Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uwm.edu!rutgers!rochester!pt.cs.cmu.edu!a.gp.cs.cmu.edu!koopman From: koopman@a.gp.cs.cmu.edu (Philip Koopman) Newsgroups: comp.arch Subject: Re: why is 33 MHz a popular number? Summary: standard oscillator freqs. Message-ID: <11214@pt.cs.cmu.edu> Date: 28 Nov 90 12:43:27 GMT References: <1990Nov28.030500.16103@mozart.amd.com> Organization: Carnegie-Mellon University, CS/RI Lines: 12 Many times, the frequencies are picked based on standard crystal clock oscillator frequencies. It's real handy for system designers to be able to get an oscillator off-the-shelf instead of special-ordering them (especially for prototypes). These oscillators tend to have even-MHz values (there are one or two notable exceptions). This is the difference between system-level thinking and component- level thinking... Phil Koopman koopman@greyhound.ece.cmu.edu Arpanet 2525A Wexford Run Rd. Wexford, PA 15090 *** this space for rent ***