> If you look at typical MAX speeds, they indicate 2Mhz. RAMTRON > has 2Mhz SPI. is that a typo, http://www.ramtron.com/doc/Products/Nonvolatile/Nonvolatile_list.asp?ID=5 indicates that thier SPI chips range in max frequency from 5mhz all the way up to 25mhz. btw since this is the piclist i belive the maximum SPI speed a PIC18 can achive is fosc/2, so assuming you are running the chips in spec that means a limit of 10mhz for most pic18 chips and 12mhz for the USB ones. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist