Communication Protocols

PHCC Communication Interfaces, Busses, and Protocols

The following communication protocols are used in the PHCC system:

• RS-232 (between PHCC motherboard and the host PC).
• Digital Output Type A bus (using the AP2PP protocol).
• Digital Output Type B bus (using a two-wire syncronous serial interface).
• I²C bus.

The PHCC system and the host PC have their own protocol stacked on top of the RS-232 bus. Details of this protocol can be found in the following documents:

• Host to PHCC
• PHCC to Host