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L99PM62XP Datasheet(PDF) 27 Page - STMicroelectronics |
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L99PM62XP Datasheet(HTML) 27 Page - STMicroelectronics |
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27 / 98 page  L99PM62XP Description Doc ID 16363 Rev 4 27/98 system. The forced VBAT standby mode can be terminated by any regular wake-up event. The root cause of the forced VBAT standby is indicated in the SPI status registers The forced VBAT standby mode is entered in case of: ● Multiple watchdog failures: forced sleep WD = 1 (15x watchdog failure) ● Multiple thermal shutdown 2: forced sleep TSD2/SHTV1 = 1 (7x TSD2) ● V1 short at turn-on: forced sleep TSD2/SHTV1 = 1 (V1 < V1fail for t > 4 ms) Figure 16. Example: exit fail safe mode from watchdog failure Table 6. Persisting fail safe conditions and exit modes Failure source Failure condition Diagnosis Exit from fail-safe mode µC (oscillator) 15 consecutive watchdog failures Fail-safe = 1 ForcedSleepWD = 1 Wake-up TRIG = 1 during LOWi read & clear SR3 V1 short at turn-on Fail-safe = 1 ForcedSleepTSD2/SHTV1 = 1 Read&clear SR3 after wake-up Temperature 7 times TSD2 Fail-safe = 1 TW = 1 TSD1 = 1 TSD2 = 1 ForcedSleepTSD2/SHTV1 = 1 Read&clear SR3 after wake-up |
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