In PWM mode, the ESM_MCU monitors the high-pulse and low-pulse duration times its PWM input signal as follows:

• After a falling edge, the ESM_MCU starts monitoring the low-pulse time-duration. If the input signal remains low after exceeding the maximum low-pulse time-threshold (t_{LOW_MAX_TH}), the ESM_MCU detects a bad event and the low-pulse duration counter reinitializes. Each time the signal further exceeds the maximum threshold, the ESM_MCU detects a bad event. On the next rising edge on the input signal, the ESM starts the high-pulse time-duration monitoring
• After a rising edge, the ESM_MCU starts monitoring the high-pulse time-duration. If the input signal remains high after exceeding the maximum high-pulse time-threshold (t_{HIGH_MAX_TH}), the ESM_MCU detects a bad event and the high-pulse duration counter reinitializes. Each time the signal further exceeds the maximum threshold, the ESM_MCU detects a bad event. On the next falling edge on the input signal, the ESM_MCU starts the low-pulse time-duration monitoring.

In addition, the ESM_MCU detects a bad-event in PWM mode if one of the events that follow occurs on the deglitched signal of the input pin nERR_MCU:

• A high-pulse time-duration that is longer than the maximum high-pulse time-threshold (t_{HIGH_MAX_TH}) that is configured in register bits ESM_MCU_HMAX[7:0].
• A high-pulse time-duration that is shorter than the minimum high-pulse time-threshold (t_{HIGH_MIN_TH}) that is configured in register bits ESM_MCU_HMIN[7:0].
• A low-pulse time-duration that is longer than the maximum low-pulse time-threshold (t_{LOW_MAX_TH}) that is configured in register bits ESM_MCU_LMAX[7:0].
• A low-pulse time-duration that is less than the minimum low-pulse time-threshold (t_{LOW_MIN_TH}) that is configured in register bits ESM_MCU_LMIN[7:0].

The ESM_MCU detects a good-event in PWM mode if one of the events that follow occurs on the deglitched signal of the input pin nERR_MCU:

• A low-pulse time-duration within the minimum and maximum low-pulse time-thresholds is followed by a high-pulse time-duration within the minimum and maximum high-pulse time-thresholds, or
• A high-pulse duration within the minimum and maximum high-pulse time-thresholds is followed by a low-pulse duration within the minimum and maximum low-pulse time-thresholds

Register bits ESM_MCU_HMAX[7:0] set the maximum high-pulse time-threshold (t_{HIGH_MAX_TH}) for the ESM_MCU. Use Equation 15 and Equation 16 to calculate the worst-case values for the t_{HIGH_MAX_TH}:

ESM_MCU_HMIN[7:0] set the minimum high-pulse time-threshold (t_{HIGH_MIN_TH}) for the ESM. Use Equation 17 and Equation 18 to calculate the worst-case values for the t_{HIGH_MIN_TH}:

ESM_MCU_LMAX[7:0] set the maximum low-pulse time-threshold (t_{LOW_MAX_TH}) for the ESM_MCU. Use Equation 19 and Equation 20 to calculate the worst-case values for the t_{LOW_MAX_TH}:

ESM_MCU_LMIN[7:0] set the minimum low-pulse time-threshold (t_{LOW_MIN_TH}) for the ESM. Use Equation 21 and Equation 22 to calculate the worst-case values for the t_{LOW_MIN_TH}:

Please note that when setting up the minimum and the maximum low/high-pulse time-thresholds need to be configured such that clock tolerances from the LP8764-Q1 and from the processor are incorporated. Equation 23, Equation 24, Equation 25, and Equation 26 are a guideline on how to incorporate these clock-tolerances: