Thanks, Bruce, for the code on how to get to the DEVID info. I had seen the DEVICE ID register in the data sheet but didn't see any of the 14 bits that were actually providing a serial number of the individual chip. That is what I am after. From the data sheet DEVID only provides device type (DEVID1<7:5>, device revision(DEVID1<4:0>, device part number (DEVID2<7:0>, none of which appear to be a unique serial number.
Is my information incorrect that there is a unique serial number somewhere in the chip? I was led to believe it was in there by the following statement in the 18F4550 data sheet:
"17.10.6.1 Device Descriptor
The device descriptor provides general information,
such as manufacturer, product number, serial number,
the class of the device and the number of configurations."
This statement doesn't seem to correlate with the DEVID register description in the same data sheet , so if there is a serial number in there it is well hidden in the data sheet info.
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