Anyone here have experience dumping the contents of an Intel P8742AH OTP EPROM device?
I have one that I haven't been able to dump with either a BP Microsystems BP-1610, or a Data-I/O UniSite device programmer. Both have device entries for that specific device. Both report device connection errors when attempting to read the device. The device pins all look clean. I tried putting a machine pin socket between the device and the programmer ZIF socket in case there was a flakey connection, but that didn't make any difference. I was told the device was working properly in the target system before it was removed to dump its contents. Looking at the UPI-41AH/42AH datasheet 210393-007 the P8742AH does have a security bit which can be programmed. As far as I can tell though, if the security bit is set the device should still respond to the standard device verification algorithm, but just return the wrong data, and the device manufacturer signature should still be able to be read. Or does an Intel P8742AH not respond at all to the standard device verification algorithm if the security bit is set? I don't have the target system myself to reinstall the device and verify that it actually works.
