Download latest version of verified & working Windows 8.1 x64 & x86 driver for CH340, CH340G USB to Serial converter. CH340 driver for Windows 8.1 x64 & x86 Driver details CH340, CH340G & CH341 (USB-SERIAL chip) V3.4 Driver Version = 08/08/2014, 3.4.2014.08 CH340 Windows 8 driver installation CH340G converter connection and pinout for programming