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how to build 8051 programmer

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Keklja

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Hi all
I have Atmel 89c51RB2-UM and AT89C51-24PI uC. Is there a way to build programmer for them? I dont wont to buy programmer just for these 3 uC because there are old.
 

For both of them?
Do you have a schematics?
 

I think u can follow this circuit.
 

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    Fenderdapd

    Fenderdapd

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I think I read somewhere you can not program AT89C51 that way. Anyway I will try and write here result. Thx
 

In my opinion it will support all 8051 microcontrollers..lets check
 

In my opinion it will support all 8051 microcontrollers..lets check
Click to expand...
No, only newer xxRB2 and xxRD2 which have flash self-write capability and a Bootloader-ROM. Standard 89C51 needs a parallel programmer.

In case of doubt, just review the datasheet.
 
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    K

    Keklja

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Ok. So with that design on previous post I can program my AT89C51RB2, correct? Now for my other uC. I find this programmer o ebay. Here is the link: **broken link removed**
I can programmer with that my standard AT89C51?
 

Keklja said:
Ok. So with that design on previous post I can program my AT89C51RB2, correct? Now for my other uC. I find this programmer o ebay. Here is the link: **broken link removed**
I can programmer with that my standard AT89C51?
Click to expand...

No, You cant program at89c51.
 
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    Keklja

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Why not? It is not parallel programer?
 

Review the schematic. Do you see any programming hardware (high voltage supply, pin drivers, controller)?
 

Im new in this area. I dont see controller. High voltage supply, pin drivers for those I'm not sure what they do but i dont see high voltage supply. But design on a picture few post earlier also doesnt have these but can be programed because it is At89C51RB2 and have bootloader?
 

So Im gonna try that design that Kick posted. In pictures below are components that I need. Only I dont have 470ohm resistor that is connected to the reset button. What is my alternative? I will google that. I have serial connector and max232 connected together (bought that long time ago on ebay) but I dont think it will work, so I backup. Tomorrow I try to connect that and tell you result. In meantime look and pictures and tell me do I need something else.
 

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