ZHCSQ68A May 2022 – December 2022 TLIN1431-Q1
PRODUCTION DATA
The TLIN1431x-Q1 has an integrated watchdog function. This can be programmed by pin control or SPI communication control based upon the state of the PIN or nCS pin at power up. The device defaults to windows based watchdog at power up. When entering normal and fast modes, the programmed watchdog timer starts based upon the pin configuration for pin mode or register configuration in SPI control mode. When entering standby mode from restart mode, there is a nRST transition from low to high. This transition starts the tINITWD timer. A WD trigger input must take place prior to this initial long window times out. If WD is disabled in standby mode the same long window is implemented in normal mode. The LIMP pin provides a limp home capability when connected to external circuitry. When in sleep mode, the limp pin is off. When the error counter reaches the watchdog trigger event level, the LIMP pin turns on connecting VSUP to the pin as described in the LIMP pin section and the device transitions to restart mode at which time the nRST pin will be pulled low.