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MFS2401AVBA0ES Datasheet(PDF) 64 Page - NXP Semiconductors |
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MFS2401AVBA0ES Datasheet(HTML) 64 Page - NXP Semiconductors |
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64 / 151 page  NXP Semiconductors FS2400 Fail-safe system basis chip with SMPS and LDO, CAN FD transceiver aaa-046858 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 WD Refresh NOT OK / WD_OFF WD refresh NOT OK / WD_OFF 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_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 NOT OK / WD_OFF WD refresh OK 0 1 WD_RFR_LIMIT = 11 Figure 41. 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 or LIMP0 is configurable with the WD_RSTB/LIMP0_IMPACT bits during the INIT phase. If it happens in LPON mode, the device also wakes up. WD_RSTB/LIMP0_IMPACT WD impact on RSTB/LIMP0 0 No effect on the pin 1 (default) The pin RSTB/LIMP0 is asserted Reset condition POR Table 31. Watchdog error impact configuration 19.2.5 Watchdog electrical characteristics TA = –40 °C to 115 °C, unless otherwise specified. VSUP = 5.5 V to 40 V, unless otherwise specified. All voltages referenced to ground. Symbol Parameter Min Typ Max Unit Watchdog WDPER_ACC Watchdog period accuracy -10 - 10 % WDDUTY_CYCLE Window watchdog duty cycle 47.5 50 52.5 % Table 32. Watchdog electrical characteristics 19.3 Voltage supervisor The voltage supervisor is in charge of overvoltage and undervoltage monitoring of all the supply generated by the FS24, Vx (x = 1, 3), and of VMON_EXT input pin. When an overvoltage occurs on an FS24 regulator, the regulator is switched off until the fault is removed. The overvoltage monitoring is activated before the power-up slots start. The undervoltage monitoring is activated once the device is in Normal mode. UV/OV flags are then reported accordingly. VMON0 monitoring on VMON_EXT pin is enabled by OTP (V0MON_EN_OTP). FS2400 All information provided in this document is subject to legal disclaimers. © 2024 NXP B.V. All rights reserved. Product data sheet Rev. 4 — 23 October 2024 Document feedback 64 / 151 |
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