CH341 is a USB bus adapter chip that provides asynchronous serial ports, print ports, parallel ports, and commonly used 2-wire and 4-wire synchronous serial interfaces through the USB bus. Programmers made with CH341 are often used to directly read and write 25 series SPI interface FLASH memories and 24 series IIC interface EEPROM memories, and are particularly well-known for use in bios flashing. The design uses the USB male connector as the input, and uses two jumper caps to select whether the chip supply voltage is 3.3V or 5V. Lead out SPI, IIC, UART, EPP/MEM and other interfaces through pin headers.
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