Question about custom BOB for a 7i92

1 more questions and I'm done for now, I promise lol.

Can the 7i92H be powered through the 26pin headers for 5V or must it be powered by the 2pin connector?

 

You can backpower the 7I92 via its I/O connectors (make sure you use all 4 wires)

I've got a 7i92th on the way, is there a mechanical drawing for the "h" version? Trying to get the pin headers lined up on my BOB but the manual shows the version with a DB25 in the 2nd position. Also, MOSI pin can be omitted from the pinfile if not in use right?

 

You can drop the MOSI pin if the SPI devices do not require any data sent to them
(that is, they are read only devices and need only a clock and /CS  to output date)

This is the pinout I need the firmware for. 

Hopefully I didn't make any mistakes. I ran out of IO so I had to use a decoder chip, SN74LVC1G139 for SPI CS lines. 

I'll try and get to this in the next few days.

Note your pinout is missing the CS frame pin

(this enables the external /CS decoder, otherwise there is no way to de-assert /CS)

You could gain 4 pins by using an inmux module for the 8 GPIO inputs
This needs a 74HC251 external mux and now 4 interface pins (A0,A1,A2 and D)
It also add hardware debouncing and 4 MPG encoders