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8051 with external memory

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nilanka

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Hi,
I want to save some data in external memory when each time microcontroller (8051) reset.
First time it is not problem but at second time my previous data is superimposed by new data due to saving same location.
How can i solve this case?
I hope to use EEPROM


plz reply clear idea as soon as possible........
 
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You are using 8051 with external RAM memory ?
Wich 51 manufaturer ? Wich P/N ?

Some options allow saving internal data memory, not shared by program.
The LINKer ( part of compiler ) defines each area is used by what.
Check it.

+++
 

8051 with external memory interfacing

Hi
I'm using an NV-RAM external with 8051. I want to know after I reset the 8051 via RST pin what happen the existed data in the NV-RAM
plz reply me very soon..............
 

Re: 8051 with external memory interfacing

u will lose all data when u turn off the supply
 

Re: 8051 with external memory interfacing

nilanka,

Check compiler linker directives.

+++
 

Re: 8051 with external memory interfacing

I'm using an NV-RAM external with 8051. I want to know after I reset the 8051 via RST pin what happen the existed data in the NV-RAM
Click to expand...

The data should remain unchanged, unless there is something in the beginning of your code that clears all RAM locations ..
Go through the code and check it out ..

IanP
:wink:
 

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