Timing
Most RTCs use a crystal oscillator, but some use the power line frequency. In many cases the oscillator's frequency is 32.768 kHz. This is the same frequency used in quartz clocks and watches, and for the same reasons, namely that the frequency is exactly 215 cycles per second, which is a convenient rate to use with simple binary counter circuits.
Read more about this topic: Real-time Clock
Famous quotes containing the word timing:
“Is it a new spring star
Within the timing chill,
Talking, or just a mime,
That rises in the blood
Thin Jack-and-Jilling seas
Without the human will?”
—Allen Tate (1899–1979)
“A great man always considers the timing before he acts.”
—Chinese proverb.