Sorry for OT, but I in big trouble!
From time to time my devices with above mentioned processors corrupt content of internal program memory. Does anyone see this behavior od 80C51ED2?
Dozsa Gyoergy
P.S. Keil C51 user since '91
that's why I'm asking Erik why replacing the supposed RC reset circuit with a reset supervisor would fix this problem with the AT89C51ED2
already answered: (which do not hold the uC in reset during power down)
Even the magnificent Jack Sprat can not tell what a uC will do when outside the Vcc limits and not in reset.
These problems are always reported as "during power up" but they actually happen during power down.
Erik
Erik, It this a problem specific to 51s (as suggested above) due to a design flaw?
It this a problem specific to 51s (as suggested above) due to a design flaw? no, it applies to all flash based micros.
the 'design flaw' is not realizing the situation at power down by the developer, not the chipmaker.
You keep repeating this without exlaining why it would matter.
I'm sorry to disappoint you, but I can.