STM32 WWDG timeout formula

Posted on May 07, 2008 at 02:35

This topic has been closed for replies.

Associate III

Posted on May 17, 2011 at 12:34

The value given for the WWDG timeout in the RM0008 reference manual is

Quote:

Twwdg = TPCLK1 x 4096 x 2^WDGTB x (T[5:0] + 1)

It seems to me it would be better to describe the timeout as a time range, due to the comment elsewhere in RM0008 about the timeout value:

Quote:

The timing varies between a minimum and a maximum value due to the unknown status of the prescaler when writing to the WWDG_CR register

It would seem to me that the time range below is a more accurate way of describing the WWDG timeout value.

Twwdg = TPCLK1 x 4096 x 2^WDGTB x (T[5:0])

to

Twwdg = TPCLK1 x 4096 x 2^WDGTB x (T[5:0] + 1)

Can ST confirm this is the case?

Thanks

Sign up