a a embedded world problem !

[mount me <linladn at yahoo dot co dot in>]

Hell Experts,
Sorry... away from the topic,,,, but you embedded
guys should have come across the below problem.
So,...do help this chap...... !

I have a board with ATMEL 89c51 interfaced
with 1 MB data memory and 0.5 MB program Memory,
a keypad and lcd interface.
I am able to port and run a particular application 
built using KEIL successfully in the 89c51 controller 
and store the data got from the user into the flash. 
The software is perfect. I have many such boards
and it runs perfectly.

But, at times
the board/controller goes into a hanging condition
while getting the data from the user 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 in
which the board came to standstill the previous day.

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.
It hangs at certain times if the data is low
and at times if the data is high . 
I am Really confused .

Has anyone come across such problem ? 

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 ?Plz do help me. 

Xpecting ur reply,
karthik bala guru.T
linladn at yahoo dot co dot in
tkarthikbalaguru at yahoo dot co dot in

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