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181
CHAPTER 11 TIMEBASE TIMER
■ Clock Supply
The timebase timer supplies an operation clock to the resources such as an oscillation stabilization wait
time timer, PPG timer, and watchdog timer. Table 11.1-2 shows the clock cycles supplied from the
timebase timer to each resource.
Table 11.1-2 Clock Cycles Supplied from Timebase Timer
Where to supply clock Clock cycle
Oscillation stabilization wait time*
2
10
/HCLK (approx. 256 µs)
2
13
/HCLK (approx. 2.0 ms)
2
15
/HCLK (approx. 8.2 ms)
2
17
/HCLK (approx. 32.8 ms)
Watchdog timer
2
12
/HCLK (approx. 1.0 ms)
2
14
/HCLK (approx. 4.1 ms)
2
16
/HCLK (approx. 16.4 ms)
2
19
/HCLK (approx. 131.1 ms)
PPG timer
2
9
/HCLK (approx. 128 µs)
HCLK: Oscillation clock
The parenthesized values are provided at 4-MHz oscillation clock.
*:As the oscillation cycle is unstable immediately after oscillation starts, standard oscillation
stabilization wait time values are given as a guide.