HT42B564-x [HOLTEK]
USB to UART Bridge IC;
| 型号： | HT42B564-x |
| 厂家： | 
HOLTEK SEMICONDUCTOR INC |
| 描述： | USB to UART Bridge IC |
| 文件： | 总16页 (文件大小：2280K) |
| 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
• SupportsꢀstandardꢀWindows®ꢀdriversꢀforꢀVirtual
ComꢀPortꢀ(VCP):ꢀWindowsꢀXPꢀ(SP2),ꢀVista,
Widowsꢀ7ꢀ&ꢀWindowsꢀ8ꢀ(onlyꢀanꢀINFꢀfileꢀis
required),ꢀWindowsꢀ10
Features
• OperatingꢀVoltageꢀ(VDD):ꢀ3.3V~5.5V
• UARTꢀpinꢀVoltageꢀ(VDDIO):ꢀ1.8V~VDDꢀ(Lessꢀthan
VDDꢀvoltage)
• SupportsꢀAndroidꢀ4.0ꢀorꢀlaterꢀversionꢀandꢀMacꢀOSꢀX
• Powerꢀdownꢀandꢀwake-upꢀfunctionsꢀtoꢀreduce
powerꢀconsumption
• Integratedꢀ256ꢀbytesꢀtrue EEPROMꢀforꢀuserꢀmemory
• Packageꢀtypes:ꢀ8-pinꢀSOP,ꢀ10-pinꢀSOP/MSOP,
16-pinꢀNSOP
• Fullyꢀintegratedꢀ12MHzꢀoscillatorꢀwithꢀ0.25%
accuracyꢀforꢀallꢀUSBꢀmodesꢀwhichꢀrequiresꢀno
externalꢀcomponents
General Description
• USBꢀinterface
ꢀ
♦
USBꢀ2.0ꢀFullꢀSpeedꢀcompatible
TheꢀHT42B534-xꢀdeviceꢀisꢀaꢀhighꢀperformanceꢀUSBꢀ
toꢀUARTꢀbridgeꢀcontrollerꢀwithꢀfullyꢀintegratedꢀ
USBꢀandꢀUARTꢀinterfaceꢀfunctions,ꢀdesignedꢀforꢀ
applicationsꢀthatꢀcommunicateꢀwithꢀvariousꢀtypesꢀ
ofꢀ UART.ꢀTheꢀ deviceꢀ includesꢀ aꢀ USBꢀ 2.0ꢀ fullꢀ
speedꢀcompatibleꢀinterfaceꢀwhichꢀisꢀusedꢀforꢀPCꢀ
communication.ꢀTheꢀdeviceꢀalsoꢀincludesꢀaꢀfullyꢀ
integratedꢀhighꢀspeedꢀoscillatorꢀwhichꢀisꢀusedꢀasꢀclockꢀ
sourceꢀforꢀtheꢀUSBꢀandꢀUARTꢀbaudꢀrateꢀgenerator.ꢀ
Theꢀbaudꢀrateꢀgeneratorꢀcanꢀsupportꢀupꢀtoꢀ3Mbpsꢀofꢀ
baudꢀrateꢀforꢀtheꢀUARTꢀinterface.
ꢀ
♦
ImplementsꢀUSBꢀprotocolꢀcompositeꢀdevice:
–ꢀ CommunicationꢀDeviceꢀClassꢀ(CDC)ꢀforꢀ
communicationsꢀandꢀconfiguration
–ꢀ HumanꢀInterfaceꢀDeviceꢀ(HID)ꢀforꢀuserꢀ
configureꢀUSBꢀVID,ꢀPIDꢀandꢀdeviceꢀ
descriptionꢀstrings
ꢀ
♦
Internalꢀ1.5kΩꢀpull-highꢀresistorꢀonꢀD+ꢀpin
• Fully-duplexꢀUniversalꢀAsynchronousꢀReceiver
andꢀTransmitterꢀInterfaceꢀ–ꢀUART
ꢀ
♦
SupportsꢀBaudꢀRateꢀupꢀtoꢀ3Mbps
ꢀ
♦
Supportsꢀmaximumꢀ128ꢀbytesꢀtransmitꢀbuffer
andꢀ128ꢀbytesꢀreceiveꢀbuffer
ꢀ
♦
UARTꢀDataꢀformatsꢀsupported:
–ꢀ Dataꢀbits:ꢀ8
–ꢀ Stopꢀbits:ꢀ1ꢀandꢀ2
–ꢀ Parity:ꢀodd,ꢀeven,ꢀnoꢀparity
ꢀ
ꢀ
♦
SupportsꢀRTS/CTSꢀpinsꢀforꢀautoꢀflowꢀcontrol
♦
SupportsꢀRXꢀpinꢀresumeꢀsignalꢀtoꢀrequestꢀaꢀ
remoteꢀwake-up
ꢀ
♦
SupportsꢀVDDIOꢀpinꢀforꢀUARTꢀpinsꢀpowerꢀ
supply
Rev. 1.00
1
December 09, 2016
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
Selection Table
Virtual
COM
Interface
Data Rate
I/O
Part No.
Description
VDD
USB
HID FIFO/Buffer
Package
VDD
TX: 62 bytes
RX: 62 bytes
8SOP
10MSOP
HT42B532-x USB to I2C Bridge
HT42B533-x USB to SPI Bridge
√
√
Up to 400kHz
√
—
—
TX: 128 bytes
RX: 128 bytes
10MSOP
16NSOP
Up to 8MHz
√
3.3V~
5.5V
Full-Speed
8SOP
10SOP/MSOP
16NSOP
TX: 128 bytes
RX: 128 bytes
Up to 3Mbps
Baud
—
HT42B534-x USB to UART Bridge
√
√
√
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. 1.00
2
December 09, 2016
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=1ꢀforꢀversionꢀnumber.
Pin Description
AsꢀtheꢀPinꢀDescriptionꢀtableꢀappliesꢀtoꢀtheꢀpackageꢀtypeꢀwithꢀtheꢀmostꢀpins,ꢀnotꢀallꢀofꢀtheꢀlistedꢀpinsꢀmayꢀbeꢀpresentꢀ
onꢀpackageꢀtypesꢀwithꢀsmallerꢀnumbersꢀofꢀpins.
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. 1.00
3
December 09, 2016
IOHꢀTotal
............................................................ -80mA
HT42B534-x
Absolute Maximum Ratings
SupplyꢀVoltageꢀ........................VSS−0.3VꢀtoꢀVSS+6.0V
IOLꢀTotalꢀ............................................................. 80mA
TotalꢀPowerꢀDissipation................................. 500mW
InputꢀVoltageꢀ.......................... VSS−0.3VꢀtoꢀVDD+0.3V
StorageꢀTemperatureꢀ...........................-50˚Cꢀtoꢀ125˚C
OperatingꢀTemperatureꢀ.........................-40˚Cꢀtoꢀ85˚C
Note:ꢀTheseꢀareꢀstressꢀratingsꢀonly.ꢀStressesꢀexceedingꢀtheꢀrangeꢀspecifiedꢀunderꢀ“AbsoluteꢀMaximumꢀRatings”ꢀ
mayꢀcauseꢀsubstantialꢀdamageꢀtoꢀthisꢀdevice.ꢀFunctionalꢀoperationꢀofꢀthisꢀdeviceꢀatꢀotherꢀconditionsꢀbeyondꢀ
thoseꢀlistedꢀinꢀtheꢀspecificationꢀisꢀnotꢀimpliedꢀandꢀprolongedꢀexposureꢀtoꢀextremeꢀconditionsꢀmayꢀaffectꢀ
devicesꢀreliability.
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. 1.00
4
December 09, 2016
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. 1.00
5
December 09, 2016
HT42B534-x
AsꢀtheꢀUSBꢀdeviceꢀhasꢀaꢀremoteꢀwake-upꢀfunction,ꢀ
theꢀUSBꢀdeviceꢀcanꢀwakeꢀupꢀtheꢀUSBꢀhostꢀbyꢀsendingꢀ
aꢀremoteꢀwake-upꢀpulse.ꢀOnceꢀtheꢀUSBꢀhostꢀreceivesꢀ
aꢀremoteꢀwake-upꢀsignalꢀfromꢀtheꢀUSBꢀdevice,ꢀtheꢀ
hostꢀwillꢀsendꢀaꢀresumeꢀsignalꢀtoꢀdevice.
USB Interface
Theꢀ USBꢀ interface,ꢀ beingꢀ USBꢀ 2.0ꢀ full-speedꢀ
compatible,ꢀ isꢀ aꢀ 4-wireꢀ serialꢀ busꢀ thatꢀ allowsꢀ
communicationꢀbetweenꢀaꢀhostꢀdeviceꢀandꢀupꢀtoꢀ127ꢀ
maxꢀperipheralꢀdevicesꢀonꢀtheꢀsameꢀbus.ꢀAꢀtokenꢀ
basedꢀprotocolꢀmethodꢀisꢀusedꢀbyꢀtheꢀhostꢀdeviceꢀforꢀ
communicationꢀcontrol.ꢀOtherꢀadvantagesꢀofꢀtheꢀUSBꢀ
busꢀincludeꢀliveꢀpluggingꢀandꢀunpluggingꢀandꢀdynamicꢀ
deviceꢀconfiguration.ꢀAsꢀtheꢀcomplexityꢀofꢀUSBꢀ
dataꢀprotocolꢀdoesꢀnotꢀpermitꢀcomprehensiveꢀUSBꢀ
operationꢀinformationꢀtoꢀbeꢀprovidedꢀinꢀthisꢀdatasheet,ꢀ
theꢀreaderꢀshouldꢀthereforeꢀconsultꢀotherꢀexternalꢀ
informationꢀforꢀaꢀdetailedꢀUSBꢀunderstanding.
USB VID and PID Configuration
TheꢀdeviceꢀhasꢀconfiguredꢀtheꢀdefaultꢀVendorꢀIDꢀ
(VID:0x04D9),ꢀProductꢀIDꢀ(PID:0xB534)ꢀandꢀproductꢀ
descriptionꢀstringsꢀofꢀ“USBꢀtoꢀUARTꢀBridge”.ꢀTheꢀ
userꢀcanꢀupdateꢀtheꢀVendorꢀID,ꢀProductꢀID,ꢀproductꢀ
descriptionꢀstringsꢀandꢀremoteꢀwake-upꢀsettingꢀusingꢀ
theirꢀapplicationꢀprogram.ꢀ
ThisꢀdeviceꢀhasꢀbeenꢀconfiguredꢀtoꢀtheꢀdefaultꢀUSBꢀ
configurationꢀdataꢀasꢀshownꢀinꢀtheꢀfollowingꢀtable.
Power Planes
Thereꢀareꢀtwoꢀpowerꢀplanesꢀforꢀtheꢀdeviceꢀandꢀtheyꢀ
areꢀtheꢀUSBꢀbusꢀpowerꢀinputꢀ(VDD)ꢀandꢀ3.3Vꢀ
regulatorꢀoutputꢀ(V33O).
Parameter
USB Vendor ID (VID)
USB Product ID (PID)
Remote wake-up
Value (hex)
0x04D9
0xB534
ForꢀtheꢀUSBꢀSIEꢀVDDꢀwillꢀsupplyꢀallꢀcircuitsꢀrelatedꢀ
toꢀUSBꢀSIEꢀandꢀbeꢀsourcedꢀfromꢀpinꢀ“VDD”.ꢀOnceꢀ
theꢀUSBꢀisꢀremovedꢀfromꢀtheꢀUSBꢀandꢀthereꢀisꢀnoꢀ
powerꢀinꢀtheꢀUSBꢀBUS,ꢀtheꢀUSBꢀSIEꢀcircuitꢀisꢀnoꢀ
longerꢀoperational.
Default disable
Holtek
Manufacturer Name
Product Description
Serial Number
USB to UART Bridge
0000
USB Interface Operation
UART Interface
ToꢀcommunicateꢀwithꢀanꢀexternalꢀUSBꢀhost,ꢀtheꢀ
internalꢀUSBꢀmoduleꢀhasꢀexternalꢀpinsꢀknownꢀasꢀ
D+ꢀandꢀD-ꢀalongꢀwithꢀtheꢀ3.3Vꢀregulatorꢀoutputꢀ
V33O.ꢀAꢀSerialꢀInterfaceꢀEngineꢀ(SIE)ꢀdecodesꢀtheꢀ
incomingꢀUSBꢀdataꢀstreamꢀandꢀtransfersꢀitꢀtoꢀtheꢀ
correctꢀendpointꢀbufferꢀmemoryꢀknownꢀasꢀtheꢀFIFO.ꢀ
TheꢀUSBꢀmoduleꢀhasꢀ4ꢀendpoints,ꢀEP0ꢀ~ꢀEP3.ꢀTheꢀ
endpointꢀ0ꢀsupportsꢀtheꢀControlꢀtransferꢀwhileꢀtheꢀ
endpointꢀ1ꢀ~ꢀendpointꢀ3ꢀsupportꢀtheꢀInterruptꢀorꢀ
Bulkꢀtransfer.ꢀTheꢀHT42B534-xꢀBridgeꢀICꢀsupportsꢀ
theꢀUSBꢀCommunicationꢀDeviceꢀClassꢀ(CDC)ꢀforꢀ
communicationsꢀandꢀconfiguration.
TheꢀHT42B534-xꢀcontainsꢀanꢀintegratedꢀfull-duplexꢀ
asynchronousꢀserialꢀcommunicationsꢀUARTꢀinterfaceꢀ
thatꢀenablesꢀcommunicationꢀwithꢀexternalꢀdevicesꢀ
thatꢀcontainꢀaꢀserialꢀinterface.ꢀTheꢀUARTꢀfunctionꢀ
hasꢀmanyꢀfeaturesꢀandꢀcanꢀtransmitꢀandꢀreceiveꢀdataꢀ
seriallyꢀbyꢀtransferringꢀaꢀframeꢀofꢀdataꢀwithꢀeightꢀdataꢀ
bitsꢀperꢀtransmissionꢀasꢀwellꢀasꢀbeingꢀableꢀtoꢀdetectꢀ
errorsꢀwhenꢀtheꢀdataꢀisꢀoverwrittenꢀorꢀincorrectlyꢀ
framed.ꢀTheꢀUARTꢀfunctionꢀpossessesꢀitsꢀownꢀ
internalꢀinterruptꢀwhichꢀcanꢀbeꢀusedꢀtoꢀindicateꢀwhenꢀ
aꢀreceptionꢀoccursꢀorꢀwhenꢀaꢀtransmissionꢀterminates.
Endpoint
Transfer Type
Control
TheꢀintegratedꢀUARTꢀfunctionꢀcontainsꢀtheꢀfollowingꢀ
features:
0
1
2
3
Interrupt
Bulk Out
Bulk In
•ꢀ Full-duplex,ꢀasynchronousꢀcommunication
•ꢀ 8ꢀbitsꢀcharacterꢀlength
•ꢀ Even,ꢀoddꢀorꢀnoꢀparityꢀoptions
•ꢀ Oneꢀorꢀtwoꢀstopꢀbits
USB Endpoint Transfer Type
IfꢀthereꢀisꢀnoꢀsignalꢀonꢀtheꢀUSBꢀbusꢀforꢀoverꢀ3ms,ꢀtheꢀ
USBꢀdeviceꢀwillꢀenterꢀtheꢀsuspendꢀmode.ꢀTheꢀdeviceꢀ
entersꢀtheꢀsuspendꢀstateꢀtoꢀmeetꢀtheꢀrequirementsꢀofꢀ
theꢀUSBꢀsuspendꢀcurrentꢀspecification.ꢀWhenꢀtheꢀ
resumeꢀsignalꢀisꢀassertedꢀbyꢀtheꢀUSBꢀhost,ꢀtheꢀdeviceꢀ
willꢀbeꢀwokenꢀupꢀandꢀleaveꢀtheꢀsuspendꢀmode.
•ꢀ Baudꢀrateꢀgeneratorꢀwithꢀprescaler
•ꢀ 128-byteꢀDeepꢀFIFOꢀTransmitꢀDataꢀBuffer
•ꢀ 128-byteꢀDeepꢀFIFOꢀReceiveꢀDataꢀBuffer
•ꢀ RXꢀpinꢀwake-upꢀfunction
•ꢀ UARTꢀpinsꢀpowerꢀsupplyꢀbyꢀVDDIOꢀpin
Rev. 1.00
6
December 09, 2016
HT42B534-x
UART External Pin
UART Power Down and Wake-up
Toꢀcommunicateꢀwithꢀanꢀexternalꢀserialꢀinterface,ꢀ
theꢀinternalꢀUARTꢀhasꢀtwoꢀexternalꢀpinsꢀknownꢀasꢀ
TXꢀandꢀRX.ꢀTheꢀTXꢀandꢀRXꢀpinsꢀareꢀtheꢀUARTꢀ
transmitterꢀandꢀreceiverꢀpinsꢀrespectively.
IfꢀtheꢀUSBꢀ hostꢀsendsꢀ aꢀsuspendꢀ signalꢀtoꢀtheꢀ
HT42B534-xꢀUSBꢀdevice,ꢀitꢀwillꢀenterꢀtheꢀsuspendꢀ
mode.ꢀItꢀisꢀrecommendedꢀtoꢀensureꢀthatꢀtheꢀUARTꢀ
dataꢀtransmissionꢀorꢀreceptionꢀhasꢀbeenꢀfinishedꢀ
beforeꢀtheꢀdeviceꢀentersꢀtheꢀsuspendꢀmode.
UART Data Transfer Scheme
TheꢀUARTꢀfunctionꢀcontainsꢀaꢀreceiverꢀRXꢀpinꢀwake-
upꢀfunction.ꢀAꢀfallingꢀedgeꢀonꢀtheꢀRXꢀpinꢀwillꢀwakeꢀ
upꢀtheꢀdeviceꢀfromꢀtheꢀsuspendꢀmode.
TheꢀdataꢀwillꢀbeꢀtransferredꢀtoꢀtheꢀTransmitꢀShiftꢀ
Registerꢀfromꢀwhereꢀitꢀwillꢀbeꢀshiftedꢀout,ꢀLSBꢀfirst,ꢀ
ontoꢀtheꢀTXꢀpinꢀatꢀaꢀrateꢀcontrolledꢀbyꢀtheꢀBaudꢀ
RateꢀGenerator.ꢀDataꢀtoꢀbeꢀreceivedꢀbyꢀtheꢀUARTꢀ
isꢀacceptedꢀonꢀtheꢀexternalꢀRXꢀpin,ꢀfromꢀwhereꢀitꢀisꢀ
shiftedꢀin,ꢀLSBꢀfirst,ꢀtoꢀtheꢀReceiverꢀShiftꢀRegisterꢀ
atꢀaꢀrateꢀcontrolledꢀbyꢀtheꢀBaudꢀRateꢀGenerator.ꢀ
TheꢀUARTꢀinterfaceꢀprovidesꢀaꢀ128ꢀbyteꢀdeepꢀFIFOꢀ
transmitꢀdataꢀbufferꢀandꢀaꢀ128ꢀbyteꢀdeepꢀFIFOꢀreceiveꢀ
dataꢀbufferꢀforꢀapplications.ꢀ
Application Program Demo
Holtek USB Bridge Program
Holtekꢀprovidesꢀanꢀapplicationꢀprogramꢀtoꢀsetupꢀ
theꢀHT42B534-xꢀBridgeꢀICꢀforꢀUSBꢀtoꢀUARTꢀdataꢀ
communication.ꢀTheꢀapplicationꢀprogramꢀcarriesꢀtheꢀ
nameꢀ“HoltekꢀUSBꢀBridgeꢀProgram”.ꢀTheꢀapplicationꢀ
programꢀfunctionꢀcontainsꢀtwoꢀblocks,ꢀtheꢀfirstꢀblockꢀ
isꢀforꢀtheꢀcustomerꢀvendorꢀID,ꢀproductꢀIDꢀandꢀproductꢀ
informationꢀupgrate,ꢀtheꢀsecondꢀblockꢀisꢀforꢀtheꢀUSBꢀ
toꢀUARTꢀapplicationꢀsettings.ꢀTheꢀUSBꢀtoꢀUARTꢀ
settingꢀblockꢀcanꢀbeꢀusedꢀtoꢀconfigureꢀtheꢀbaudꢀrate,ꢀ
data,ꢀstopꢀbits,ꢀparity,ꢀflowꢀcontrolꢀandꢀdataꢀtransmit/
receiveꢀdemo.ꢀ
Forꢀdataꢀtransfer,ꢀtheꢀUARTꢀfunctionꢀutilisesꢀaꢀnon-
return-to-zero,ꢀmoreꢀcommonlyꢀknownꢀasꢀNRZ,ꢀ
format.ꢀThisꢀisꢀcomposedꢀofꢀoneꢀstartꢀbit,ꢀeightꢀdataꢀ
bitsꢀandꢀoneꢀorꢀtwoꢀstopꢀbits.ꢀParityꢀisꢀsupportedꢀbyꢀ
theꢀUARTꢀhardwareꢀandꢀcanꢀbeꢀsetupꢀtoꢀbeꢀeven,ꢀoddꢀ
orꢀnoꢀparity.ꢀForꢀtheꢀmostꢀcommonꢀdataꢀformat,ꢀ8ꢀdataꢀ
bitsꢀalongꢀwithꢀnoꢀparityꢀandꢀoneꢀstopꢀbit,ꢀdenotedꢀasꢀ8,ꢀ
N,ꢀ1,ꢀisꢀusedꢀasꢀtheꢀdefaultꢀsetting,ꢀwhichꢀisꢀtheꢀsettingꢀ
atꢀpower-on.
Theꢀmainꢀfigureꢀforꢀtheꢀprogramꢀupdateꢀisꢀasꢀfollows:
Theꢀfollowingꢀdiagramꢀshowsꢀtheꢀtransmitꢀandꢀreceiveꢀ
waveformsꢀforꢀanꢀ8-bitꢀdataꢀformat.
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
Toꢀsetupꢀtheꢀspeedꢀofꢀtheꢀserialꢀdataꢀcommunication,ꢀ
theꢀUARTꢀfunctionꢀcontainsꢀitsꢀownꢀdedicatedꢀbaudꢀ
rateꢀgenerator.ꢀTheꢀdefaultꢀUARTꢀbaudꢀrateꢀisꢀ9600bpsꢀ
andꢀitꢀcanꢀbeꢀcontrolledꢀbyꢀtheꢀapplicationꢀprogram.
Theꢀbaudꢀrateꢀandꢀmissꢀrateꢀtable:
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
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December 09, 2016
HT42B534-x
•ꢀ Step5:ꢀImportꢀuserꢀmemoryꢀ(userꢀoptional).
Program Update Block
•ꢀ Step6:ꢀSaveꢀorꢀopenꢀuserꢀmemoryꢀdataꢀ(userꢀ
optional).
Onꢀtheꢀprogramꢀupdateꢀblockꢀpage,ꢀfirstꢀopenꢀtheꢀ
HoltekꢀVID/PIDꢀBridgeꢀIC.ꢀIfꢀtheꢀUSBꢀhasꢀbeenꢀ
pluggedꢀintoꢀtheꢀhostꢀPC,ꢀaꢀnewꢀwindowꢀwillꢀpopꢀ
upꢀshowingꢀUSBꢀopenꢀsuccess.ꢀTheꢀuserꢀcanꢀupdateꢀ
theꢀcustomerꢀVID,ꢀPID,ꢀmanufacturerꢀname,ꢀproductꢀ
description,ꢀserialꢀnumberꢀandꢀ256ꢀbytesꢀofꢀuserꢀ
memoryꢀasꢀwellꢀasꢀsetꢀtheꢀUARTꢀbridgeꢀdeviceꢀ
hardwareꢀflowꢀcontrolꢀandꢀremoteꢀwake-upꢀfunctions.ꢀ
Aꢀuserꢀmemoryꢀarea,ꢀwhereꢀnoꢀspecialꢀdataꢀhasꢀbeenꢀ
stored,ꢀcanꢀbeꢀusedꢀbyꢀtheꢀuserꢀforꢀself-definition.
•ꢀ Step7:ꢀDownloadꢀorꢀuploadꢀVID/PID/Productꢀ
stringsꢀandꢀtheꢀuserꢀmemoryꢀdata.
USB to UART Block
TheꢀUSBꢀtoꢀUARTꢀsettingꢀblockꢀisꢀusedꢀtoꢀconfigureꢀ
theꢀbaudꢀrate,ꢀdata,ꢀstopꢀbits,ꢀparity,ꢀflowꢀcontrolꢀandꢀ
dataꢀtransmit/receiveꢀdemo.ꢀThisꢀpageꢀcanꢀalsoꢀcontrolꢀ
theꢀoutputꢀRTSꢀandꢀDTRꢀtoggleꢀpins,ꢀCTS,ꢀRI,ꢀDSRꢀ
andꢀDCDꢀpinsꢀinputꢀstatus.
Theꢀ followingꢀ tableꢀ showsꢀ theꢀ configurationꢀ
descriptorꢀlength.
TheꢀfigureꢀforꢀtheꢀUSBꢀtoꢀUARTꢀisꢀasꢀfollows:
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
Theꢀmainꢀfigureꢀofꢀtheꢀprogramꢀupdateꢀblockꢀisꢀasꢀ
follows:
USBꢀtoꢀUARTꢀBridgeꢀoperatingꢀsteps:
•ꢀ Step1:ꢀSelectꢀUSBꢀtoꢀUARTꢀpage.
•ꢀ Step2:ꢀCheckꢀthatꢀdeviceꢀisꢀHT42B534-x.
•ꢀ Setp3:ꢀSelectꢀCOMꢀportꢀnumber.
•ꢀ Step4:ꢀSelectꢀbaudꢀrate.
•ꢀ Step5:ꢀSelectꢀoneꢀorꢀtwoꢀstopꢀbits.
•ꢀ Step6:ꢀSelectꢀparity.
•ꢀ Step7:ꢀSelectꢀflowꢀcontrolꢀfunction.
•ꢀ Step8:ꢀOpenꢀtheꢀselections.
Configurationꢀoperatingꢀsteps:
•ꢀ Step9:ꢀInputꢀtheꢀdataꢀtoꢀbeꢀtransmitted.
•ꢀ Step10:ꢀSendꢀdata.ꢀ
•ꢀ Step1:ꢀOpenꢀtheꢀHoltekꢀBridgeꢀVID/PIDꢀdevice.
•ꢀ Step2:ꢀChangeꢀcustomꢀdeviceꢀorꢀgoꢀtoꢀUSBꢀtoꢀ
UARTꢀpage.ꢀ
•ꢀ Step11:ꢀReceiveꢀdata.
•ꢀ Setp3:ꢀInputꢀVID/PIDꢀandꢀproductꢀstringsꢀ(Ifꢀtheꢀ
userꢀneedsꢀtoꢀchangeꢀcustomꢀdevice).
•ꢀ Step12:ꢀToggleꢀRTS/ꢀDTRꢀpins.
•ꢀ Step13:ꢀInputꢀCTS/RI/DSR/DCDꢀpinsꢀstatus.
•ꢀ Step4:ꢀHardwareꢀflowꢀcontrolꢀandꢀremoteꢀwakeupꢀ
setting.
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HT42B534-x
Application Circuits
Rev. 1.00
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December 09, 2016
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.ꢀDesignꢀnote:ꢀ10-SOPꢀpackageꢀonlyꢀforꢀtwoꢀpowerꢀapplication,ꢀtheꢀVCCꢀpowerꢀmustꢀbeꢀbelowꢀVDDꢀ
power.ꢀ(TheꢀVCCꢀpowerꢀcanꢀbeꢀfromꢀtheꢀLi-battery).
2.ꢀTheꢀUDETꢀpinꢀcanꢀusedꢀforꢀdetectꢀtheꢀUSBꢀplug-inꢀforꢀtransferꢀdata,ꢀdetectꢀtheꢀUSBꢀplug-outꢀforꢀentryꢀ
energyꢀsavingꢀmode.
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HT42B534-x
Package Information
Noteꢀthatꢀtheꢀpackageꢀinformationꢀprovidedꢀhereꢀisꢀforꢀconsultationꢀpurposesꢀonly.ꢀAsꢀthisꢀinformationꢀmayꢀbeꢀ
updatedꢀatꢀregularꢀintervalsꢀusersꢀareꢀremindedꢀtoꢀconsultꢀtheꢀHoltekꢀwebsiteꢀforꢀtheꢀlatestꢀversionꢀofꢀtheꢀPackage/
CartonꢀInformation.
Additionalꢀsupplementaryꢀinformationꢀwithꢀregardꢀtoꢀpackagingꢀisꢀlistedꢀbelow.ꢀClickꢀonꢀtheꢀrelevantꢀsectionꢀtoꢀbeꢀ
transferredꢀtoꢀtheꢀrelevantꢀwebsiteꢀpage.
•ꢀ PackageꢀInformationꢀ(includeꢀOutlineꢀDimensions,ꢀProductꢀTapeꢀandꢀReelꢀSpecifications)
•ꢀ TheꢀOperationꢀInstructionꢀofꢀPackingꢀMaterials
•ꢀ Cartonꢀinformation
Rev. 1.00
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HT42B534-x
8-pin SOP (150mil) Outline Dimensions
&
#
)
*
ꢁ
"
+
+
ꢀ
/
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
—
0.193 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. 1.00
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December 09, 2016
HT42B534-x
10-pin SOP (150mil) Outline Dimensions
ꢁ
ꢂ
$
)
*
ꢁ
#
+
+
ꢀ
/
0
,
=
-
.
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. 1.00
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December 09, 2016
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. 1.00
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December 09, 2016
HT42B534-x
16-pin NSOP (150mil) Outline Dimensions
ꢀ
$
'
)
*
ꢀ
&
+
+
ꢁ
/
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. 1.00
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December 09, 2016
HT42B534-x
Copyright© 2016 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/en/.
Rev. 1.00
16
December 09, 2016
相关型号：
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