readme.txt Driver File Contents (

Release Note, PL-2303 Windows 64-bit Driver v2.0.1.8, Prolific Edition
    . Windows XP x64-bit Edition
    . USB host controller
    . Device using PL-2303H/X/HX controller

Supported device ID:

Driver Version: v2.0.1.8 (non-logo)

Driver Remover/Uninstaller:

Driver Installation Procedure:

1. Copy driver files to folder in computer.
2. Plug in PL-2303 and wait for Windows to prompt for driver.
3. Browse to the folder containing the driver files and let Windows install the driver.
4. Go to Control Panel-System-Device Manager and check if PL-2303 USB to Serial Port device is properly installed.

Known Limitation:
Windows XP Professional x64 Edition HyperTerminal Issue

The data transfer rate of PL-2303 is very slow when using the new HyperTerminal (5.2.3790.1830) program in Microsoft Windows XP Professional x64 Edition Version 2003 Service Pack 1. 

Cause & Workaround:
The PL-2303 uses software control to simulate Serial COM port, so the driver needs to send more data in each BulkOut command. However, it seems that the newer version of HyperTerminal (v5.2.3790.1830) in Windows XP Professional x64-Edition is using other method in sending data byte by byte that limits the PL-2303 driver to achieve the transmit rate set by users. 

When using an older version of HyperTerminal (v5.1.2600.0) from Windows XP SP2 (32-bit Version 2002), the data transfer is normal. Prolific is trying to feeback this issue to Microsoft if the HyperTerminal program in Windows x64-bit Edition could be updated. 

Prolific advices not to use the HyperTerminal program (v5.2.3790.1830) in Windows x64-Edition until this limitation is resolved. Prolific recommends to use an older version of HyperTerminal or use other software programs.

Prolific Technology Inc.

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How To Update Drivers Manually

After your driver has been downloaded, follow these simple steps to install it.

  • Expand the archive file (if the download file is in zip or rar format).

  • If the expanded file has an .exe extension, double click it and follow the installation instructions.

  • Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.

  • Find the device and model you want to update in the device list.

  • Double-click on it to open the Properties dialog box.

  • From the Properties dialog box, select the Driver tab.

  • Click the Update Driver button, then follow the instructions.

Very important: You must reboot your system to ensure that any driver updates have taken effect.

For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.

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