There is only 3 ICSP pins, the other 3 are Vdd, Gnd and a spare auxiliary pin. With a JDM you may not be able to reprogram the chip. The way I got around it was to power the chip from Vpp via a resistor and 5V zener but to do this you need a proper 12V supply, not one derived from the serial port.
Mike.
Mike.
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