pin voltage while programming

[mackrackit]

I isolate VPP and VDD, never worried about PGD and PGC. But I never thought about it either...

[ruijc]

Hi guys,

Thank you for your thoughts,

Actually i can isolate both VDD, PGD, PGC and VPP either using jumpers or using these pins only for ICSP.

The problem are the other pins. I'm not being able to accurately measure the voltage peeks but there's definitely voltage in those pins ( not all of them though ).

If one of them peeks more than 3V i may damage the component.

Regards
Rui

[mister_e]

Isolate Vdd and Vss then.... or, like I said, use a programmer allowing to modify it's Vdd... OR modify it yourself, not that hard.