The PIC 12C508A is OTP unless it is a "JW" package type. OTP == One time programmable. Time to go buy some more chips. You'll need the $$$ "JW" type for development. Bob Ammerman RAm Systems (contract development of high performance, high function, low-level software) ----- Original Message ----- From: Mg To: Sent: Friday, January 26, 2001 9:49 AM Subject: [PIC]: How to erase 12c508a?? > Hello Pic-rs! > Anyway to erase a 12c508A?? Some other numbers on the chip are 04/PHBW and > 9915. > > The reason I'm asking is I've got a few of these little fellas. I've > programmed 2 of them, needed to change the code on one of them, and the > erase command is greyed out, ie: i cant use it. I'm using the September 2k > release of P16PRO and I've also tried to use the latest version of PICALL, > (I have a parallel programmer). The erase command is greyed out for all > 12c50X devices... can't any of these devices be erased?? > > I read about Microchips OTP devices but I would have thought that Microchip > would release some flash 12c50X? - ie: erasable 12c50X devices.. > > I bought my 12c fellas under the impression I could erase them! I debug code > by trial and error - code the chip, wack it in the circuit, and see if it > works.. > > I'm fully thinking I've missed something here.. > > Thanks guys! > -Mg > > PS: The piclist has been my night time reading for many many months now! And > no I don't mean it helps me to fall asleep! :) I've finally broken my > silence! yeehaa! > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu > > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu