Hello,
Please answer following question from customer.
Customer checked following procedure using their board.
(They are using CANWU and MCU EMS monitor.)
1. Change sate from ACTIVE to SAFE by MCU EMS error(ERROR_PIN_FAIL=1)
2. Keep CANWU=1 and send WR_CAN_STBY.
(This procedure assumes that CANWU and WR_CAN_STBY occur at the same time.)
3. Above situation transitions the state to STANDBY without register initialization and transition to RESET and DIADNOSTICS to restart.
4. MCU clear the ERROR_PIN_FAIL in DIAGNOSTIC state and set DIAG_EXIT=1 and DIAG_EXIT_MASK=0, but TPS65381 doesn’t go to ACTIVE state and transition to SAFE state.
And LOCLK=1 is observed from MCU during 100ms.
I did the same Operation using EVM and confirmed same phenomenon.
(Please see the attached GUI capture.)
Please advise the reason of LOCLK and change the state to SAFE(not ACVTIVE) in spite of clear the ERROR_PIN_FAIL.
Best Regards.