Skip to main content
Mlokesh
Visitor II
January 23, 2020
Question

STM8AL3189TCX NRST pin is asserted what happens to MCU output

Hello All,

we are using STM8AL3189TCX MCU in our design to control the system.

A WDT signal "MCU_NRST" is connected to NRST(PIN-2, NRST/PA1) pin in microcontroller with a Pull up to 3V3.

What will happen to MCU IC when the below reset condition occur: 

Condition:- If WDI pulse from HOST MCU fails this condition (Lower Boundary (tWDLmin) = 19.1ms-25.6ms & Upper Boundery (tWDUmax) = 46.8-63.3ms)

HW Action:- Supervisor will asserted low to reset, HOST MCU to turn off the system

Is the hardware action mentioned is correct?

Watch dog Part#- TPS3850H33QDRCRQ1

    This topic has been closed for replies.