Selection Of Oscillator Waiting Time After Exit From Software Standby Mode - Hitachi H8/3022 Hardware Manual

17.4.3 Selection of Oscillator Waiting Time after Exit from Software Standby Mode

Bits STS2 to STS0 in SYSCR, and its DIV1 and DIV0 in DIVCR should be set as follows.
Crystal Resonator: Set STS2 to STS0, and DIV1 and DIV0 so that the waiting time (for the clock
to stabilize) is at least 7 ms. Table 17-3 indicates the waiting times that are selected by STS2 to
STS0, and DIV1 and DIV0 settings at various system clock frequencies.
External Clock: Any value may be set.
Table 17-3 Clock Frequency and Waiting Time for Clock to Settle
DIV1 DIV0 STS2 STS1
0 0 0 0
0 0
0 1
0 1
1 0
1 0
1 1
0 1 0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 0 0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1 0 0
0 0
0 1
0 1
1 0
1 0
1 1
: Recommended setting
Waiting
STS0 Time 18 MHz
0 8,192 states 0.46
1 16,384 states 0.91
0 32,768 states 1.8
1 65,536 states 3.6
0 131,072 states 7.3
1 1024 states 0.057
— Illegal setting
0 8192 states 0.91
1 16384 states 1.8
0 32768 states 3.6
1 65536 states 7.3
0 131072 states 14.6
1 1024 states 0.11
— Illegal setting
0 8192 states 1.8
1 16384 states 3.6
0 32768 states 7.3
1 65536 states 14.6
0 131072 states 29.1
1 1024 states 0.23
— Illegal setting
0 8192 states 3.6
1 16384 states 7.3
0 32768 states 14.6
1 65536 states 29.1
0 131072 states 58.3
1 1024 states 0.46
— Illegal setting
16 MHz 12 MHz 10 MHz
0.51 0.65 0.8
1.0 1.3 1.6
2.0 2.7 3.3
4.1 5.5 6.6
8.2 10.9 13.1
0.064 0.085 0.10
1.02 1.4 1.6
2.0 2.7 3.3
4.1 5.5 6.6
8.2 10.9 13.1
16.4 21.8 26.2
0.13 0.17 0.20
2.0 2.7 3.3
4.1 5.5 6.6
8.2 10.9 13.1
16.4 21.8 26.2
32.8 43.7 52.4
0.26 0.34 0.41
4.1 5.5 6.6
8.2 10.9 13.1
16.4 21.8 26.2
32.8 43.7 52.4
65.5 87.4 104.9
0.51 0.68 0.82
8 MHz 6 MHz 4 MHz 2 MHz
1.0 1.3 2.0 4.1
2.0 2.7 4.1 8.2
4.1 5.5 8.2 16.4
8.2 10.9 16.4 32.8
16.4 21.8 32.8 65.5
0.13 0.17 0.26 0.51
2.0 2.7 4.1 8.2
4.1 5.5 8.2 16.4
8.2 10.9 16.4 32.8
16.4 21.8 32.8 65.5
32.8 43.7 65.5 131.1
0.26 0.34 0.51 1.0
4.1 5.5 8.2 16.4
8.2 10.9 16.4 32.8
16.4 21.8 32.8 65.5
32.8 43.7 65.5 131.1
65.5 87.4 131.1 262.1
0.51 0.68 1.02 2.0
8.2 10.9 16.4 32.8
16.4 21.8 32.8 65.5
32.8 43.7 65.5 131.1
65.5 87.4 131.1 262.1
131.1 174.8 262.1 524.3
1.0 1.4 2.0 4.1
1 MHz Unit
8.2 ms
16.4
32.8
65.5
131.1
1.0
16.4 ms
32.8
65.5
131.1
262.1
2.0
32.8 ms
65.5
131.1
262.1
524.3
4.1
65.5 ms
131.1
262.1
524.3
1048.6
8.2
503