0.8pcb - PUDC floating

[colinoflynn]

Presumably at some point PUDC got pin-swapped and no longer has it's pull resistor. Either way production mod can easily make this a pull-down, which should mean weak pull-ups on all FPGA pins.

[colinoflynn]

Marking fixedinrepo as mod documented on schematic, haven't updated PCB yet until we get a proper 0.9

[colinoflynn]

The fix is soldering a resistor between pin 22 of the R-Pi header & the GND pin next to it:

[colinoflynn]

This is now fixed in latest rev (0.9), default is now a pull-up on PUDC which disables pull-ups on I/O pins. But both are available so we can change the default back to this behavior.