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IWDG enable before setting?

fangelin
Associate II
Posted on October 02, 2009 at 08:34

IWDG enable before setting?

2 REPLIES 2
fangelin
Associate II
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
Associate II
Posted on May 17, 2011 at 15:04

Exactly...