Mike Hord wrote: >> 1. The data sheet. >> 2. The data sheet. >> 3. The data sheet. > > + errata + reference manuals I agree with the errata, but there is very little in the "midrange" and the similar 18F family reference manuals that isn't in the data sheet. I gave up on those years ago. Every time I went to look for a little more detailed information there wasn't any, so I stopped bothering. The dsPIC documentation on the other hand is arranged differently. There the Programmer's Reference Manual describes the instruction set and the Family reference manual describes the peripherals. This information is NOT duplicated in the data sheets. The data sheets only give pretty useless rough overviews of the peripherals. The only purpose of the data sheet is to provide the electrical specs and the specifics that vary from device to device, like the pinout, memory sizes, and mix of peripherals. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist