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35FS6500 Datasheet(PDF) 39 Page - NXP Semiconductors |
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35FS6500 Datasheet(HTML) 39 Page - NXP Semiconductors |
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39 / 139 page  NXP Semiconductors 35FS4500-35FS6500-ASILB Grade 0 safety power system basis chip with CAN FD transceiver aaa-037749 Watchdog Error Counter WD_CNT_ERR = 6 Watchdog Error Counter WD_CNT_ERR = 4 Watchdog Error Counter WD_CNT_ERR = 2 0 1 2 0 1 2 3 4 WD refresh NOK WD refresh OK WD refresh OK WD refresh OK WD refresh OK WD refresh OK WD refresh OK WD refresh OK WD refresh OK WD refresh NOK WD refresh NOK WD refresh NOK 0 1 2 3 4 5 6 WD refresh NOK WD refresh NOK WD refresh NOK WD refresh NOK WD refresh NOK WD refresh NOK WD refresh NOK Figure 16. Watchdog error counter configuration (INIT_WD_CNT register, bits WD_CNT_ERR_1:0) 12.5.2.6 Watchdog refresh counter The watchdog refresh counter is used to decrement the fault error counter. Each time the watchdog is properly refreshed, the watchdog refresh counter is incremented by ’1’. Each time the watchdog refresh counter reaches ’6’ and if next WD refresh is also good, the fault error counter is decremented by ’1’ (case with WD_CNT_RFR_1:0 configured at 6). Whatever the position the watchdog refresh counter is in, each time there is a wrong refresh watchdog, the watchdog refresh counter is reset to ’0’. To allow flexibility in the application, the maximum value of this watchdog refresh counter is configurable in the INIT_WD_CNT register, but only when device is in INIT_FS mode. 35FS4500-35FS6500-ASILB All information provided in this document is subject to legal disclaimers. © 2024 NXP B.V. All rights reserved. Product data sheet Rev. 3 — 5 August 2024 Document feedback 39 / 139 |
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