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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9924L датащи(PDF) 64 Page - STMicroelectronics |
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L9924L датащи(HTML) 64 Page - STMicroelectronics |
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64 / 84 page  SPI interface L9924L 64/84 DocID028840 Rev 3 Warning: if the relevant wake-up source are disabled (WKUP_SOURCE_IGNIT_DISABLE, WKUP_SOURCE_LHC_DISABLE and WKUP_SOURCE_L_DISABLE bits of register 0x04) these bits are cleared independently of the effective status of the pins 7 WDG_FAIL_SWT_OFF_PWR_STG 0 (RC) If the watchdog has been configured to switch the power off instead to reset the microcontroller, this bit notifies that the power stage has been switched off after a watchdog failure occurrence (see register 0x02) This bit must be cleared with a read and clear operation to enable the field excitation 6 WDG_FAIL_RESET_UP 0 (RC) When 1 notifies that the system reset has been caused by the SmartPower watchdog 5 WKUP_BY_L 0 (RO) Wakeup source Notification These bits contain the latched status of the relevant input pin after a system wake-up. If more than one bit is set the wake-up source signal cannot be unambiguously identified 4 WKUP_BY_LHC 0 (RO) - 3 WKUP_BY_IGNIT 2 WKUP_BY_PH 1 WKUP_BY_RC(2) 0 WKUP_BY_LIN(2) 1. These bits report the current status of the relevant input without any latch logic. 2. If the wakeup is triggered by a protocol line edge it is possible that the microcontroller loses the first data frame because of the time it takes to wakeup and to initialize the whole system; the protocol transmitter node must take into account this eventuality. Table 44. WAKEUP SOURCE register [0x11] (continued) Bit Register name Reset value Description |
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