Hi Team,
1. The watchdog of the TCAN1146-Q1 uses the LIMP pin to output the watchdog abnormal state, so when the watchdog wants to reset the MCU, the LIMP outputs a high logic signal, right?
2. Can LIMP control the Reset pin of the MCU via an NPN FET?
Regards,
Ivy
Hi Ivy,
1. Yes. INH pin can be configured as LIMP function on TCAN1144/1146, if the Watchdog times out, the device by default turns on the LIMP home function.
2. Yes, it can. A more conventional watchdog reset is configuring the watchdog trigger action to pulse INH output (13h[1:0] = 00b). Doing so would disable any voltage regulators that are enabled by this signal, forcing a power cycle of the system.
Regards,
Sean
