Celso Monteiro

Unused analog inputs - failure mode

Discussion created by Celso Monteiro on Sep 22, 2008
Latest reply on Sep 23, 2008 by Celso Monteiro
Hi all,

I am involved in a new QG8 project and these project has different targets with different resource allocation. So far I could manage the software to be a single one.

In one of these targets I don't use an analog input and my design checklist told me to program this pin as output so it wouldn't float.

The problem is that it turns out to be two softwares, even at conditional compilation, but two S19 files.

My question is: if I let this analog input floating, what could be the failure mode? If it is digital, it could lead to both fets conducting and excessive curent consumption, but the analog input could cause any trouble?

Any help will be appreciated,