Onyx-MM-DIO

Digital I/O

6 8-bit bidirectional ports (2 82C55 chips)

Digital I/O ports on Onyx-MM-DIO require direction to be set with dscDIOSetConfig() before use. One configuration byte is required for each 82C55 chip.

All DIO lines power-up in input mode and have readback capability.

All DIO lines have 10K Ohm pull-up resistors. Interrupts Not supported on this board.

Onyx-MM-DIO Universal Driver Functions

• dscDIOClearBit()
• dscDIOInputBit()
• dscDIOInputByte()
• dscDIOOutputBit()
• dscDIOOutputByte()
• dscDIOSetBit()
• dscDIOSetConfig()