HVSP needed! When ISP fuse is disabled and DW not working.
High Voltage Serial Programming – (sometimes known as SHVP).
STK500 High Voltage Serial Programming Wiring
The AVR Studio 4 way:
Connect. Select HVSP. Go.
Atmel Studio Read moreAtmel Studio 6 – The production release ready to download
New version! One software for all Atmel MCU’s.
As version 5, this is also MS VS based.
It comes with a large library of free source code — with 1,100 ARM and AVR project examples .