CH9328 is a serial port to HID keyboard chip, which is recognized as a standard USB HID keyboard device on the computer. CH9328 is used for one-way data transmission. It can receive data (such as ASCII code) sent by the serial port, and according to the HID keyboard device specification, the data is packaged into standard keyboard code values and uploaded to the computer through the USB port. Supports 12Mbps full-speed USB transmission, compatible with USB V2.0, and built-in crystal oscillator. The default serial communication baud rate is 9600bps, which supports multiple serial communication formats and various common baud rate settings.
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