This crystal value is a good chioce for any one using serial communication as it gives integer value of X at all baud rates! Mike Keitz wrote: >Also forget the tables in the data book, which don't even mention 4.9152 >MHz, and go by the formula. With a BRGH=0, the divisor to load in the >baud rate generator is: > >X = ((XTAL/64) / baud) - 1 > >For 4.9152 MHz and baud = 9600, X works out exactly to 7. Ranna M. V. Consultant Engineer NEURON SYSTEMS 4/77, 13th Main Road Tel/Fax:+91-80-529 6071 HAL 2nd Stage Email: ranna@blr.vsnl.net.in Bangalore 560 008, INDIA