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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: Table 5.4 gives settings for various operating frequencies.
Set bits STS2 to STS0 for a waiting time of at least 10 ms.
Table 5.4
Clock Frequency and Settling Time (times are in ms)
STS2
STS1
0
0
0
0
0
1
0
1
1
*
Note: * Don't care
When an External Clock is Used: Any values may be set. Normally the minimum time (STS2 =
STS1 = STS0 = 0) should be set.
STS0
Waiting Time
0
8,192 states
1
16,384 states
0
32,768 states
1
65,536 states
*
131,072 states
5 MHz
4 MHz
2 MHz
1.6
2.0
4.1
3.2
4.1
8.2
6.6
8.2
16.4
13.1
16.4
32.8
26.2
32.8
65.5
1 MHz
0.5 MHz
8.2
16.4
16.4
32.8
32.8
65.5
65.5
131.1
131.1
262.1
95
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