Datasheet Summary
CH340 Datasheet (I)
USB to Serial Port Chip CH340
Datasheet Version: 3B http://wch.cn
1. Introduction
CH340 is a USB bus converter chip which converts USB to serial port or printer port.
In UART mode, CH340 provides standard MODEM signals, used to extend serial port for puters, or upgrade directly from normal serial device to USB bus. For more information about converting USB to printer interface, please refer to the CH340DS2 datasheet. puter
USB or Other
USB Host
UART/RS232/RS485 Convert Parallel Printer to USB Printer
2. Features l Full-speed USB device interface, USB 2.0 patible. l Emulate standard UART interface, used to upgrade the original serial peripheral...
