AT89S52 and ISP Programming

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kabaza

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The circuit has to be built exactly as it is on the schematic diagram ( file: SCHEMATIC.pdf ).
As you can see, the microcontroller will be connected to Vcc via transistor Q1 ...
It will happen automatically, when the software is running ...

:wink:
IanP
 
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    kabaza

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transistor bc557 == the voltage regulator 7805?

---------- Post added at 14:39 ---------- Previous post was at 14:05 ----------

Also all I got is crystal 11.059 MHZ is that ok?
 
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1) the whole circuit should have regulated 5V, so using 7805 should be OK.
You still though need Q1 as the Vcc switch ..

2)11MHz clockl will be to fast; these programmers use 4MHz crystals ..

:wink:
IanP
 

IanP said:
1) the whole circuit should have regulated 5V, so using 7805 should be OK.
You still though need Q1 as the Vcc switch ..

2)11MHz clockl will be to fast; these programmers use 4MHz crystals ..

:wink:
IanP
Click to expand...
Thnx for your help but I setup the circuit as shown above. But when I try to erase/program at89s52 I get this screen

use follow connection with the avr isp.

any help?=/
Thanx
 

Try reducing the programming speed.
 

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