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MB90335 Series
■ Function of Clock Supply
The clock supply function supplies the operating clock to the timer for oscillation stabilization wait time
and some peripheral functions. Table 9.1-2 shows the clock cycle supplied from the time-base timer to each
peripheral.
Table 9.1-2 Clock Cycles Supplied from Time-base Timer
Where to Supply Clock
Oscillation Stabilization
Wait Time
Watchdog timer
HCLK: Oscillation clock
The value in parentheses is applicable when the oscillation clock operates at 6 MHz.
Reference:
Because oscillation cycles is changeable after oscillation starts, the oscillation stabilization wait time
is listed for reference.
CM44-10137-6E
Clock Cycle
13
2
/HCLK (Approx. 1.4 ms)
15
2
/HCLK (Approx. 5.5 ms)
17
2
/HCLK (Approx. 21.8 ms)
12
2
/HCLK (Approx. 0.68 ms)
14
2
/HCLK (Approx. 2.7 ms)
16
2
/HCLK (Approx. 10.9 ms)
19
2
/HCLK (Approx. 87.4 ms)
FUJITSU MICROELECTRONICS LIMITED
CHAPTER 9 TIME-BASE TIMER
9.1 Overview of Time-base Timer
Remark
Oscillation Stabilization Wait Time for ceramic oscillator
Oscillation Stabilization Wait Time for crystal oscillator
Watchdog timer count up clock
171
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