HT42B564-2 [HOLTEK]
UNIVERSAL SERIAL BUS CONTROLLER,;
| 型号： | HT42B564-2 |
| 厂家： | 
HOLTEK SEMICONDUCTOR INC |
| 描述： | UNIVERSAL SERIAL BUS CONTROLLER, LTE 外围集成电路 |
| 文件： | 总16页 (文件大小：768K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HT42B534-x
USB to UART Bridge IC
• Supports standard Windows® drivers for Virtual
Com Port (VCP): Windows XP (SP2), Vista,
Widows 7 & Windows 8 (only an INF file is
required), Windows 10
Features
• Operating Voltage (VDD): 3.3V~5.5V
• UART pin Voltage (VDDIO): 1.8V~VDD (Less than
VDD voltage)
• Supports Android 4.0 or later version and Mac OS X
• Integrated 256 bytes EEPROM for user memory
• Power down and wake-up functions to reduce
power consumption
• Package types: 8-pin SOP, 10-pin SOP/MSOP,
16-pin NSOP
• Fully integrated 12MHz oscillator with 0.25%
accuracy for all USB modes which requires no
external components
General Description
• USB interface
♦
USB 2.0 Full Speed compatible
The HT42B534-x device is a high performance USB
to UART bridge controller with fully integrated
USB and UART interface functions, designed for
applications that communicate with various types
of UART. The device includes a USB 2.0 full
speed compatible interface which is used for PC
communication. The device also includes a fully
integrated high speed oscillator which is used as clock
source for the USB and UART baud rate generator.
The baud rate generator can support up to 3Mbps of
baud rate for the UART interface.
♦
Implements USB protocol composite device:
– Communication Device Class (CDC) for
communications and configuration
– Human Interface Device (HID) for user
configure USB VID, PID and device
description strings
♦
Internal 1.5kΩ pull-high resistor on D+ pin
• Fully-duplex Universal Asynchronous Receiver
and Transmitter Interface – UART
♦
Supports Baud Rate up to 3Mbps
♦
Supports maximum 128 bytes transmit buffer
and 128 bytes receive buffer
♦
UART Data formats supported:
– Data bits: 8
– Stop bits: 1 and 2
– Parity: odd, even, no parity
♦
Supports RTS/CTS pins for auto flow control
♦
Supports RX pin resume signal to request a
remote wake-up
♦
Supports automatic resynchronization function
Rev. 1.10
1
March 26, 2019
HT42B534-x
USB Bridge IC Naming Rules
HT42B 5 3 4 - x
Product Family
HT42B = Holtek Bridge IC
Version
Bridge Series of Host
5 = USB
1 = First Version
USB Class type
Bridge Series of Device
2 = I2C
3 = SPI
4 = UART
3 = CDC Class
6 = HID Class
Revision History
Version
Date
Description
HT42B534-1
2016/12/09 First version
Add an automatic resynchronization function to achieve the reconnection for
successful data transmission after power-on.
HT42B534-2
2019/03/26
Selection Table
Virtual
COM
Interface
Data Rate
I/O
VDD
Part No.
Description
VDD
USB
HID FIFO/Buffer
Package
TX: 62 bytes
—
8SOP
10MSOP
HT42B532-x USB to I2C Bridge
HT42B533-x USB to SPI Bridge
√
√
Up to 400kHz
Up to 8MHz
√
√
RX: 62 bytes
TX: 128 bytes
—
10MSOP
16NSOP
RX: 128 bytes
3.3V~
5.5V
Full-Speed
8SOP
10SOP/MSOP
16NSOP
TX: 128 bytes
—
Up to 3Mbps
Baud
HT42B534-x USB to UART Bridge
√
√
√
RX: 128 bytes
USB (HID) to UART
TX: 32 bytes Up to 115.2kbps
RX: 32 bytes
—
HT42B564-x
Bridge
√
10SOP
Baud
Block Diagram
3.3V
VDD
Internal
Oscillator
Baud Rate
Generator
Device
Power
Regulator
GND
VDDIO
V33O
TX
128B
TX
Buffer
RX
D+
CTS
RTS
DSR
DTR
DSD
RI
USB
PHY
External
RS-232
TRansceiver
or
UART
Circuitry
D-
USB
Controller
UART
128B
RX
Buffer
VID
PID
Configure
LED
UDET
Rev. 1.10
2
March 26, 2019
HT42B534-x
Pin Assignment
10
9
1
2
3
4
5
VDD
V33O
GND
D+
GND
V33O
VDD
D-
1
2
3
4
8
7
6
5
D-
TX
8
RTS
RX
VDDIO
7
CTS
TX
D+
RX
6
VDDIO
HT42B534-x
10 MSOP-A
HT42B534-x
8 SOP-A
D+
D-
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VDD
RI
DCD
RTS
DSR
RX
V33O
GND
CTS
TX
10
9
1
2
3
4
5
D+
VDD
D-
GND
RX
8
V33O
UDET
LED
VDDIO
DTR
7
VDDIO
UDET
TX
LED
6
HT42B534-x
16 NSOP-A
HT42B534-x
10 SOP-A
Package Type
8SOP
Marking
HT42B534-x
HT42B534-x
B534-x
10SOP
10MSOP
16NSOP
HT42B534-x
Note: x stands for version number.
Pin Description
As the Pin Description table applies to the package type with the most pins, not all of the listed pinsmay be present
on package types with smaller numbers of pins.
Pin Name
Type
Description
D+
D-
I/O
USB D+ Line
USB D- Line
I/O
TX
RX
O
Asynchronous data output (UART Transmit)
Asynchronous data input (UART Receive)
Clear To Send control input, active low
Ready to Send control output, active low
Data Set Ready control input, active low
Data Terminal Ready control output, active low
Data Carrier Detect control input, active low
Ring Indicator control input, active low
TX/RX signal LED indication, active low
USB plug in/out detect pin, only for 10-pin SOP package
3.3V regulator output
I
CTS
RTS
DSR
DTR
DCD
RI
I
O
I
O
I
I
LED
O
UDET
V33O
VDDIO
VDD
GND
I
O
PWR
PWR
PWR
Positive power supply for TX/RX/CTS/RTS/DSR/DTR/DCD/RI pins
Positive power supply, USB bus power
Negative power supply, ground
Rev. 1.10
3
March 26, 2019
HT42B534-x
Absolute Maximum Ratings
IOH Total............................................................ -80mA
IOL Total............................................................. 80mA
Total Power Dissipation................................. 500mW
Supply Voltage........................VSS−0.3V to VSS+6.0V
Input Voltage.......................... VSS−0.3V to VDD+0.3V
Storage Temperature ...........................-50˚C to 125˚C
Operating Temperature .........................-40˚C to 85˚C
Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings”
may cause substantial damage to this device. Functional operation of this device at other conditions beyond
those listed in the specification is not implied and prolonged exposure to extreme conditions may affect
devices reliability.
D.C Characteristics
Ta=25°C
Test Conditions
Symbol
Parameter
Operating Voltage
Min.
Typ.
Max.
Unit
VDD
Conditions
VDD
VDDIO
IDD
—
—
—
3.3
1.8
—
—
—
11
5.5
VDD
16
V
V
UART Pins VDDIO Input Voltage
Operating Current
—
5V No load
mA
Suspend mode, No load, USB
on, other peripherals off
ISUS
Suspend Current (USB)
5V
—
360
450
μA
Standby mode, No load, USB
3V Plug-out, other peripherals off,
VDD power is from VDDIO
Standby Current (Non-USB)
for 10-pin SOP package only
ISTB
–
0.1
1.0
μA
VIL
VIH
Input Pins Input Low Voltage
Input Pins Input High Voltage
—
—
—
—
0
0.8VDDIO
4
—
—
8
0.2VDDIO
VDDIO
—
V
V
3V
5V
3V
5V
3V
5V
3V
5V
mA
mA
mA
mA
kΩ
kΩ
μA
μA
V
IOL
I/O Pins Sink Current
VOL = 0.1VDDIO
VOH = 0.9VDDIO
10
20
-4
—
-2
—
IOH
I/O Pins Source Current
I/O Pins Pull-high Resistance
-5
-10
60
30
—
—
3.3
—
—
—
20
100
50
RPH
10
—
±1
ILEAK
Input Leakage Current
VIN = VDD or VIN = VSS
—
±1
VV33O
RUDP1
3.3V Regulator Output Voltage
5V IV33O = 70mA
3.0
3.6
Pull-high Resistance between D+
and V33O
3.3V
—
-5%
1.5
+5%
kΩ
Rev. 1.10
4
March 26, 2019
HT42B534-x
A.C Characteristics
Ta=25°C
Min. Typ. Max. Unit
-0.25% 12 +0.25% MHz
Test Condition
Condition
High Speed Internal RC Oscillator 3.3V~5.5V USB mode
Symbol
Parameter
VDD
fHIRC
tSST
RX pin Wake-up from
power down mode
System Start-up Timer Period
System Reset Delay Time
—
—
16
25
—
—
tHIRC
ms
tRSTD
Power-on reset
50
100
Power-on Reset Characteristics
Ta=25°C
Test Conditions
Symbol
Parameter
Min.
Typ.
Max.
Unit
VDD
—
Conditions
VPOR
VDD Start Voltage to Ensure Power-on Reset
VDD Rising Rate to Ensure Power-on Reset
—
—
—
—
—
100
—
mV
RRPOR
—
0.035
V/ms
Minimum Time for VDD Stays at VPOR to Ensure
Power-on Reset
tPOR
—
—
1
—
—
ms
VDD
tPOR
RRPOR
VPOR
Time
Rev. 1.10
5
March 26, 2019
HT42B534-x
As the USB device has a remote wake-up function,
the USB device can wake up the USB host by sending
a remote wake-up pulse. Once the USB host receives
a remote wake-up signal from the USB device, the
host will send a resume signal to device.
USB Interface
The USB interface, being USB 2.0 full-speed
compatible, is a 4-wire serial bus that allows
communication between a host device and up to 127
max peripheral devices on the same bus. A token
based protocol method is used by the host device for
communication control. Other advantages of the USB
bus include live plugging and unplugging and dynamic
device configuration. As the complexity of USB
data protocol does not permit comprehensive USB
operation information to be provided in this datasheet,
the reader should therefore consult other external
information for a detailed USB understanding.
USB VID and PID Configuration
The device has configured the default Vendor ID
(VID:0x04D9), Product ID (PID:0xB534) and product
description strings of “USB to UART Bridge”. The
user can update the Vendor ID, Product ID, product
description strings and remote wake-up setting using
their application program.
This device has been configured to the default USB
configuration data as shown in the following table.
Power Planes
There are two power planes for the device and they
are the USB bus power input (VDD) and 3.3V
regulator output (V33O).
Parameter
USB Vendor ID (VID)
USB Product ID (PID)
Remote wake-up
Value (hex)
0x04D9
0xB534
For the USB SIE VDD will supply all circuits related
to USB SIE and be sourced from pin “VDD”. Once
the USB is removed from the USB and there is no
power in the USB BUS, the USB SIE circuit is no
longer operational.
Default disable
Holtek
Manufacturer Name
Product Description
Serial Number
USB to UART Bridge
0000
USB Interface Operation
UART Interface
To communicate with an external USB host, the
internal USB module has external pins known as
D+ and D- along with the 3.3V regulator output
V33O. A Serial Interface Engine (SIE) decodes the
incoming USB data stream and transfers it to the
correct endpoint buffer memory known as the FIFO.
The USB module has 4 endpoints, EP0 ~ EP3. The
endpoint 0 supports the Control transfer while the
endpoint 1 ~ endpoint 3 support the Interrupt or
Bulk transfer. The HT42B534-x Bridge IC supports
the USB Communication Device Class (CDC) for
communications and configuration.
The HT42B534-x contains an integrated full-duplex
asynchronous serial communications UART interface
that enables communication with external devices
that contain a serial interface. The UART function
has many features and can transmit and receive data
serially by transferring a frame of data with eight data
bits per transmission as well as being able to detect
errors when the data is overwritten or incorrectly
framed. The UART function possesses its own
internal interrupt which can be used to indicate when
a reception occurs or when a transmission terminates.
Endpoint
Transfer Type
Control
The integrated UART function contains the following
features:
0
1
2
3
Interrupt
Bulk Out
Bulk In
• Full-duplex, asynchronous communication
• 8 bits character length
• Even, odd or no parity options
• One or two stop bits
USB Endpoint Transfer Type
If there is no signal on the USB bus for over 3ms, the
USB device will enter the suspend mode. The device
enters the suspend state to meet the requirements of
the USB suspend current specification. When the
resume signal is asserted by the USB host, the device
will be woken up and leave the suspend mode.
• Baud rate generator with prescaler
• 128-byte Deep FIFO Transmit Data Buffer
• 128-byte Deep FIFO Receive Data Buffer
• RX pin wake-up function
• UART pins power supply by VDDIO pin
Rev. 1.10
6
March 26, 2019
HT42B534-x
UART External Pin
UART Power Down and Wake-up
To communicate with an external serial interface,
the internal UART has two external pins known as
TX and RX. The TX and RX pins are the UART
transmitter and receiver pins respectively.
If the USB host sends a suspend signal to the
HT42B534-x USB device, it will enter the suspend
mode. It is recommended to ensure that the UART
data transmission or reception has been finished
before the device enters the suspend mode.
UART Data Transfer Scheme
The UART function contains a receiver RX pin wake-
up function. A falling edge on the RX pin will wake
up the device from the suspend mode.
The data will be transferred to the Transmit Shift
Register from where it will be shifted out, LSB first,
onto the TX pin at a rate controlled by the Baud
Rate Generator. Data to be received by the UART
is accepted on the external RX pin, from where it is
shifted in, LSB first, to the Receiver Shift Register
at a rate controlled by the Baud Rate Generator.
The UART interface provides a 128 byte deep FIFO
transmit data buffer and a 128 byte deep FIFO receive
data buffer for applications.
Application Program Demo
Holtek USB Bridge Program
Holtek provides an application program to setup
the HT42B534-x Bridge IC for USB to UART data
communication. The application program carries the
name “Holtek USB Bridge Program”. The application
program function contains two blocks, the first block
is for the customer vendor ID, product ID and product
information upgrate, the second block is for the USB
to UART application settings. The USB to UART
setting block can be used to configure the baud rate,
data, stop bits, parity, flow control and data transmit/
receive demo.
For data transfer, the UART function utilises a non-
return-to-zero, more commonly known as NRZ,
format. This is composed of one start bit, eight data
bits and one or two stop bits. Parity is supported by
the UART hardware and can be setup to be even, odd
or no parity. For the most common data format, 8 data
bits along with no parity and one stop bit, denoted as 8,
N, 1, is used as the default setting, which is the setting
at power-on.
The main figure for the program update is as follows:
The following diagram shows the transmit and receive
waveforms for an 8-bit data format.
Next
Start
Bit
Parity Bit
Start
Bit
Stop
Bit
Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7
8-bit Data Format
Baud Rate Generator
To setup the speed of the serial data communication,
the UART function contains its own dedicated baud
rate generator. The default UART baud rate is 9600bps
and it can be controlled by the application program.
The baud rate and miss rate table:
Baud Rate
2400
Real Rate
Miss Rate (%)
0.16
2403.846154
4807.692308
9603.841537
19207.68307
38461.53846
57692.30769
115384.6154
230769.2308
457142.8571
1714285.714
2285714.286
3428571.429
4800
0.16
9600
0.04
19200
0.04
38400
0.16
57600
0.16
115200
230400
460800
1700000
2300000
3400000
0.16
0.16
0.79
0.84
0.62
0.84
Rev. 1.10
7
March 26, 2019
HT42B534-x
• Step5: Import user memory (user optional).
Program Update Block
• Step6: Save or open user memory data (user
optional).
On the program update block page, first open the
Holtek VID/PID Bridge IC. If the USB has been
plugged into the host PC, a new window will pop
up showing USB open success. The user can update
the customer VID, PID, manufacturer name, product
description, serial number and 256 bytes of user
memory as well as set the UART bridge device
hardware flow control and remote wake-up functions.
A user memory area, where no special data has been
stored, can be used by the user for self-definition.
• Step7: Download or upload VID/PID/Product
strings and the user memory data.
USB to UART Block
The USB to UART setting block is used to configure
the baud rate, data, stop bits, parity, flow control and
data transmit/receive demo. This page can also control
the output RTS and DTR toggle pins, CTS, RI, DSR
and DCD pins input status.
The following table shows the configuration
descriptor length.
The figure for the USB to UART is as follows:
Parameter
Length
USB Vendor ID(VID) 1 Word (hex)
USB Product ID(PID) 1 Word (hex)
Manufacturer Name Max. support 16 characters
Product Description Max. support 32 characters
Serial Number
Max. support 4 words
The main figure of the program update block is as
follows:
USB to UART Bridge operating steps:
• Step1: Select USB to UART page.
• Step2: Check that device is HT42B534-x.
• Setp3: Select COM port number.
• Step4: Select baud rate.
• Step5: Select one or two stop bits.
• Step6: Select parity.
• Step7: Select flow control function.
• Step8: Open the selections.
Configuration operating steps:
• Step9: Input the data to be transmitted.
• Step10: Send data.
• Step1: Open the Holtek Bridge VID/PID device.
• Step2: Change custom device or go to USB to
UART page.
• Step11: Receive data.
• Setp3: Input VID/PID and product strings (If the
user needs to change custom device).
• Step12: Toggle RTS/ DTR pins.
• Step13: Input CTS/RI/DSR/DCD pins status.
• Step4: Hardware flow control and remote wakeup
setting.
Rev. 1.10
8
March 26, 2019
HT42B534-x
Application Circuits
Rev. 1.10
9
March 26, 2019
HT42B534-x
Dual Power Product Application Circuits
VCC
VDD
1N5817
3.3V
5V or 3.3V
Battery
3.3V
VDDIO
VDD
0.1µF
0.1µF
10µF
0.1µF
GND
VDD
USB
Connector
MCU
Application
Circuit
UDET
VBUS
D-
33Ω
330Ω
D-
LED
D+
VSS
D+
33Ω
47pF
LED
47pF
V33O
TX
RX
RX
TX
UART
1µF
HT42B534-x
10SOP
Note: 1. Design note: 10-SOP package only for two power application, the VCC power must be below VDD
power. (The VCC power can be from the Li-battery).
2. The UDET pin can used for detect the USB plug-in for transfer data, detect the USB plug-out for entry
energy saving mode.
Rev. 1.10
10
March 26, 2019
HT42B534-x
Package Information
Note that the package information provided here is for consultation purposes only. As this information may be
updated at regular intervals users are reminded to consult the Holtek website for the latest version of the Package/
Carton Information.
Additional supplementary information with regard to packaging is listed below. Click on the relevant section to be
transferred to the relevant website page.
• Package Information (include Outline Dimensions, Product Tape and Reel Specifications)
• The Operation Instruction of Packing Materials
• Carton information
Rev. 1.10
11
March 26, 2019
HT42B534-x
8-pin SOP (150mil) Outline Dimensions
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+
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-
.
Dimensions in inch
Symbol
Min.
—
Nom.
Max.
—
A
B
C
C′
D
E
F
0.236 BSC
—
0.154 BSC
—
0.012
—
—
0.020
—
0.193 BSC
—
—
0.069
—
—
0.050 BSC
0.004
0.016
0.004
0°
—
—
—
—
0.010
0.050
0.010
8°
G
H
α
Dimensions in mm
Symbol
Min.
—
Nom.
6.00 BSC
3.90 BSC
—
Max.
—
A
B
C
C′
D
E
F
—
—
0.31
—
0.51
—
4.90 BSC
—
—
1.75
—
—
1.27 BSC
—
0.10
0.40
0.10
0°
0.25
1.27
0.25
8°
G
H
α
—
—
—
Rev. 1.10
12
March 26, 2019
HT42B534-x
10-pin SOP (150mil) Outline Dimensions
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ꢂ
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+
+
ꢀ
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=
-
.
Dimensions in inch
Symbol
Min.
—
Nom.
Max.
—
A
B
C
C′
D
E
F
0.236 BSC
—
0.154 BSC
—
0.012
—
—
0.018
—
0.193 BSC
—
—
0.069
—
—
0.039 BSC
0.004
0.016
0.004
0°
—
—
—
—
0.010
0.050
0.010
8°
G
H
α
Dimensions in mm
Symbol
Min.
—F
—
Nom.
6.00 BSC
3.90 BSC
—
Max.
—
A
B
C
C′
D
E
F
—
0.30
—
0.45
—
4.90 BSC
—
—
1.75
—
—
1.00 BSC
—
0.10
0.40
0.10
0°
0.25
1.27
0.25
8°
G
H
α
—
—
—
Rev. 1.10
13
March 26, 2019
HT42B534-x
10-pin MSOP Outline Dimensions
1
0
6
E
1
1
5
E
D
L
A
A
2
C
G
e
B
A
1
L
1
R
0
1
.
0
4
C
O
N
R
R
E
)
S
Dimensions in inch
Symbol
Min.
—
Nom.
—
Max.
0.043
0.006
0.037
0.013
0.009
—
A
A1
A2
B
0.000
0.030
0.007
0.003
—
—
0.033
—
C
—
D
0.118 BSC
0.193 BSC
0.118 BSC
0.020 BSC
0.024
E
—
—
E1
e
—
—
—
—
L
0.016
—
0.031
—
L1
y
0.037 BSC
0.004
—
—
θ
0°
—
8°
Dimensions in mm
Symbol
Min.
—
Nom.
—
Max.
1.10
0.15
0.95
0.33
0.23
—
A
A1
A2
B
0.00
0.75
0.17
0.08
—
—
0.85
—
C
—
D
3.00 BSC
4.90 BSC
3.00 BSC
0.50 BSC
0.60
E
—
—
E1
e
—
—
—
—
L
0.40
—
0.80
—
L1
y
0.95 BSC
0.10
—
—
θ
0°
—
8°
Rev. 1.10
14
March 26, 2019
HT42B534-x
16-pin NSOP (150mil) Outline Dimensions
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/
0
,
=
.
-
Dimensions in inch
Symbol
Min.
—
Nom.
Max.
—
A
B
C
C’
D
E
F
0.236 BSC
—
0.154 BSC
—
0.012
—
—
0.020
—
0.390 BSC
—
—
0.069
—
—
0.050 BSC
0.004
0.016
0.004
0°
—
—
—
—
0.010
0.050
0.010
8°
G
H
α
Dimensions in mm
Symbol
Min.
—
Nom.
6.0 BSC
3.9 BSC
—
Max.
—
A
B
C
C’
D
E
F
—
—
0.31
—
0.51
—
9.9 BSC
—
—
1.75
—
—
1.27 BSC
—
0.10
0.40
0.10
0°
0.25
1.27
0.25
8°
G
H
α
—
—
—
Rev. 1.10
15
March 26, 2019
HT42B534-x
Copyright© 2019 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time
of publication. However, Holtek assumes no responsibility arising from the use of
the specifications described. The applications mentioned herein are used solely
for the purpose of illustration and Holtek makes no warranty or representation that
such applications will be suitable without further modification, nor recommends
the use of its products for application that may present a risk to human life due to
malfunction or otherwise. Holtek's products are not authorized for use as critical
components in life support devices or systems. Holtek reserves the right to alter
its products without prior notification. For the most up-to-date information, please
visit our web site at http://www.holtek.com.
Rev. 1.10
16
March 26, 2019
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