HD6433802H Datasheet, PDF (121/435 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

5.3.3 Oscillator Settling Time after Standby Mode is Cleared
Bits STS2 to STS0 in SYSCR1 should be set as follows.
• When a crystal oscillator is used
The table below gives settings for various operating frequencies. Set bits STS2 to STS0 for a
waiting time at least as long as the oscillation settling time.
Table 5.4 Clock Frequency and Settling Time (times are in ms)
STS2
0
0
0
0
1
1
1
1
STS1
0
0
1
1
0
0
1
1
STS0
0
1
0
1
0
1
0
1
Waiting Time
8,192 states
16,384 states
1,024 states
2,048 states
4,096 states
2 states
(Use prohibited)
8 states
16 states
5 MHz
1.638
3.277
0.205
0.410
0.819
0.0004
0.0002
0.003
2 MHz
4.1
8.2
0.512
1.024
2.048
0.001
0.004
0.008
• When an external clock is used
STS2 = 1, STS1 = 0, and STS0 = 1 should be set. Other values possible use, but CPU sometimes
will start operation before waiting time completion.
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