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I am using externel memory eprom for data storage , we couldnt fetch the data from the externel memory. So it seems the problem is with the speed of executon. So please help me configure WAIT STATES.
"we couldnt fetch the data from the externel memory. So it seems the problem is with the speed of executon"
Why does that seem so?
What have you done to rule-out other possibilies - such as coding errors, hardware design flaws, and/or hardware faults?
"please help me configure WAIT STATES"
As already noted, the standard 8051 architecture does not have configrable wait states; therefore, if your specific chip does have it, the way to configure them will also be specific to that chip. so you're just going to have to study the Datasheet for the specific chip.
... you provide a link to the datasheet (at the manufacturers website, not some datasheet collection site) for both your uC and your memory. Also, you need to post your clock speed. I take that you do have a low address latch (which chip).
Erik