Pls help...Need schematic diagram for interfacing AT89c51 with PC...

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Joined Jul 21, 2010
Am doing a simple proj with AT89C51,LM35,ADC0804&LCD module to display the temp in LCD..i want to interface AT89C51 with PC through parallel port for programming...So cud anyone pls help me by giving schematic diagram for a simple develpoment board of AT89c51or AT89c51programmer..Pls tel me in detail abt interfacing AT89C51 with PC with the diagram so that i can implement it..Also tel me whether it is easy to interface using USB interface.?
& is there any thing to be taken care of in program if am going for USB or parallel port interfacing..? What should be the software that i sud use to download it to the controller..?