IWDG enable before setting?

fangelin · ‎2009-10-01

Posted on October 02, 2009 at 08:34

fangelin · ‎2011-05-17

Posted on May 17, 2011 at 15:04

It seems to me that you can't write access both PR and RLR register of IWDG before enabling it...I.e. you must first load 0xCC (ENABLE_KEY) in KR, then 0x55 (ACCESS_KEY) again in KR, and finally write the prescaler and reload values.

In fact you must enable the WDG before configure it!

mozra27 · ‎2011-05-17

Posted on May 17, 2011 at 15:04

Exactly...