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Chapter 8 Time Base Timer / 8-bit Free-running Timer
VIII - 8
8-bit Free-running Timer
8-bit Free-running Timer as a 1 minute-timer, a 1 second-timer
Table 8-3-2 shows the clock source selection and the TM6OC register setup, when a 8-bit free-running
timer is used as a 1 minute-timer, a 1 second-timer.
Interrupt Generation
Cycle
Clock Source TM6OC Register
1min
fxx1/2
13
X'EF'
1s
fxx1/2
12
X'07'
fxx1/2
13
X'03'
fx = 32.768(kHz)
Table 8-3-2 1 minute-timer, 1 second-timer Setup (Timer 6)
When the 1 minute-timer (1 min.) is set on Table 8-3-2, the bp1 waveform frequency (cycle) of the
TM6BC register is 1 Hz (1 s). So, that can be used for adjusting the seconds.
Figure 8-3-1 Waveform of TM6BC Register bp1 (Timer 6)
1 Hz(1 s)
TM6BC
bp1