CH341A Datasheet Text
The DataSheet of CH341 (the first)
1
USB bus convert chip CH341
English DataSheet Version:2D http://wch.cn http://wch-ic.
1. Introduction
CH341 is a USB bus convert chip, providing UART, printer port, parallel and synchronous serial with 2-wire or 4-wire through USB bus. In UART mode, CH341 provides alternant rate control signals such as serial transfer enable, serial receive in ready etc. It also supplies mon MODEM munication signal in order to expand UART for puter or upgrade mon synchronous interface device to USB bus directly. In printer port mode, CH341 supplies standard USB printer port which pounds USB relevant protocol and Windows operate system used to upgrade ordinary parallel printer to USB bus directly. In parallel mode, CH341 gives out 8-bit parallel in EPP or MEM mode. It can be used to input/output data directly without MCU/DSP. Besides, CH341A also supports some mon synchronous serial such as 2-wire (SCL, SDA) and 4-wire (CS, SCK/CLK, MISO/SDI/DIN and MOSI/SDO/DOUT) interface.
UART/RS232/RS485/RS422 D+ DCH341 Convert chip Parallel printer to USB printer puter and other USB host
EPP parallel and MEM parallel mon 2-wire and 4-wire synchronous serial
2. Features
2.1.Introduction
- Full speed USB device interface, conforms to USB Specification Version 2.0, only needs crystal and capacitance external.
- Optional: define Vender ID, production ID and list number through external low-cost serial EEPROM.
- Supports 5V and 3.3V power source.
- Low-cost, directly convert serial peripheral equipment, parallel printer and parallel peripheral equipment.
- SOP-28 and SSOP-20 package lead free, patible with RoHS.
- Only patible with application layer because interfaces are diverted via USB.
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