In Circuit PIC reading

Feb 21, 2005 1 Replies

Hi



I have a circuit that has a PIC controller and it has 5 connection points that are connected to the correct points for in circuit programming. I also have a PIC programmer board with an in circuit programming header. My idea was to read the code on the PIC, possible modify it. So I hooked it all up and when I went to read it the programmer did not find a PIC chip to read. I did not venture any farther because I thought that code protection may be enabled on the PIC, but then when I thought some more I realised it may be my connections or something wrong with what I was doing. Before I try again can anyone tell me what happens when trying to read a code protected PIC? Does it find it but not read it or not find it completly like I already found? Also can I do any damage to the circuit(as long as everything is connected to the right connections)?


Cheers Paul


Some PIC's read out scrambled, others all zero. Your programmer should be able to check whether there's a PIC connected or not. If all connections are made according to Microchip's recommendations (not just wired) you will not damage your circuit.

HTH, Mark Van Borm

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