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by Im Alec has abandoned this account on October 31st, 2006
32768 is 2 raised to the power 15. So you get a 1-millisecond clock simply by dividing by 2 (a very easy thing to do) 15 times. 1 millisec is good enough for most uses.
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You're reading Why the value of crystals used for real time clock in computers have the value 32.768kHz?
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Technically, dividing by 2 15 times will get you 1 second, not one millisecond. Using a 32.768kHz crystal gives you a clock signal with 32768 pulses per second, so if you increment a time counter every pulse, dividing that counter by 2^15 will yield seconds.
by hoffman.x on February 2nd, 2011