At 08:02 AM 6/7/2007, Xiaofan Chen wrote: >That being said, my experience with the TI TMS470 ARM7 >MCU is not that positive. It is really very fragile and consume >quite some current. It requires dual core 1.8V/3.3V and >its I/Os are not 5V tolerant. The main reason for us to use it is >that it can operate at 105 degree C. Just thought that I'd chime in here: you *do* know that the older "16C" chips work very well while hot? I have acquaintances who routinely and regularly tell me that they run some of those parts well past 150 degrees C. They use them in down-hole test equipment - it gets hot in deep holes. Apparently only the older "C" (eprom based) parts are usable at those temperatures. Definite hearsay on my part - I haven't need to run any uP's that hot myself. Food for thought . . . dwayne -- Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist