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L9908 Datasheet(PDF) 133 Page - STMicroelectronics |
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L9908 Datasheet(HTML) 133 Page - STMicroelectronics |
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133 / 153 page  Figure 87. Watchdog command order sequence In case of a wrong WDT data command (command different from the expected sequence order), the watchdog word fail counter is incremented by 1. With the next valid watchdog data command the fail counter is decreased by 1. If the failure counter reaches the failure limit defined in the SPI register WDT_FAIL_COUNT_CFG the watchdog fail flag WDT_DATA_fail is set and L9908 is sent to safe state. The fail counter limit can be programmed by the following SPI bit set: Table 149. Watchdog configuration table for WDT data fail counter WDT_FAIL_COUNT_CFG1 WDT_FAIL_COUNT_CFG0 Description 0 0 1 0 1 1 1 0 2 1 1 3 (Default) The information about the number of encountered WDT data failures is stored in the dedicated SPI register WDT_FAIL_COUNT_STATUS. L9908 Window Watchdog Timer (WTD) DS13546 - Rev 3 page 133/153 |
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