MSP430F6779A: Can PMM26 occur even setting the reset pin to NMI?

Hi,

I have another question.

when PMM26, does the reset pin can be reset to hold High?

Hi Tink 

reset pin is not used as reset pin from your initial setting code. this is not matched with PMM26.

Could you please comment your hardware setting? it is EVM430-F6779, target socket board or the customized board?

Thanks

Yes, the customized board.

Hi Xiaodong LI,

Can POR reset during writing SYSWHCTL make PMM26 occurs with timing below?

Thank you.

Hi Tink 

I think your question is on SVSMHCTL register.

from your source code, you have set to NMI function by SFRRPCR = SYSNMI | SYSNMIIES | SYSRSTRE

your reset pin rise time from 0 to 1.65V is 6mS. Could you please check if the rise time can be changed to ~2mS?

Thanks

Hi Xiaodong LI,

thank you for advice.

However, in the current situation I can't reproduce the problem in the lab (its symptoms looks like pmm26).

Even try increasing or decreasing the rise time of the reset pin.

Do you have any idea or other errata i should check for this symptoms?

"The device will stop code
execution and is continuously held in reset state. RST pin is no longer functional. The only
way to come out of the lock-up situation is a power cycle"