Allan,
Thank you for your help!
I know that the problem comes from our design...
I was just wondering if it has been shared but someone else, someone who has already found the solution ;-)
About EPE, on some of our PCBs EPEE is directly connected to 3.3V, and VPP to 5V (with a Schottky from 3.3V)...
Jean-Christophe
________________________________
De :
MPC500@... [mailto:
MPC500@...] De la part de Dobbin Allan-R11834
Envoyé : jeudi 2 juillet 2009 17:30
À :
MPC500@...
Objet : RE: [MPC500] MPC555 Flash programming
Flash programming is tested over temperature in the factory. Could it be related to weak pull-up on one of the prog enable pins like EPEE?
- Allan
________________________________
From:
MPC500@... <mailto:MPC500%40yahoogroups.com> on behalf of Jean-Christophe MATHAE
Sent: Thu 7/2/2009 12:58 AM
To:
MPC500@... <mailto:MPC500%40yahoogroups.com>
Subject: [MPC500] MPC555 Flash programming
Hello,
We have for many years a problem when programmming the MPC555 internal Flash module : it seems to be quiet sensitive to ambient temperature...
Not all our boards are sensitive alike, but all are plagued by this problem. Some would require heating the chip, some would require cooling it.
We are using Macraigor's Flash Programmer software with a Wiggler or Raven.
As anyone also encoutered this type of problem?
As anyone an idea what the cause of the problem is, and how to solve it?
Thank you.
Best regards.
Jean-Christophe MATHAE
CIRTEM
http://www.cirtem.com <
http://www.cirtem.com> <
http://www.cirtem.com/ <
http://www.cirtem.com/> >
bâtiment Pointe Bleue
20, voie l'Occitane
BP661
31319 LABEGE cedex
France
