can someone tell me what arm chip is pin compatible with my AT80C2051.
What, exactly, do you mean by "compatible" here??
The ARM and 8051 architectures are pretty much incompatible!
Do you mean:
* An ARM that can interface to an AT80C2051 ?
* An ARM that can replace an AT80C2051 ?
* or what??
got the best answer. found a supplier more AT80C2051 at very good price. no redesign. no trouble. quick. simple.
Well done. But make sure it isn't an AT89C4051 or AT89C2051 with the 9 made to look like an 0. The AT80C2051 is very rare.
found a supplier more AT80C2051 at very good (sic) price
Maybe a good short-term answer - provided these are genuine, full-spec, new & unused parts.
But, in the long-term, you just postpone the problem.
And, if the provenance of these devices is in any way less than certain, your problems may be just about to begin...