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1

Hardware / Re: HOW TO

09. Mar 2011, 21:54

Where do the 4 cables from the Programmer actually have to lead to? ATMEGA chip or JTAG Port? This is quite missleading "Connect the 4 wires to the JTAG port." as in the detailed description the JTAG pins have to be connected with the ATMEGA feet. 

By the way, where do I connect the extra 5V power supply? which pins?

Obviously I am missing some point. Thus I started to draw some basic scheme. I d be very thankfull if somebody could fill in the missing parts  And please dont laugh at my artistic skills....

The 4 wires from the programmer will be to the ATmega8 chip. The names of the wires corresponding to the ATmega8 chip pin names instead of numbers but you can easily work this out.
So,
MISO -> pin18(ATmega8)
RESET -> pin1(ATmega8)
MOSI -> pin17(ATmega8)
SCK -> pin19(ATmega8)

The extra 5v supply is needed for the powering the ATmega chip whilst programming it. This would be connected to
+5 -> VCC (pin7)
0v(GND) -> (GND) pin8

Would be interested to know how you get on as, I have just switch ISP and now have a unusable BT Vision box.

lastly, you would program the chip(ATmega) before connecting it to the JTAG. So basically your burning a program to the chip then connecting the chip to the JTAG.