Mike Keitz wrote: > > On Mon, 25 May 1998 09:44:04 -0600 Matt Bonner > writes: > >Tjaart van der Walt wrote: > >> 1.8432MHz > > 2.4576MHz ... Any more? > >> 3.6864MHz > >> 11.0592MHz > > > >> You can get all the standard baud rates with these crystals. > > There are two major 'series' of frequencies, with standard crystals > available at each power of 2 in the series: > > (9600 * 192): 1.8432, 3.6864, 7.3728, 14.7456 MHz > (9600 * 256): 2.4576, 4.9152, 9.8304, 19.6608 MHz Also, you can buy 3.579545MHz and 14.318MHz crystals -- these are based on the NTSC colour burst frequency, and due to their appearance in colour TVs (especially the former) they are very cheap. For the 3.58MHz crystal you need a bit loop of 93 instructions, with an accuracy of better than 0.07%. Frank ------------------------------------------------------------------------ Frank A. Vorstenbosch Mobile: +44-976-430 569 Wimbledon, London SW19 Home: +44-181-544 1865 frank@falstaff.demon.co.uk Office: +44-181-636 3391