Hi Amgen,

Thanks for the reply. Yes, ProgIDRx is cleared. And its value is $A (or10). But, I haven't been able to receive it yet because nothing is being received. SERIN always exits upon the 5 second Timeout variable "PassProg" as if nothing is present at the pin.

And, in addition, If I had noise on the pin, SERIN would never time out. So, that indicates that SERIN is, at least, partially working, I would think.