6.8.1 Digital I/O
Six 8-bit I/O ports are implemented: ports P1 to P6:
- All individual I/O bits are independently programmable.
- Any combination of input, output, and interrupt conditions is possible.
- Edge-selectable interrupt input capability for all the eight bits of ports P1 and P2.
- Read and write access to port-control registers is supported by all instructions.