This is an accessory for ISP programmers.
One example of an ARV ISP programmer is
the AVR910 Programmer, which you can learn about by clicking on this
link.
I am tired of wiring up ISP sockets for every little breadboard I
build, so I built this little adapter. It plugs into a 20 pin IC
socket for an AVR on a breadboard. On the adapter is the 6 pin ISP
header in the same configuration used on the STK-500. Besides saving me
time, it also means I
don't have to make room on the prototype for the ISP header. I've also
made an 8 pin version for the ATTiny12.
The writing is simple: pins on the 20 pin socket are soldered to the
corresponding pins on the 20 pin header. The six pins of the ISP
header, as identified in the AVR910 application note from Atmel, are
wired to the corresponding pins on the 20 pin socket, as identified by
the AT90S2313 datasheet.
Below is a wiring diagram showing the adapter for the 20 pin AVR
processors.
Wiring for the 20 pin adapter. The wiring for the 8 pin
adapter is similar, though the pin numbers are different.
