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PL2303 Driver Setup Installer, Prolific Edition
Setup Installer Revision Note History

Installer version & Build date: 1.16.0 (2016-10-7) Windows Vista/7/8/8.1/10 (32 & 64-bit) WDF WHQL Driver: v3.8.3.0 (09/19/2016)

System Requirement:

USB 1.1/2.0/3.0/3.1 Host Controller
Device using PL2303HXA/XA/HXD/EA/RA/SA/TA/TB version chips
Supports the following Windows OS Family (32 and 64 bit):
Windows XP SP3
Windows Server 2003
Windows Vista
Windows Server 2008
Windows 7
Windows Server 2008R2
Windows 8
Windows Server 2012
Windows 8.1
Windows Server 2012R2
Windows 10 (TH/RS)
Windows Server 2016

NOTE:

PL2303HXA/XA EOL chip versions (discontinued) will NOT be supported in Windows 8/8.1/Server2012/Server2012R2 and Windows 10 onwards.
Download latest PL2303 CheckChipVersion tool program to check chip version in Windows 7. (Or contact your cable vendor)
Prolific recommends cables with PL2303HXD or PL2303TA chip.
Windows 98/ME/2000/XP driver technical support are discontinued.

Supported device ID and product strings:

VID_067B&PID_2303 for "Prolific USB-to-Serial Comm Port" (PL2303 series)
VID_067B&PID_2304 for "Prolific USB-to-GPIO/PWM Port" (PL2303TB chip)

Driver Versions:

WDF WHQL Driver: v3.8.3.0 (09/19/2016) - for Windows Vista/7/8/8.1/10; Server2008/2008R2/2012/2012R2/2016
WDM WHQL Driver: v2.1.51.238 (10/22/2013) - for Windows 2000/XP/Server2003

Release Notes:

PL2303 Driver Installer v1.16.0
Installer & Build date: 1.16.0 (2016-10-07)
GUID:ECC3713C-08A4-40E3-95F1-7D0704F1CE5E

 

Windows WDF WHQL Driver v3.8.3.0 (09/19/2016):

Driver Revision Change:

Fixed COM port no response (freeze) when doing continuous quick USB hotplug with serial mouse attached.

Previous History:

Driver from v3.8.2.0 (Driver Installer v1.15.0): {unreleased}

Fixed RS485 compatibility (using RTS pin control) in PL2303HXD OTPROM Writer setting.
For RS485 cable based on Prolific reference schematic, need to use latest EEWriter v2.2.0.0 or above.

 

Driver from v3.8.1.3 (Driver Installer v1.14.0):

Formal submit driver for Windows 10 Redstone version 1607 Build 14393 (Anniversary Update) and Server 2016 HLK certification.
Fixed customer issue for 19200bps baudrate timing (PL2303TA chip) on BGM device.

 

Driver from v3.8.0.0 (Driver Installer v1.13.0): {unreleased}

Add Windows 10 Device Guard compatibility (Hypervisor Code Integrity Readiness HLK Test).
Fixed Notebook PC USB Docking hotplug issue in Windows 7 and Intel USB 3.0 host (cannot release COM port).

 

Driver v3.6.81.357 (Driver Installer v1.12.0):

Fixed timing delay issue.

 

Driver v3.6.78.350 (Driver Installer v1.11.0):

Fixed customer BSOD issue when plug in USB 3.0 host controller under Windows 8.1.
Supports GPIO default value configuration in external EEPROM or OTPROM using EEWriter v2.1.0.0.
Passed Windows 10 logo certification (HLK).

 

Driver v3.4.67.325 (Driver Installer v1.10.0):

Fixed Win7/8 to WinXP data transfer customer issue (38400bps). Adjust timeout constant.
Fixed problem with SecureCRT program when setting DTR/DSR flow control.
Fixed ClearCommError issue.
Added 5787 and 300kbps baudrate support.
Supports "IRP_MJ_CLEANUP". Fixed customer application cannot re-open COM port after closing port.
Improve device enumeration when PC reboots and device is plugged in.

 

Driver v3.4.62.293 (Driver Installer v1.9.0):

Driver will delay 1.5ms when AP execute GET_MODEMSTATUS.
Fixed teraterm timeout/slow response issue.
Fixed GPIO 2 & 3 function for HXD chip.
Add 3250000bps baud support.
GPIO 2,3 set as default input pin.
Add auxiliary GPIO 4~7 driver support for HXD chip.
Fixed modem issue (Disable SerialWdmFileRead).
Add 256000 bps baud support for PL2303TA/TB.
Fixed customer VB AP issue.
Improve Serial Mouse enumeration.

 

Driver v3.4.48.272 (Driver Installer v1.8.0 & 1.8.19):

Fixed 110 bps on PL2303RA/SA/EA/TA/TB.
Modify CheckChipVersion API (do not lock VID/PID).
Fixed HXD chip is detected as HXC chip when BCD is written as 0300 instead of 0400.
Added 80bps baud support.
Fixed GPS device will be detected as MS Serial Ballpoint device.
Fixed driver conflict with different VID/PID device. (STATUS_OBJECT_NAME_COLLISION)
Fixed Teraterm loopback timeout issue.

 

Driver v3.4.36.247 (Driver Installer v1.7.0):

Fixed Putty/HTerm BSOD issue in Win7 64-bit. (for HXD chip only)
Fixed HyperTerminal timeout issue when transferring large file. (for HXD chip only)
Fixed Windows HCK logo test for Windows 8, 7, Vista WHQL driver.

 

Driver v3.4.31.231:

Added driver support for new chip versions (PL2303EA, RA, SA).
Supports new CheckChipVersion v1.0.0.2 and above program for checking all Prolific chip version.
Fixed COM Port won't disappear when unplug PL2303 during data transfer (Write Timeout issue).
Fixed Putty program BSOD issue on continuous transfer at 115200bps.
Fixed 12Mbps baudrate support for PL2303TB chip version.
Does NOT support Windows 8 for EOL chip versions (PL2303H, PL2303HXA, PL2303XA).
For Windows 8: use PL2303HXD, PL2303TA, PL2303EA, PL2303SA, PL2303RA, PL2303TB.

 

Driver v3.4.25.218:

Added driver support for Prolific next-gen USB-to-Serial chips (Codename TA/TB).
old driver will not work on baudrates higher than 115200bps.
No driver functional difference for current H/HX/X chip versions.

 

Driver v3.3.17.203:

Use different service name in INF file to avoid driver conflict with XP INF driver.
change line in INF file to {Serial.SVCDESC = "Prolific Serial port WDFdriver"}
Added USB Selective Suspend power saving feature requested by Notebook PC vendors.
Chip will go to sleep mode when idle for 10 seconds and COM port not open.
Chip will NOT go to sleep mode when COM port is OPEN.
requires to write Remote Wakeup in external EEPROM.
Modify "SerialUndoExternalNaming" routine.
Fix COM port is not removed in registry when device is unplug and program still open.
update registry HKEY_LOCAL_MACHINEHARDWAREDEVICEMAPSERIAL COMM when unplug and replug.
Added support for TransmitCommChar() function.
Added SpinLock function to fix customer GPS application.

Windows WDM 2000/XP/Server2003 Driver v2.1.51.238 (10/22/2013)

Beginning September 2014, Windows XP driver will not be updated anymore.

 

Driver Change from v2.1.44.226 (Driver Installer v1.8.0 & 1.8.19):

Driver will delay 1.5ms when AP execute GET_MODEMSTATUS.
Fixed GPIO 2 & 3 function for HXD chip.
Add 3250000bps baud support.
GPIO 2,3 set as default input pin.
Add auxiliary GPIO 4~7 driver support for HXD chip.
Add 256000 bps baud support for PL2303TA/TB.
Improve Serial Mouse enumeration.
Fixed WHQL test using HCK 2.0.

 

Driver Change from v2.1.35.211 (Driver Installer v1.7.0):

Fixed 110 bps on PL2303RA/SA/EA/TA/TB.
Modify CheckChipVersion API (do not lock VID/PID).
Fixed HXD chip is detected as HXC chip when BCD is written as 0300 instead of 0400.
Added 80bps baud support.
Fixed GPS device will be detected as MS Serial Ballpoint device.
Fixed Disable-Enable device issue in Windows 2000 Device Manager.

 

Driver Change from v2.1.30.193:

Fixed write timeout intermittent issue (COM port won't disappear) during USB surprise removal.
Fixed new Windows HCK logo test for XP WHQL driver.

 

Driver Change from v2.1.27.185:

Added driver support for new chip versions (PL2303EA, RA, SA).
Supports new CheckChipVersion v1.0.0.2 and above program for checking all Prolific chip version.
Fixed COM Port won't disappear when unplug PL2303 during data transfer (Write Timeout issue).
Fixed 12Mbps baudrate support for PL2303TB chip version.

 

Driver Change from v2.0.16.166:

Added driver support for Prolific next-gen USB-to-Serial chips (Codename TA/TB).
old driver will not work on baudrates higher than 115200bps.
No driver functional difference for current H/HX/X chip versions.

 

Driver Change from v2.0.13.130:

Use different service name in INF file to avoid driver conflict with Vista/7 INF driver.
change line in INF file to {Serial.SVCDESC = "Prolific Serial port WDMdriver"}
Added 10ms delay (downstream buffer) on close COM port to fix customer MCU application.

 

Language Support:
- English (default)
- Chinese (Traditional)
- Chinese (Simplified)
- Japanese

Download Latest Driver here:
http://www.prolific.com.tw/US/ShowProduct.aspx?p_id=225&pcid=41

 

Counterfeit Warning!!!

Please be warned that counterfeit/fake PL-2303HX Chip Rev A (or PL-2303HXA) USB to Serial Controller ICs using Prolific's trademark logo, brandname, and device drivers, are being sold in the China market. Counterfeit IC products show exactly the same outside chip markings but generally are of poor quality and causes Windows driver compatibility issues (Yellow Mark Error Code 10 in Windows 7 Device Manager). We issue this warning to all our customers and consumers to avoid confusion and false purchase. Only purchase branded cables that provide technical support and warranty service. Prolific does not manufacture nor sell end-product cables.

How to Install Driver

1. Unplug any PL2303 USB Device first.
2. Run Driver Installer EXE program to install. Wait to finish.
3. Plug PL2303 USB Device and go to Device Manager to check COM Port number.
4. If PL2303 is embedded, you might need to restart Windows or rescan hardware in Device Manager.
5. Refer to PL2303 Windows Driver User's Manual.

NOTE: For silent install, include the syntax "/s" at the end of the EXE installer program.
For example: "PL2303_Prolific_DriverInstaller_v1.10.0.exe /s"
Prolific Technology Inc. http://www.prolific.com.tw