Reset Problem

[hossam]

Posted on August 27, 2015 at 16:33

Hi

We are using STM32F302C , for reset we use reset monitor IC max809. our schematic is as attached picture. The problem is that  some boards don't have auto power reset and we have to press switch S2 in order to start the micro. Any recommendations to overcome this problem Regards Hossam Alzomor #reset

[Tesla DeLorean]

Posted on August 27, 2015 at 18:10

You need an MAX803, the Open Drain version, with a pull-up (10K)

The MAX809 uses a push-pull driver which is incompatible with the bidirectional reset used by ARM processors.

http://datasheets.maximintegrated.com/en/ds/MAX803-MAX810Z.pdf