SPRZ487F May 2022 – December 2024 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP
PRG: CTRL_MMR STAT registers are unreliable indicators of POK threshold failure
The POK overvoltage and undervoltage flags in the CTRL_MMR PRG STAT registers are unreliable indicators of whether the POK has seen a failure. As a result, they are being marked as Reserved in the device Technical Reference Manual (TRM).
Register names affected: WKUP_CTRL_MMR1_PRG_PP_x_STAT
The filtered POK output updates ESM flags.
Upon POK initialization (i.e. enable), the ESM flags should be cleared (due to comparisons carried out during the bandgap and / or the POK settling time). After this initial clear, the ESM flags can be used as a reliable indicator of failure (or no failure) from the POKs.