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MFS2301BMBACEP Datasheet(PDF) 81 Page - NXP Semiconductors |
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MFS2301BMBACEP Datasheet(HTML) 81 Page - NXP Semiconductors |
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81 / 230 page  NXP Semiconductors FS23 Safety system basis chip (SBC) with power management, CAN FD and LIN transceivers WD refresh OK WD refresh OK WD refresh OK WD refresh OK WD refresh OK 0 1 2 3 4 5 6 WD refresh OK aaa-051467 WD Refresh NOT OK / WD_OFF WD refresh NOT OK / WD_OFF / WD refresh OK WD refresh NOT OK / WD_OFF / WD refresh OK WD refresh NOT OK / WD_OFF / WD refresh OK WD refresh OK WD refresh OK WD refresh OK WD refresh OK 0 1 2 3 4 WD refresh OK WD refresh OK 0 1 2 WD Refresh NOT OK / WD_OFF WD Refresh NOT OK / WD_OFF WD Refresh NOT OK / WD_OFF WD_RFR_LIMIT = 10 WD_RFR_LIMIT = 01 WD refresh NOT OK / WD_OFF / WD refresh OK WD refresh NOT OK / WD_OFF WD_RFR_LIMIT = 00 WD refresh NOT OK / WD_OFF WD refresh NOT OK / WD_OFF WD refresh OK 0 1 WD_RFR_LIMIT = 11 Figure 46. Watchdog refresh counter configurations 19.2.4 Watchdog error impact When the watchdog error counter reaches its maximum value, in Normal mode or in LPON mode, the fail-safe reaction on RSTB, FS0B, or LIMP0 is configurable with the WD_RSTB/FS0B/LIMP0_IMPACT bits during the INIT phase. If it happens in LPON mode, the device also wakes up. WD_RSTB/FS0B/LIMP0_IMPACT WD impact on RSTB/FS0B/LIMP0 0 No effect on the pin 1 (default) The pin RSTB/FS0B/LIMP0 is asserted Reset condition POR Table 39. Watchdog error impact configuration 19.2.5 MCU fault recovery strategy The fault recovery strategy feature is enabled by SPI/I2C using WDW_REC_EN bit. This function extends the watchdog window to allow the MCU to perform a fault recovery strategy. The goal is to not reset the MCU while it is trying to recover the application after a failure event. When a fault is triggered by the MCU via its FCCU pins, the FS0B and LIMP0 pins are asserted by the device depending on the FCCU error impact configuration. The RSTB pin is not asserted to keep the MCU availability and the watchdog window duration becomes automatically an open window (no more duty cycle). This open window duration is configurable with the WDW_RECOVERY[3:0] bits. FS23 All information provided in this document is subject to legal disclaimers. © 2024 NXP B.V. All rights reserved. Product data sheet Rev. 7.0 — 16 October 2024 Document feedback 81 / 230 |
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