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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L99ASC03G датащи(PDF) 29 Page - STMicroelectronics |
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L99ASC03G датащи(HTML) 29 Page - STMicroelectronics |
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29 / 70 page  DocID029080 Rev 2 29/70 L99ASC03G Device description 69 Figure 13. Persistent watchdog failure (VBAT Standby Mode entered after 15 watchdog faults) Figure 14. Persistent TSD2 failure (VBAT Standby Mode entered after 7 VDD turn-offs) 2.19 Serial peripheral interface (ST SPI standard) A 16-bit ST SPI is used for bi-directional communication with an external microcontroller. Through SPI it is possible to trigger the watchdog, control the operating modes, adjust some device parameters and read out diagnostic information of several device modules. During standby modes, the SPI is generally deactivated. The SPI has to be driven in the following mode: VDD Short circuit at VDD turn-on VDDFAIL = 1 Read & Clear VDDFAIL Temperature Tj>TSD2 for 7 times (VDDR = 111) TSD2 = 1 Read & Clear TSD2 Table 6. Forced VBAT standby mode (continued) Source Cause Diagnosis Clear error flag VDD Forced VBAT Standby tTSD 1 t Counter 2 3 4 5 6 7 |
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