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I am working on a fingerprint security project, based on what I've read so far, I decided to go for AT89S52 as my microcontroller, but I got stuck when I decided to simulate my circuit on Proteus 7.8.

The software offers me AT89C52, but i didn't see AT89S52. So, I am stuck between using AT89C52 but am scared if is going to affect my work, since I don't know if they are the same.

I thought about using another electronics schematic software, I am willing to change but don't know what else to use besides Proteus and the Keil compiler I'm using now. What to do?

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  • \$\begingroup\$ I don't use AVRs, but from what I found here the difference is that the 89C52 isn't in-system reprogrammable (i.e. you need a programmer) and the 89S52 is. \$\endgroup\$ – Renan Aug 30 '13 at 14:10
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    \$\begingroup\$ They are not AVRs! \$\endgroup\$ – Leon Heller Aug 30 '13 at 14:53
  • \$\begingroup\$ Indeed, I noticed this but only after it was too late to edit my comment. \$\endgroup\$ – Renan Aug 30 '13 at 14:58
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For the purposes of Proteus simulation, the AT89S62 and the AT89C52 are the same.

Presumably you will be simulating run-time functionality, rather than electrical behavior at programming time.

In any case, Proteus cannot simulate the actual in-circuit programming of its microcontroller models, so you're good.

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  • \$\begingroup\$ okay i try using at89c52 as recommended here and see if its actually in line with my expectations \$\endgroup\$ – Green Onyeji Aug 30 '13 at 15:49
  • \$\begingroup\$ what about my source code does it have any effect taking the source code of at89c52 to at89s52 and vice versa? \$\endgroup\$ – Green Onyeji Aug 30 '13 at 15:59
  • \$\begingroup\$ @GreenOnyeji If you refer to the datasheets, you'll see for yourself: The two microcontrollers are code-compatible - but you need to read the datasheet for any microcontroller you use, anyway. \$\endgroup\$ – Anindo Ghosh Aug 30 '13 at 16:01

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