hi, i'm new to microcontroller program . i have 89c51 controller max 232 ic, but to program i need athor programmer, is any possiblety to built my own programmer. please help me,
Oh, and if you google "atmel isp cable" the second result is the document you wanted from the atmel site.
www.atmel.com/.../doc3310.pdf
There seems to have once been a description of this cable, i.e. how it was connected. The related link is just the pinout of the ISP side - not the corresponding parallel port pins.
There are links to be found on the net, but the document seems to have been pulled from the Atmel site.
I did contact Atmel support for the nordic countries last year about it, since I then was in very big need of a cable in a hurry. They could not produce the document or a supplier in Sweden. But their suggested workaround was to invert the reset signal and use a AVR SDK500 kit.
If I need to program more AT89S chips, I should probably get a AT89ISP cable, since it is a bit more compact than the big SDK500 board. On the other hand, the machine I'm writing this on may probably be the last machine I'll have with a parallel port.