Basic functionality

AN3271

6/29

Doc ID 17933 Rev 2

1.4

Reset after long push (optional)

Holding the PB and SR buttons simultaneously asserts a reset regardless of processor

response - i.e. if the application is not responding to an interrupt (e.g. program freezes) (see

Figure 3). The time needed for both buttons to be held is adjustable by an external capacitor

Figure 3.

Simplified timing sequence for option “reset asserted after long push”

1.