Hello Experts,

I have a board with ATMEL 89c51 interfaced
with 1 MB data memory and 0.5 MB Code Memory.
I am able to run a particular application
built using KEIL successfully.
The software is perfect. I have many such boards
and it runs perfectly.

But, at times
the board/controller goes into a hanging condition
and the data in the flash memory is lost.
Using our another serial port software i am able to
get the data stored just before the controller went
into the hanging condition from the flash memory in
the board .

The same board works fine the other day
with the same software in the same condition that
it went into hanging condition.

I am really confused . I am unable to find or predict
the moment it will go into hanging condition . I
am unable to find the moment i will lose my data.

where is the problem ? y is it unpredictable like windows ?? Should the problem be with
the software or with the hardware ? but most
of the times the software works and there is
no such hanging problem .
But why should it hang at certain times ???

How to avoid it ? I am into scratching my
head for the past "1 and a half week" .
give me a break through !

Xpecting ur response,
karthik bala guru.T