topic Re: S12g96 cop(Watch dog )issue in S12 / MagniV Microcontrollers

S12g96 cop(Watch dog )issue

玉敏111田 — Wed, 04 Dec 2019 08:35:58 GMT

boot's cop is disable,app's wd is enable.

Question1.when flash the bootwithapp to mcu ，but debug found that the cop counld not wrok,Why?

Question2. when the cop's clock was ACLK,how to disable the cop ?

Re: S12g96 cop(Watch dog )issue

RadekS — Thu, 05 Dec 2019 09:57:04 GMT

Hi,

The COP is driven by CPMUCOP register.

In special mode, you may write CPMUCOP register without restriction. Any write will restart COP timeout period.

In normal mode, you may write CPMUCOP register just once. If bootloader writes CR[2:0] as “000”, the application cannot change it without MCU restart.

Please check the complete CPMUCOP write conditions in RM.

I hope it helps you.

Have a great day,
Radek

Re: S12g96 cop(Watch dog )issue

玉敏111田 — Thu, 05 Dec 2019 10:58:52 GMT

Thanks .I have read the data sheet .And when I debug the EntryPoint Function with the breakpoint ,I found that WRTMASK was 0 rather than 1!