William Whyte

Default output levels of I/O pins at reset - MCS9S12E256

Discussion created by William Whyte on Jul 8, 2008
Latest reply on Jul 8, 2008 by William Whyte
I have noticed while debugging a different issue that the output level of I/O pins is different when the micro comes out of reset. The micro I am using is a MCS9S12E256.
Out of reset I noticed Port M pin 3 goes low while pins 4, 5 and 6 went high. These pins are being used as general I/O pins so they all have the identical circuitry attached to them and therefore I was expected the output level on them to be the same when coming out of reset.
The only explanation I could come up with was because they have different secondary functionality. Can any one confirm if that is expected.
Added p/n to subject.

Message Edited by NLFSJ on 2008-07-08 02:32 PM