Thank you for cluing me in: I have been way overfocused on my current
design approach.
RPi3B will suit perfectly for new front end on one of our instruments
and may well subsume most of the computation from the main PCB processor.
Can you help me with a power connection question?
I want to take the whole GPIO connector to my main board with a 40 pin
ribbon cable (I only need UART and a couple of TTLs), but the display is
currently powered from jumpers on this header. I hate to have multiple
connectors to a single header: asks for assembly trouble.
Is it OK to supply 5.25v to both microUSBs rather than feed-through?
Lacking schematics, I am not sure.
Again thanks for your help.
Graham.