Correct, the microcontroller should be connected to ground on pins 8 and 22 (not 11, unless the mode switch is flipped). What I was asking in question 1 above is if pin 4 is actually connected to ground even though it’s not supposed to be (use your continuity tester on your meter to find out…when the pedal is powered on). If pin 4 isn’t at ground potential, then tell me what DC voltage is on pin 4 when the pedal is on.
By engaging the routine in the code to flash the software number, it’s acting like pin 4 is being held low upon power on. We just have to figure out what’s holding it low….either there is some sort of external short on pin 4 or the microcontroller is internally damaged.
Let me know.
-Brach