UART / TTL / RS232 / RS485 serial port to USB keyboard protocol CH9328 HID IO

UART / TTL / RS232 / RS485 serial port to USB keyboard protocol CH9328 HID IO

SER2UKB is a pure hardware solution of the CH9328 series serial port to USB keyboard protocol, which supports plug and play, converts serial port data to USB keyboard values, simulates keyboard input, and displays it at the cursor.

This is a one-way transmission. The direction from serial port to USB cannot be transferred from USB to serial port.

● Support 12Mbps full-speed USB transmission, compatible with USB V2.0, only crystals and capacitors are needed for peripheral components.

● The default serial communication baud rate is 9600bps, which supports multiple serial communication formats and various common baud rate settings.

● Support 5V power supply voltage and 3.3V power supply voltage.

● You can configure the VID, PID, and various string descriptors of the chip.

● You can configure the default baud rate of the chip.

● Comply with USB related specifications and HID related device specifications.

● Multiple working modes, with different requirements, can simulate full keyboard function.

The default baud rate is 9600bps, which supports common communication baud rates: 50, 75, 100, 110, 134.5, 150, 300, 600, 900, 1200, 1800, 2400, 3600, 4800, 9600, 14400, 19200, 28800, 33600, 38400, 56000, 57600, 76800, 115200. The baud rate error of the signal sent by the serial port is less than 0.3%, and the allowed baud rate error of the signal received by the serial port is not less than 2%.

2x4 double-row gold-plated pins, the upper row is serial port and RS485 output, and the lower row is IO port, with silk screen marking next to each pin.

Upper pin definition

VCC 5V voltage output (TTL level default is 3.3V output)

TX- serial port transmitting end, RS485 level B / D- end

RX + serial port receiving end, RS485 level A / D + end

GND ground

Lower pin definition

IO4 No. 4 IO pin

IO3 No. 3 IO pin

IO2 No. 2 IO pin

IO1 No. 1 IO pin

Packaging: TTL / RS232 / RS485 serial port to USB keyboard module