The ESM_MCU has two of its own configurable delay-timers that are reset when the device clears the ESM_MCU_START bit. Below steps describe the procedure through which the ESM_MCU goes in case it detects an ESM-error:

1. If the respective mask bit ESM_MCU_PIN_MASK=0, the device sets interrupt bit ESM_MCU_PIN_INT , and pulls the nINT pin low.
2. The ESM starts the delay-1 timer (configurable through related ESM_MCU_DELAY1[7:0] bits).
3. If the ESM-error is no longer present and MCU has cleared the interrupt bit ESM_MCU_PIN_INT before the delay-1 timer elapses, the device releases the nINTpin, the ESM resets the delay-1 and delay-2 timers and continues to monitor its input pin.
4. If the ESM-error is still present, or if MCU has not cleared the interrupt bit ESM_MCU_PIN_INT , and the delay-1 timer elapses, then the ESM clears the ENABLE_DRV bit if bit ESM_MCU_ENDRV=1.
5. If the delay-2 timer (configurable through related ESM_MCU_DELAY2[7:0] bits) is set to 0, then the ESM skips steps 6 of this list, and performs step 7.
6. If the delay-2 timer is not set to 0, then:
   1. ESM starts the delay-2 timer,
   2. If ESM_MCU_FAIL_MASK = 0, the device sets interrupt bit ESM_MCU_FAIL_INT and pulls the nINT pin low and starts the delay-2 timer.
7. If the ESM-error is no longer present and the MCU has cleared the related interrupt bits listed below before the delay-2 timer elapses, the device releases the nINTpin, the ESM resets the delay-1 and delay-2 timers and continues to monitor its input pin:
   • ESM_MCU_PIN_INT (and ESM_MCU_FAIL_INT if set in step 6)
8. If the ESM-error is still present, or if MCU has not cleared the interrupt bits ESM_MCU_PIN_INT and ESM_MCU_FAIL_INT , and the delay-2 timer elapses, then the device:
   1. clears the ESM_MCU_START BIT
   2. sets interrupt bit and ESM_MCU_RST_INT, which the device handles as an ESM_MCU_RST trigger for FSM, described in Table 8-1
   3. After this trigger handling completes, the device re-initializes the ESM_MCU

ESM_MCU_DELAY1[7:0] set the delay-1 time-interval (t_DELAY-1) for the ESM_MCU . Use Equation 11 and Equation 12 to calculate the worst-case values for the t_DELAY-1:

ESM_MCU_DELAY2[7:0] bits set the delay-2 time-interval (t_DELAY-2) for the ESM_MCU . Use Equation 13 and Equation 14 to calculate the worst-case values for the t_DELAY-2: