AAEON TKS-G50-QM77 - Manual (Page 112)

E m b e d d e d B o x T K S - G 5 0 - Q M 7 7
AppendixE Digital I/O Ports E - 3
E.2 DIO Programming
TKS-G50-QM77 utilizes ITE IT8728F chipset as its Digital I/O controller.
Below are the procedures to complete its configuration and the AAEON
initial DIO program is also attached based on which you can develop
customized program to fit your application. There are three steps to
complete the configuration setup: (1) Enter the MB PnP Mode; (2) Modify
the data of configuration registers; (3) Exit the MB PnP Mode. Undesired
result may occur if the MB PnP Mode is not exited normally.