P0.15 can reset CPU even WKUP-INT not set?

daweiy · ‎2006-02-21

Posted on February 22, 2006 at 05:59

daweiy · ‎2006-02-21

Posted on February 22, 2006 at 03:06

Hello everyone,

The problem I met is in STR710-EVAL board, without any XTI initialization and just running code to calculate something. If wakeup switch, sw11, pressed, the board being reset similar with pressing switch sw12.

So GPIO0.15 as wakeup pin or rtc alarm, will reset CPU if it is not in STOP or STANDBY mode?

Another question is after CPU enters STOP mode succeed, because code freezed, press sw11 and CPU will be wakeup sometimes to do rest code and sometimes just reset itself, anybody can explain what's wrong?

Thanks for read.

Dawei

anis · ‎2006-02-21

Posted on February 22, 2006 at 05:19

Hi Dawei,

To solve your problem, you need to remove capacitance C80, in fact when using this capacitance and when pressing the Wakeup button , there is a line perturbation detected by the reset supervisory circuit STM811 which generate a RESET.

STARM

;)

halim · ‎2006-02-21

Posted on February 22, 2006 at 05:59

Hi Dawei,

I 'm agree with STARM to solve this problem. and i send you the

STR71x refrence Design (see attached).

With best regards

Punto 8-)

________________

Attachments :

STR710_refdesign.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I1OB&d=%2Fa%2F0X0000000bmL%2FKbii1714bUAU5gYndY4HooM8t8cj2IRg1d9KBpHtE7c&asPdf=false