This is one of the Convert Chip types.
Part Number : CH341A
Function : USB Bus Convert Chip
Package : SOP 28 Pin
Manufactures : Jiangsu QinHeng ( http://wch.cn/ )
CH341 is a USBbus convert chip, providing UART, printerport, parallel and synchronous serial with 2-wire or4-wire through USBbus. In UART mode, CH341 provides alternant rate control signals such as serial transfer enable, serial receive in ready etc. It also supplies common MODEM communication signal in order to expand UART for computer orupgrade common synchronous interface device to USB bus directly.
In printer port mode, CH341 supplies standard USB printerport which compounds USB relevant protocol and Windows operate system used toupgrade ordinary parallel printer to USB bus directly. In parallel mode, CH341 gives out8-bit parallel in EPP or MEM mode. It canbe used to input/output data directly without MCU/DSP.
1. Full speed USB device interface, conforms to USB Specification Version2.0, only needs crystal and capacitance external.
2. Optional:define Vender ID, production ID and listnumber through external low-cost serial EEPROM.
3. Supports5V and3.3Vpower source.
4. Low-cost, directly convert serial peripheral equipment, parallel printer and parallel peripheral