hex file question

[Harley]

if i have a prom chip like from an alarm panel and i need a copy of the factory hex file on the chip, can i DL it with the pickit3?

[dpitts]

Most prom chips have ability to set read security where you cannot read back the chip. Manufactures usually turn on this security to stop competitors from reading the file.

You may be ale to read the prom with Pickit 3 if the prom is a Microchip product that is supported by Picket 3 and there is an ISCP header and security (lock bits) are not set.

A lot of "if's?

[Harley]

yeah we have some boards that had the dealer code changed in it, were trying to rewrite the factory settings back so we can use the boards

[rm357]

What type of prom chip?

There are many variations out there.