I made a dumb mistake, and as a result, the supply pins on the TQFP
atmega32 are all wrong. I am ordering a new PCB, but until it gets
here, I wanted to see if I could salvage the current board for some
testing. First off, the atmega32 has 3 VCC pins, and 4 GND pins. Do
they all have to be supplied for the circuit to work, or can I get by
with just one? I was also wondering, should the AREF and AVCC be
attached to something?
One other question -- can I retask the SS pin (PB4) as a general-purpose
IO if I'm using SPI as master only?