I built a first-run of boards (qty 10) using the MSP430F6726IPN (TQFP80 package). Everything went well, so I ordered more panels and started assembly. The first run was 18 boards (I believe in testing as I ramp up production). Sure enough, I have an issue with the current batch of 18 boards regarding the ADC10. Using the same firmware and PCB layout, the new board's ADC10 always returns "0x0000" for all channels. The only difference is the MSP430 lot numbers. The working MSP430s are "24CRK2T(G4)" and the non-working ones are "55C6D3T(G4)". Has anything changed between these two runs? They both show "Rev A".
I have read the errata for this processor for which there are 2 issues listed with the ADC10, but neither of those apply to my current problem.
Any ideas?
Thanks in advance.