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16 STOPWATCH TIMER (SWT)
16.3 Operating Clock
The stopwatch timer uses the 256 Hz clock output from the OSC module as its operating clock.
The OSC module generates this clock by dividing the OSC1 clock by 128. Therefore, the clock frequency is 256
Hz when the OSC1 clock frequency is 32.768 kHz. Be aware that the frequencies described in this chapter change
if the OSC1 clock has another frequency.
The OSC module does not provide a control bit for the 256 Hz clock. The 256 Hz clock is always supplied to the
stopwatch timer when the OSC1 oscillator is on.
For control of the OSC1 oscillator, see Chapter 7, "Oscillator (OSC)."
EPSON
S1C17704 TECHNICAL MANUAL
16-3
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