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CMOS
Joined: 06 Jan 2004
Posts: 810
Helped: 39
Location: USA
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 12 Mar 2004 13:18 Difference between P89C51RD2 and AT89C51RD2 |
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| Can anyone tell me what is exact difference between Philips P89C51RD2 and Atmel AT89C51RD2? Or are they the same and replacable with one another?
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mgajo
Joined: 15 May 2001
Posts: 347
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12 Mar 2004 13:52 Re: Difference between P89C51RD2 and AT89C51RD2 |
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Hi
use AT89C51RD2 with 100000 r/w cycles
P89C51RD2 is only 1000 
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CMOS
Joined: 06 Jan 2004
Posts: 810
Helped: 39
Location: USA
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12 Mar 2004 15:51 Re: Difference between P89C51RD2 and AT89C51RD2 |
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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.
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Ajay
Joined: 29 Feb 2004
Posts: 31
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| 12 Mar 2004 17:53 |
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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
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12 Mar 2004 17:53 Ads |
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CMOS
Joined: 06 Jan 2004
Posts: 810
Helped: 39
Location: USA
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13 Mar 2004 15:31 Re: Difference between P89C51RD2 and AT89C51RD2 |
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| Thanks Ajay. One more doubt: Are the SFR's located at same addresses in both the chips?
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