Difference between P89C51RD2 and AT89C51RD2

[CMOS]

Can anyone tell me what is exact difference between Philips P89C51RD2 and Atmel AT89C51RD2? Or are they the same and replacable with one another?

 

[mgajo]

Hi
use AT89C51RD2 with 100000 r/w cycles
P89C51RD2 is only 1000

 

[CMOS]

Philips has 10,000 minimum erase/program cycles for each byte, not 1000. So that is not much difference because usually your development gets over withing max. 3000-5000 erase/writes.

I meant difference in terms of SFRs and their addresses.

 

[Ajay]

I think the MAIN difference is the Atmel part can erase one byte at a time in the flash thus making it very powerful. In case of Philips, you must erase an entire sector.

So, you can replace a Philips part with Atmel but NOT vice versa.

Ajay

 

[CMOS]

Thanks Ajay. One more doubt: Are the SFR's located at same addresses in both the chips?