MSPM0L1305: What if reset (NRST) pin is disabled?

Wayne Huang

Genius 15415 points

Part Number: MSPM0L1305

Tool/software:

Hi champs,

I am asking this for our customer.

The user wants to disable the reset (NRST) pin as follows.

Questions:

1. If the user disables reset pin, will BOR (brown-out reset) function be affected or even compromised?

2. Is there any major side effect if the user disables reset pin?

6 months ago

0 Pengfei Xie 6 months ago

TI__Intellectual 2255 points

Hi Wayne,

1. If disable NRST pin, the BOR can not be triggered by NRST pin low level any more. But BOR function can be triggered by other cases (VDD drops and SHUTDOWN mode exit).

2. The NRST SW in launchpad can not be used, and it may be harder to debug.

Regards,

Pengfei

0 Wayne Huang 6 months ago in reply to Pengfei Xie

TI__Genius 15415 points

Hi Pengfei,

1. That is, BOR function triggered by VDD drop still works normally even when NRST pin is disabled. Is my understanding correct?

+1 Pengfei Xie 6 months ago in reply to Wayne Huang

TI__Intellectual 2255 points

Yes, the VDD drop down below BOR0- will still reset the MCU

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MSPM0L1305: What if reset (NRST) pin is disabled?