-------------------------------------------------- From: "Olin Lathrop" Sent: Friday, September 24, 2010 1:31 PM To: "Microcontroller discussion list - Public." Subject: Re: [PIC] A catalogue of cock-ups > >> AND SO the IC would not be expected to die >> BECAUSE the absolute rating of voltage and current has not been >> exceeded. > > But it has. In this senario the Vdd max rating is not exceeded, but the > MCLR to Vdd maximum probably has (if it's the usual 300mV, I didn't=20 > check). > Some PIC datasheets also specify a maximum protection diode current, > although later datasheets seem to deal with that by specifying such a low > voltage on the diode that it can't possibly conduct any "real" amount of > current. It appears that it may not have died if I understand correctly - to quote=20 the OPs later post: >It seems the other PIC may not have been faulty after all... >I've just replaced the chip that I thought the ICD2 blew up, and I'm >still getting a device ID of zero in the MPLAB IDE. I've checked.... So maybe it actually survived, I guess we won't know unless he tries it and= =20 reports back though..=20 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .