Big discussion via email yesterday motivated by Chuck about whether we can add a capability to use the Can-Do modules as a bit pipe between a CPU in the experiment module and the IHU. The end result is that yes, we can do it.

My proposal is that we implement byte-wide in and out busses. Two of the "spare" outputs and two of the analog input channels get taken over to serve as request/acknowledge handshake lines. The remaining analog inputs and the remaining two digital outputs continue to behave as they would in "normal" mode. Data is always sent in blocks of 8 bytes. The module's stream addresses for this capability are the same as for the command/control protocol but with the high order bit flipped, so that this bit-pipe function runs at lower priority than command and telemetry.