Guide: GPIO and COM port on i5-8250 industrial pc

4 channel output GPIO0~GPIO3, operation I/O interface oxA06, each bit correspondence as follows:

GPIO0 GPIO1 GPIO2 GPIO3
0xA06.bit0 0xA06.bit1 0xA06.bit2 0xA06.bit3

4 channel output GPIO4~GPIO7, operation I/O interface oxA06, each bit correspondence as follows:

GPIO4 GPIO5 GPIO6 GPIO7
0xA06.bit4 0xA06.bit5 0xA06.bit6 0xA06.bit7

Hardware definition:

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GPIO on HYSTOU mini pc P12-i5-8250U:

Port-EN960X

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On P12-i5-8250U, COM1 and COM2 can be changed to RS232, RS422 and RS485 from Bios, guide pls click here, other 4 COM port definition below:

TXD3+RXD3+GND = COM3 (RS232)

TXD4+RXD4+GND = COM4 (RS232)

TXD5+RXD5+GND = COM5 (RS232)

TXD6+RXD6+GND = COM6 (RS232)

Totally it is 6 COM port onboard of P12-i5-8250 mini pc.

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