Tjaart, the problem of Y2k is not the coding in 2 digits, but the erroneous use of this information.. :-( No PICs can be of before, say, 1980 so we have another odd 80 years to go.... Bye, Wim van Bemmel Tjaart van der Walt wrote: > > Hi Dave > > > > This is sort of a little bit late, but I only saw one part of your question > > answered. You asked how one can tell the version of silicon? > > > > According to the databook the following package marking is applicable: > > > > MMMMMMMMM > > AABBCDE > > > > Legend: > > MM..M Microchip part number information > > AA Year code (This will get interesting in Y2K!!) :-) > > BB Week code > > C Facility code of plant where wafer is manufactured > > D MASK REVISION NUMBER for microcontroller > > E Assembly code of plant or country in which part was assembled. > > The letter after the part number also tells you if it is a revised mask. > For instance, a 16C74A is the 'A' revision of the 16C74. > > -- > Friendly Regards > > Tjaart van der Walt > mailto:tjaart@wasp.co.za > _____________________________________________________________ > | WASP International http://www.wasp.co.za/~tjaart/index.html | > | R&D Engineer : GSM peripheral services development | > | Vehicle tracking | Telemetry systems | GSM data transfer | > | Voice : +27-(0)11-622-8686 | Fax : +27-(0)11-622-8973 | > | WGS-84 : 26010.52'S 28006.19'E | > |_____________________________________________________________|