For testing, we took 5 boards. Out of the 5, the same issue (USS Error Code 129) was observed on 2 boards. On the two boards with the issue, we probed the USSXTIN and USSXTOUT pins and found no signals on either pin. However, on the good boards, we observed signals (8 MHz) on both USSXTIN and USSXTOUT. Initially, all 5 boards were working properly, but later the issue occurred on 2 of them.
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