FS23 datasheet(201/230 Pages) NXP

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NXP Semiconductors

FS23

Safety system basis chip (SBC) with power management, CAN FD and LIN transceivers

24.20 OTP_FS_SYS_CFG

Bit

Write

Read

Reserved

INIT_CRC_

DIS_OTP

FS_LPOFF_

OTP

FS_DUR_

CFG_OTP

WD_INF_ OTP

RSTB8S_

DIS_OTP

FIRST_FAULT_

EN_OTP

Reset

Table 231. OTP_FS_SYS_CFG register bit allocation

Bit

Symbol

Description

Configure the first fault to send the device in Fail-safe mode

0 Do not go to FS at first fault

1 Go to FS at first fault

FIRST_FAULT_EN_OTP

Reset on power-on reset

Disable the RSTB 8 s timer

0 RSTB 8 s timer is enabled

1 RSTB 8 s timer is disabled

RSTB8S_DIS_OTP

Reset on power-on reset

Set the watchdog period as infinite

0 Watchdog period is configurable by SPI/I2C

1 Watchdog period is infinite

WD_INF_OTP

Reset on power-on reset

Configure FS state duration

0 FS state duration is 100 ms

1 FS state duration is 4 s

FS_DUR_CFG_OTP

Reset on power-on reset

Configure FS state exit

0 Automatic restart after FS state

1 Go to LPOFF after FS state

FS_LPOFF_OTP

Reset on power-on reset

Disable the INIT registers CRC protection

0 CRC is enabled

1 CRC is disabled

INIT_CRC_DIS_OTP

Reset on power-on reset

Table 232. OTP_FS_SYS_CFG register bit description

FS23

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Product data sheet

Rev. 7.0 — 16 October 2024

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