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hi...friends please help me about the circuit diagram of at89c51 microcontroller programmer. i want to program 89c51 by usb cable by laptop.but dont send me firmware type circuit,that i have already seen on internet.so please send ckt diagram of it &also send if it possible pcb layout of it..so plz as soon as possible send this on my below mail address with ur email address, so further queris i can ask to u.i will wait for ur valuable response on -- hardik.patel20062006@gmail.com
1) you do not know that the at89c51 is a C51 device 2) to decode the USB signals will be a 6 month task 3) the at89c51 is a discontinied chip 4) the posts "I have made this programmer I found on the internet, it says it works, why does mine not work" are legio and almost all ended "OK I'll buy one" or "OK I'll buy an ISP chip" 5) the cost of such a programmer, should you foolishly decide to go on, will be, at least, 10 times the cost of an ISP chip like the ...RD2 for which you do not need a 'prorammer' 6) should you decide to switch to the at89S51 BUY the $25 'cable' the failures of the "kitchen table models" can not be counted.
Erik