Stop mode and voltage regulator off

olivier239955_stm1_stmicro · ‎2007-11-26

Posted on November 27, 2007 at 03:54

olivier239955_stm1_stmicro · ‎2011-05-17

Posted on May 17, 2011 at 12:18

Hi all,

I use the STM32F103VB.

I want to use the stop mode with regulator OFF (LPDS bit), but after more than 1 wake-up, the micro reset (POR).

When the voltage regulator is ON the application works fine.

Any ideas of what I miss ?

16-32micros · ‎2011-05-17

Posted on May 17, 2011 at 12:18

Dear olivier,

Could you please share with us us more details about your environement

( in terms of Software, Hardware and your configuration of wake-up lines),

What do you mean by ''after more than 1 wake-up'' ? Do you cheked that The EXTI Pending bits are cleared before re-entering again the STOP Mode?

In your STOP mode : What is your measured Current comsumption ( Only the STM32). Thank you to provide me this data. If your software confidential you can send it / contact our support services and they can respond you shortly.

Regards, STOne-32

16-32micros · ‎2011-05-17

Posted on May 17, 2011 at 12:18

Dear Olivier,

Two more questions :

1) Could you please tell me if you are using an early silicon Enginnering sample RevA ? (It is printed on the Package just after STM32F103VBT6 )

If it is the case this kind of phenomenom is already known and should not happen on production silicon (revB and revZ).

2) Could you please inform me what do you mean by POR reset? Is there a new POR reset flag set after the problem occurs? If yes the regulator itself may not be the root cause but there might be a VDD voltage drop in the application in some specific cases.

Thank you for your feedbacks on this. Regards STOne-32

olivier239955_stm1_stmicro · ‎2011-05-17