How to reset MM9Z1-638 device

[gumu]

Hello,

I tried to use PCRReset() to reset MCU, it didn't work.

I'd like to know how to reset MM9Z1-638 device except watchdog?

[gumu · Accepted solution]

reset funcion is normal after removing 470nf capacitor .

[gumu]

Hi @Q_man ,

There is a 470nf capacitor between RESET and GND. Does it impact action of PCR_CTL.HWR(M)?

RESET and RESET_A is connected together.

[Q_man]

The 470nF is required to avoid the analog chip watchdog to periodically reset the uC. It should only be use for FLASH programming and should NOT be present in the application or software testing.

 

 

[Q_man]

Hi,

using the PCR_CTL.HWR(M) should generate a Reset (RESET_A should be pulled low) if the D2D Interface is initialized.

What hardware do you use?

- are the RESET_A and RESET pins connected?

- is there anything else connected externally to the RESET?

- is the D2D interface setup correctly? E.g. can you read from the analog die (e.g. the PCR_SR)

Rgds

W.