![]() Download and Save the PL2303 Installer Program here:Ģ. When it prompts you, plug in the PL2303 USB-To-Serial adapter and click “Continue”.ġ. Unplug all USB-To-Serial adapters and Double click on the installer “PL2303_64bit_Installer.exe”ģ. Download and Save the PL2303 Installer Program hereĢ. Tested with my PL2303HX USB devices and PuTTY serial and a jumper connecting TXD-RXD as loopback to see typed characters coming back in.ġ. I did this for two PL2303HXA based USB interfaces. Windows update, which is by default automatic getting the latest drivers, make it impossible to install older drivers, just gets overwritten very fast.īut you can battle this and get the Prolific driver working again. Reason: Prolific made an update to their Windows drivers to fight the fake IC’s coming from China, like FTDI did (see my FTDI unbricking article) and made older devices unusable. And they do not work anymore! Yellow mark in Device Manager, device cannot start. ![]() Like many I have imported from China, USB to Serial devices with IC’s made by Prolific. Device manager shows PL2303HXA PHASED OUT SINCE 2012. Due to fakes, older (not fake!) IC’s made by Prolific are not supported by the current Prolific driver in Windows. ![]()
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