Pic16f84a Cp

imranshoukat · Apr 25, 2007

Hi,

Trying to read a PIC16F84A, but the data shows all 0s and CP gets checked, why is this.

Nigel Goodwin · Apr 25, 2007

Because it's code protected to prevent you reading it!.

imranshoukat · Apr 25, 2007

yes I know that its code protected, but it was not b4, how can it suddenly become code protected.

Nigel Goodwin · Apr 25, 2007

Because someone wrote to the config fuses and set it?.

Try reading without the PIC plugged in, it should read all 0x3FFF's then.

imranshoukat · Apr 25, 2007

ok fine, so how should I unset the config fuses. I am using IC-prog. thanks in advance

Nigel Goodwin · Apr 25, 2007

imranshoukat said:
ok fine, so how should I unset the config fuses. I am using IC-prog. thanks in advance

You can't 'unset them', you have to erase the entire device.

gramo · Apr 26, 2007

Nigel Goodwin said:
You can't 'unset them', you have to erase the entire device.

Yeaup, just click on the erase device icon

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