USB-I/O Interface Adapter GPIO-24. Programmer's Reference Manual.
Chapter 8. Comparator Module
There are eight possible modes of operation for the comparators.
Bits 3-0: MODE in Byte 2: CMP_CFG of GPIO_SET_CMP_CFG command are used to select these modes.
The following modes are available:
MODE = 0 – Comparators are turned off.
MODE = 1 – One independent comparator with output.
MODE = 2 – Two independent comparators.
MODE = 3 – Two independent comparators with outputs.
MODE = 4 – Two common reference comparators.
MODE = 5 – Two common reference comparators with outputs.
MODE = 6 – Four inputs are multiplexed to two comparators.
MODE = 7 – Comparators reset.
