wuchy143
Member
Hi All,
I was wondering what the design considerations typically are for a microcontroller in regards to a supervisor IC. I'm using an 8051(Atmels 89S52) in a 5V system. I have noticed that it is possible for the micro to go crazy/fail with power glitches...noise and other disturbances to the power rails when using the standard RC for the POR.
Depending on the system I don't want to pick a voltage threshold too close to the power rails so when someone hooks up a long cable or for whatever reason voltage goes a few tenth's of a volt below 5 I don't want to have issues.(false resetting) On the flip side if I pick too low of a threshold and when voltage browns out the micro is still allowed to go crazy....any thoughts?
Thanks!
I was wondering what the design considerations typically are for a microcontroller in regards to a supervisor IC. I'm using an 8051(Atmels 89S52) in a 5V system. I have noticed that it is possible for the micro to go crazy/fail with power glitches...noise and other disturbances to the power rails when using the standard RC for the POR.
Depending on the system I don't want to pick a voltage threshold too close to the power rails so when someone hooks up a long cable or for whatever reason voltage goes a few tenth's of a volt below 5 I don't want to have issues.(false resetting) On the flip side if I pick too low of a threshold and when voltage browns out the micro is still allowed to go crazy....any thoughts?
Thanks!