Typ
Max
3.6
Unit
V
Supply Voltage
3.3
TA
Operating Temperature
+70
°C
8.1.2 Absolute Maximum Ratings
Absolute maximum ratings are values beyond which damage to the device may occur. Unless otherwise specified, all volt-
ages are relative to ground.
Symbol
VDD
Parameter
Conditions
Min
−0.5
−0.5
Max
+4.1
Unit
V
Supply Voltage
Input Voltage
Input Voltage
VI
VDD + 0.5
V
All other pins
−0.5
−0.5
5.5
V
V
VI
LPC and DLPC pins1
VDD + 0.5
VO
Output Voltage
−0.5
−65
VDD + 0.5
+165
V
°C
TSTG Storage Temperature
PD
TL
Power Dissipation
500
mW
°C
Lead Temperature Soldering (10 s)
ESD Tolerance
+260
CZAP = 100 pF
RZAP = 1.5 KΩ2
2000
V
1. LCLK, LAD3-0, LFRAME, LRESET, SERIRQ, LDRQ, CLKRUN, DLCLK, DLAD3-0,
DLFRAME, DSERIRQ, DCLKRUN
2. Value based on test complying with RAI-5-048-RA human body model ESD testing.
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Revision1.2
8.0 Device Characteristics (Continued)
8.1.3 Capacitance
Min2
Typ1
Max2
12
Symbol
Parameter
Unit
CLCLK
CPIN
LCLK Pin Capacitance
Other Pins Capacitance
5
8
8
pF
pF
10
1. TA = 25°C, f = 1 MHz
2. Not tested. Guaranteed by design
8.1.4 Power Consumption under Recommended Operating Conditions
Symbol
Parameter
Conditions
Typ
Max
Unit
VDD Average Main Supply Current
VIL = 0.5 V, VIH = 2.4 V
No Load
IDD
8
10
mA
VDD Quiescent Main Supply Current VIL = VSS, VIH = VDD
IDDLP
1.5
2
mA
in Low Power Mode
No Load
8.1.5 Voltage Thresholds
Symbol
Parameter1
Min2
2.2
Max2
Typ
Unit
VDDON
VDD Detected as Power-on
VDD Detected as Power-off
2.6
2.5
2.9
2.8
V
V
VDDOFF
2.1
1. All parameters specified for 0°C ≤ TA ≤ 70°C.
2. Not tested. Guaranteed by characterization.
8.2 DC CHARACTERISTICS OF PINS, BY I/O BUFFER TYPES
The following tables summarize the DC characteristics of all device pins described in the Chapter 1.2 on page 9. The char-
acteristics describe the general I/O buffer types defined in Table 1. For exceptions, refer to Section 8.2.8. The DC charac-
teristics of the system interface meet the PCI2.2 3.3V DC signaling.
8.2.1 Input, PCI 3.3V
Symbol: INPCI
Symbol
Parameter
Input High Voltage
Conditions
Min
Max
Unit
VDD + 0.51
0.3VDD
±1
VIH
0.5VDD
V
−0.51
VIL
Input Low Voltage
V
2
Input Leakage Current
0 < Vin < VDD
µA
lIL
1. Not tested. Guaranteed by design.
2. Input leakage currents include hi-Z output leakage for all bidirectional buffers with TRI-STATE outputs.
Revision 1.2
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8.0 Device Characteristics (Continued)
8.2.2 Input, TTL Compatible
Symbol: INT
Symbol
VIH
Parameter
Input High Voltage
Conditions
Min
Max
Unit
V
5.51
0.8
2.0
−0.51
VIL
Input Low Voltage
V
Input Leakage Current
VIN = VDD
VIN = VSS
1
µA
µA
IIL
−1
1. Not tested. Guaranteed by design.
8.2.3 Input, TTL Compatible with Schmitt Trigger
Symbol: INTS
Symbol
VIH
Parameter
Input High Voltage
Conditions
Min
Max
Unit
V
5.51
0.8
2.0
1
VIL
Input Low Voltage
V
−0.5
Input Leakage Current
VIN = VDD
VIN = VSS
1
µA
µA
mV
IIL
−1
2502
VH
Input Hysteresis
1. Not tested. Guaranteed by design.
2. Not tested. Guaranteed by characterization.
8.2.4 Output, PCI 3.3V
Symbol: OPCI
Symbol
VOH
Parameter
Output High Voltage
Output Low Voltage
Conditions
lout = −500 µA
lout =1500 µA
Min
Max
Unit
V
0.9VDD
VOL
0.1 VDD
V
8.2.5 Output, Push-Pull Buffer
Symbol: Op/n
Output, push-pull buffer that is capable of sourcing p mA and sinking n mA.
Symbol
VOH
Parameter
Output High Voltage
Output Low Voltage
Conditions
IOH = −p mA
IOL = n mA
Min
Max
Unit
V
2.4
VOL
0.4
V
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Revision1.2
8.0 Device Characteristics (Continued)
8.2.6 Output, Open-Drain Buffer
Symbol: ODn
Output, Open-Drain output buffer, capable of sinking n mA. Output from these signals is open-drain and cannot be forced high.
Symbol
Parameter
Output Low Voltage
Conditions
Min
Max
Unit
VOL
IOL = n mA
0.4
V
8.2.7 Quick Switch
Symbol: QS.
Symbol
Parameter
Switch On Resistance1
Conditions
VIN = 0V
Typ
5
Max
10
Unit
Ω
RON
VIN = VDD
Switch is on
5
10
Ω
IIL
Input Leakage Current
±10
µA
1. Not tested. Guaranteed by characterization.
8.2.8 Exceptions
1. All pins are 5V tolerant except for the pins with PCI (INPCI, OPCI) and Quick Switch (QS) buffer types.
2. All pins are back-drive protected, except for the pins with PCI (INPCI, OPCI) buffer types.
3. The following pins have an internal static pull-up resistor (when enabled) and therefore may have leakage current from
VDD (when VIN = 0): GPIO00-04, GPIO20-21, GPIO23, DLCLK, DLAD3-0, DLFRAME, DSERIRQ, DLDRQ, DCLKRUN,
DCLKOUT.
4. The following pins have an internal static pull-down resistor (when enabled) and therefore may have leakage current to
VSS (when VIN = VDD): DLRESET.
5. The following strap pins have an internal static pull-up resistor enabled during VDD Power-Up reset and therefore may
have leakage current to VDD (when VIN = 0): BADDR, TRIS, TEST.
6. IOH is valid for a GPIO pin only when it is not configured as open-drain.
7. In XOR Tree mode, the buffer type of the input pins participating in the XOR Tree (see Section 2.4.2 on page 16) is INT
(Input, TTL compatible), regardless of the buffer type of these pins in normal device operation mode; see Section 1.3 on
page 10.
8.2.9 Terminology
Back-Drive Protection. A pin that is back-drive protected does not sink current into the supply when an input voltage higher
than the supply, but below the pin’s maximum input voltage, is applied to the pin. This is true even when the supply is inac-
tive. Note that active pull-up resistors and active output buffers are typically not back-drive protected.
5-Volt Tolerance. An input signal that is 5V tolerant can operate with input voltage of up to 5V even though the supply to
the device is only 3.3V. The actual maximum input voltage allowed to be supplied to the pin is indicated by the maximum
high voltage allowed for the input buffer. Note that some pins have multiple buffers, not all of which are 5V tolerant. In such
cases, there is a note that indicates at what conditions a 5V input may be applied to the pin; if there is no note, the low max-
imum voltage among the buffers is the maximum voltage allowed for the pin.
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8.0 Device Characteristics (Continued)
8.3 INTERNAL RESISTORS
DC Test Conditions
Pull-Up Resistor Test Circuit
Pull-Down Resistor Test Circuit
VSUP
VSUP
VSUP
Device
Device
IPU
A
IPD
A
Under
Test
Under
Test
RPU
Pin
Pin
RPD
V
V
VPIN
VPIN
Figure 14. Internal Resistor Test Conditions, TA = 0°C to 70°C, VSUP = 3.3V
VSUP
VSUP
VSUP
V
> V
V
< V
PIN IL
PIN
IH
Device
Under
Test
Device
Under
Test
10 µA
IPU
RPU
IPU
RPU
Pin
Pin
A
A
V
V
10 KΩ
10 µA
VPIN
VPIN
Figure 15. Internal Pull-Down Resistor for Straps, TA = 0°C to 70°C, VSUP = 3.3V
Notes for Figures 14 and 15:
1. The equivalent resistance of the pull-up resistor is calculated by RPU = (VSUP − VPIN) / IPU
.
2. The equivalent resistance of the pull-down resistor is calculated by RPD = VPIN / IPD
.
8.3.1 Pull-Up Resistor
Symbol: PUnn
Conditions1
Min2
Max2
Symbol
Parameter
Typical
Unit
RPU
Pull-up equivalent resistance
VPIN = 0V
nn − 30%
nn
nn + 30%
nn − 38%
KΩ
KΩ
3
VPIN = 0.8 VSUP
3
nn − 35%
KΩ
VPIN = 0.17 VSUP
1. TA = 0°C to 70°C, VSUP = 3.3V.
2. Not tested. Guaranteed by characterization.
3. For strap pins only.
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Revision1.2
8.0 Device Characteristics (Continued)
8.3.2 Pull-Down Resistor
Symbol: PDnn
Conditions1
Min2
Max2
Symbol
Parameter
Typical
Unit
RPD
Pull-down equivalent resistance
VPIN = VSUP
nn − 30%
nn
nn + 30%
KΩ
1. TA = 0°C to 70°C, VSUP = 3.3V.
2. Not tested. Guaranteed by characterization.
8.4 AC ELECTRICAL CHARACTERISTICS
8.4.1 AC Test Conditions
Load Circuit (Notes 1, 2)
AC Testing Input, Output Waveform
VDD
S1
2.4
2.0
0.8
2.0
0.8
0.1 µF
Test Points
0.4
RL
Device
Input
Output
Under
Test
CL
Figure 16. AC Test Conditions, TA = 0 °C to 70 °C, VDD = 3.3 V ±10%
Notes:
1. CL = 50 pF for all output pins; this value includes both jig and oscilloscope capacitance.
2. S1 = Open for push-pull output pins.
S1 = VDD for high impedance to active low and active low to high impedance measurements.
S1 = GND for high impedance to active high and active high to high impedance measurements.
RL = 1.0 KΩ for all the pins.
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8.0 Device Characteristics (Continued)
8.4.2 Clock Input Timing
48 MHz
14.31818 MHz
Symbol
Parameter
Min
6
Max
Min
29.5
29.5
Max
Unit
ns
Clock High Pulse Width1
Clock Low Pulse Width1
tCH
tCL
6
ns
2
tCP
FCIN
tCR
tCF
20
21.5
ns
69.14
70.54
Clock Period
Clock Frequency
48 - 0.1%
48 + 0.1%
14.31818 - 0.02% 14.31818 + 0.02% MHz
Clock Rise Time2 (0.8V-2.0V)
Clock Fall Time2 (2.0V-0.8V)
5
5
5
5
ns
ns
1. Not tested. Guaranteed by characterization.
2. Not tested. Guaranteed by design.
.
tCP
tCH
VIH
VIH
VIH
VIL
CLKIN
VIL
VIL
tCL
tCF
tCR
8.4.3 Clock Output Timing
From Clock Generator
From CLKIN
Symbol
Parameter
Min
Max
Min
tCH - 1
tCL - 1
tCP - 0.5
FCIN
Max
Unit
ns
Clock High Pulse Width1
Clock Low Pulse Width1
tCOH
tCOL
6
6
20
ns
Clock Period2
tCOP
FCOUT
tCOR
tCOF
21.5
tCP + 0.5
ns
Clock Frequency
48 - 0.1%
48 + 0.1%
FCIN
MHz
ns
Clock Rise Time1 (0.4V-2.4V)
Clock Fall Time1 (2.4V-0.4V)
5
5
5
5
ns
1. Not tested. Guaranteed by characterization.
2. Not tested. Guaranteed by design.
.
tCOH
tCOP
VOH
VOH
VOH
VOH
DCLKOUT
VOL
VOL
VIL
tCOL
tCOF
tCOR
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Revision1.2
8.0 Device Characteristics (Continued)
8.4.4 LCLK and LRESET
Symbol
Parameter
Min
Max
Units
1
LCLK Cycle Time
30
ns
tCYC
LCLK High Time2
LCLK Low Time2
LCLK Slew Rate3,4
tHIGH
11
11
1
ns
ns
tLOW
-
-
4
V/ns
mV/ns
ns
LRESET Slew Rate3,5
LRESET pulse width
50
100
tWRST
1. The PCI may have any clock frequency between nominal DC and 33 MHz.
Device operational parameters at frequencies under 16 MHz can be guaranteed
by design rather than by testing. The clock frequency can be changed at any
time during the operation of the system as long as the clock edges remain
“clean” (monotonic) and the minimum cycle and high and low times are not vio-
lated. The clock may only be stopped in a low state.
2. Not tested. Guaranteed by characterization.
3. Not tested. Guaranteed by design
4. Rise and fall times are specified in terms of the edge rate measured in V/ns.
This slew rate must be met across the minimum peak-to-peak portion of the
clock wavering as shown below.
5. The minimum LRESET slew rate applies only to the rising (de-assertion) edge of
the reset signal, and ensures that system noise cannot render an otherwise
monotonic signal to appear to bounce in the switching range.
3.3V Clock
tHIGH
tLOW
0.6 VDD
0.5 VDD
0.4 VDD
0.3 VDD
0.4 VDD p-to-p
(minimum)
0.2 VDD
tCYC
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8.0 Device Characteristics (Continued)
8.4.5
V
Power-Up Reset
DD
Min1
Max1
Symbol
Description
Reference Conditions
tIRST Internal Power-Up reset time VDD power-up to end of internal reset
tLRST LRESET active time VDD power-up to end of PCI_RESET
Internal strap pull-up resistor, Before end of internal reset
valid time2
tLRST
10 ms
tIRST
tIPLV
External strap pull-up resistor, Before end of internal reset
valid time
tEPLV
tIRST
1. Not tested. Guaranteed by design.
2. Active only during VDD Power-Up reset.
VDDONmin
VDD (Power)
tIRST
tLRST
tIPLV
VDD Power-Up Reset
(Internal)
LRESET
Internal Straps
(Pull-up)
tEPLV
External Straps
(Pull-Down)
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66
Revision1.2
8.0 Device Characteristics (Continued)
8.4.6 LPC and SERIRQ Signals
Symbol
tVAL
tON
Description
Output Valid Delay
Float to Active Delay
Active to Float Delay
Input Setup Time
Input Hold Time
Reference Conditions
After RE LCLK
Min
2
Max
Unit
ns
11
After RE LCLK
2
ns
tOFF
tSU
After RE LCLK
28
ns
Before RE LCLK
After RE LCLK
7
0
ns
tHI
ns
Output
LCLK
tVAL
tON
LPC Signals/
SERIRQ
tOFF
Input
LCLK
tSU
tHI
LPC Signals/
SERIRQ
Input
Valid
Revision 1.2
67
www.national.com
8.0 Device Characteristics (Continued)
8.4.7 Serial Port, Sharp-IR, SIR and Consumer Remote Control Timing
Min1
Max1
Symbol
Parameter
Conditions
Unit
2
tBT
Single Bit Time in Serial Port and Sharp-IR
tBTN + 25
Transmitter
Receiver
ns
ns
ns
ns
ns
tBTN − 25
tBTN − 2%
tBTN + 2%
tCWN + 25
3
tCMW
Modulation Signal Pulse Width in Sharp-IR
and Consumer Remote Control
Transmitter
Receiver
tCWN
− 25
500
4
tCMP
Modulation Signal Period in Sharp-IR and
Consumer Remote Control
tCPN + 25
Transmitter
tCPN − 25
5
5
Receiver
ns
ns
tMMIN
tMMAX
(3/16) x tBTN − 15
(3/16) x tBTN + 15
2
2
tSPW
SIR Signal Pulse Width
Transmitter,
Variable
Transmitter,
Fixed
1.48
1.78
µs
µs
Receiver
Transmitter
Receiver
1
SDRT
SIR Data Rate Tolerance.
% of Nominal Data Rate.
± 0.87%
± 2.0%
± 2.5%
± 6.5%
tSJT
SIR Leading Edge Jitter.
% of Nominal Bit Duration.
Transmitter
Receiver
1. Not tested. Guaranteed by design.
2. tBTN is the nominal bit time in Serial Port, Sharp-IR, SIR and Consumer Remote Control modes. It is deter-
mined by the setting of the Baud Generator Divisor registers.
3. tCWN is the nominal pulse width of the modulation signal for Sharp-IR and Consumer Remote Control modes. It
is determined by the MCPW field (bits 7-5) of the IRTXMC register and the TXHSC bit (bit 2) of the RCCFG
register.
4. tCPN is the nominal period of the modulation signal for Sharp-IR and Consumer Remote Control modes. It is
determined by the MCFR field (bits 4-0) of the IRTXMC register and the TXHSC bit (bit 2) of the RCCFG regis-
ter.
5. tMMIN and tMMAX define the time range within which the period of the in-coming subcarrier signal must fall for
the signal to be accepted by the receiver. These time values are determined by the contents of the IRRXDC
register and the setting of the RXHSC bit (bit 5) of the RCCFG register.
t
BT
Serial Port
t
t
CMP
CMW
Sharp-IR
Consumer Remote Control
t
SPW
SIR
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68
Revision1.2
8.0 Device Characteristics (Continued)
8.4.8 MIR and FIR Timing
Min1
− 25
Max1
Symbol
Parameter
Conditions
Transmitter
Receiver
Unit
nsec
nsec
2
tMPW
MIR Signal Pulse Width
tMWN + 25
tMWN
60
MDRT
tMJT
MIR Transmitter Data Rate Tolerance
± 0.1%
± 2.9%
MIR Receiver Edge Jitter, % of Nominal Bit Duration
tFPW
FIR Signal Pulse Width
Transmitter
Receiver
120
90
130
160
nsec
nsec
nsec
nsec
tFDPW
FIR Signal Double Pulse Width
Transmitter
Receiver
245
215
255
285
FDRT
tFJT
FIR Transmitter Data Rate Tolerance
± 0.01%
FIR Receiver Edge Jitter, % of Nominal Bit Duration
1. Not tested. Guaranteed by design.
± 4.0%
2. tMWN is the nominal pulse width for MIR mode. It is determined by the M_PWID field (bits 4-0) in the MIR_PW
register at offset 01h in bank 6.
t
t
MPW
MIR
FIR
Data
Symbol
t
FDPW
FPW
Chips
Figure 17. MIR and FIR Timing
Revision 1.2
69
www.national.com
8.0 Device Characteristics (Continued)
8.4.9 Modem Control Timing
Symbol
Parameter
Min
10
Max
Unit
ns
RI1 Low Time1
tL
RI1 High Time1
tH
10
ns
Delay to Set IRQ from Modem Input2
tSIM
40
ns
1. Not tested. Guaranteed by characterization.
2. Not tested. Guaranteed by design.
CTS, DSR, DCD
INTERRUPT
tSIM
tSIM
tSIM
(Read MSR)
(Read MSR)
RI
tL
tH
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70
Revision1.2
8.0 Device Characteristics (Continued)
8.4.10 Docking LPC Switch Timing
Symbol
tON
Parameter
Min
0
Max
14
Unit
ns
ns
-
Switch On after RE LCLK1
Switch Off after RE LCLK1
tOFF
0
28
4
tSW
Delay from Switch Enable Command to
Switch On2,3
4*tCYC
CLK2RSTVAL5
tCLK2RST
Delay from Switch Enable Command to
DLRESET de-assertion and DLFRAME,
DLAD connection2
-
tSU
DLDRQ setup time before RE LCLK
7
0
ns
ns
ps
tH
DLDRQ hold time after RE LCLK
Switch Propagation Delay1
tSWPD
300
1. Not tested. Guaranteed by characterization.
2. Not tested. Guaranteed by design.
3. The time is measured from the end of the corresponding LPC transaction.
4. tCYC is LCLK cycle time.
5. Defined by CLK2RSTVAL field of the DLCTL register; see Section 6.3.2 on page 45.
Switch On/Off Command
tSW
tCLK2RST
tSW
LCLK
tON
tON
tOFF
DLCLK, DCLKOUT,
DCLKRUN,
Connected
Held by Pull-ups
Held by Pull-ups
Driven
DSERIRQ
Connected
DLFRAME, DLAD
Held by Pull-down
DLRESET
Revision 1.2
71
www.national.com
Physical Dimensions
All dimensions are in millimeters.
48-Pin Low Profile Plastic Quad Flatpack (LQFP)
NS Package Number VBH48A
Order Number PC87382-VBH
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and whose
failure to perform, when properly used in accordance
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.
2. A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or
effectiveness.
National Semiconductor
Europe
National Semiconductor
Japan Ltd.
National Semiconductor
Corporation
Americas
Email:
new.feedback@nsc.com
National Semiconductor
Asia Pacific Customer
Response Group
Fax: +49 (0) 180-530 85 86
Tel:
81-3-5639-7560
Email: europe.support@nsc.com
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Fax: 81-3-5639-7507
Email: nsj.crc@jksmtp.nsc.com
Tel:
65-2544466
Fax: 65-2504466
Email: ap.support@nsc.com
www.national.com
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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