At 07:21 PM 8/4/02 -0400, you wrote: >One thing that must be concidered is that any error that the Resonator or >crystal has will also be multiplied by 4. This could effect high speed >serial IO. As I dig further into this I will post my results. Not true. If the oscillator frequency is 300ppm off, the serial comms will also be off by 300ppm. One for one, to a first approximation (ignoring second order effects in the PLL). Best regards, Spehro Pefhany --"it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com 9/11 United we Stand -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu