This anomaly applies to Revision 3, build codes QFAA-Gx0, QFAB-Gx0, CIAA-Gx0.
It was inherited from the previous SoC revision Revision 2.
Symptoms
The RXPTRUPD event is generated when the STOP task is triggered, even though reception (RX) is disabled. Similarly, the TXPTRUPD event is generated when the STOP task is triggered, even though transmission (TX) is disabled.
Conditions
A previous transfer has been performed with RX/TX enabled, respectively.
Consequences
The indication that RXTXD.MAXCNT words were received/transmitted is false.
Workaround
Ignore the RXPTRUPD and TXPTRUPD events after triggering the STOP task. Clear these events before starting the next transfer.