What's the difference between SPI mode 0 and 3? How do I translate that into a setup difference in the code?
I believe pullup resistors are required for the SI, SO, and CS lines, correct? If so, what is the largest ohm resistor I can use (to limit current leakage)? I assume this is a function of bus frequency. I will be no faster than 4 Mhz and am running 3.3v.