Recently I got a blurb from TI for a 500MSPS, 16 bit A/D. It appears to be SPI. Seems to me that translates to something like running SPI a little over 8 GHz. Is that even reasonable? --McD --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .