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Table 3.6-3 Oscillation stabilization wait time setting by clock select register (CKSCR)
Clock select bit
WS1
0
0
1
1
HCLK: Oscillation clock frequency
*1: MB90V495G requires 2
*2: The oscillation stabilization wait time taken when the power supply is turned on is fixed at 2
16.38 ms). However, MB90V495G is fixed at 2
Note:
Ceramic or crystal oscillators require an oscillation stabilization wait time of several
milliseconds to some tens of milliseconds to stabilize oscillation. Set the oscillation
stabilization wait time required for the oscillator to be used.
Reference:
For clock, see 3.7 Clock.
Parenthesized values are examples calculated
WS0
10
0
2
/HCLK (256µs)
13
1
2
/HCLK (approx.2.048ms)
14
0
2
/HCLK (approx.4.1ms)
15
1
2
/HCLK (approx.8.19ms)
15
/HCLK when WS1/0 = "10" and 2
Oscillation Stabilization Wait Time
at an oscillation clock frequency of 4 MHz.
*1
*1,*2
17
/HCLK when WS1/0 = "11".
18
/HCLK (approximately 65.54ms).
CHAPTER 3 CPU
16
/HCLK (about
99
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