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L9663 数据表(PDF) 44 Page - STMicroelectronics |
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L9663 数据表(HTML) 44 Page - STMicroelectronics |
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44 / 104 page  Diagnosis L9663 44/104 DocID028693 Rev 1 4.4 PSIx reverse voltage monitoring The PSIx sensor supply lines are monitored to detect a short circuit to battery if the PSIx line is switched on. Basic features: Reverse voltage monitoring with respect to VAS (or VBH during sync pulse) voltage with filter time Readable via SPI Figure 23. Timing for PSIx reverse voltage detection In case of a detected failure, a failure bit STBx in SR2 register is set to '1' (latched and cleared upon reading via SPI). After reset, the failure bit is reset to '0' 4.5 VAS under/over voltage monitoring The VAS voltage is monitored for under voltage and over voltage. Basic features: Under voltage comparator with filter time Over voltage comparator with filter time Readable via SPI Figure 24. Timing for VAS under voltage detection |
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