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H8/3021 Datasheet(PDF) 543 Page - Renesas Technology Corp

Part # H8/3021
Description  16-Bit Single-Chip Microcomputer
PDF  712 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8/3021 Datasheet(HTML) 543 Page - Renesas Technology Corp

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17. Power-Down State
Rev.2.00 Mar. 22, 2007 Page 519 of 684
REJ09B0352-0200
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
STS0
Waiting
Time
18 MHz
16 MHz
12 MHz
10 MHz
8 MHz
6 MHz
4 MHz
2 MHz
1 MHz
Unit
0
0
0
0
0
8,192 states
0.46
0.51
0.65
0.8
1.0
1.3
2.0
4.1
8.2
ms
ms
ms
ms
0
0
1
16,384 states
0.91
1.0
1.3
1.6
2.0
2.7
4.1
8.2
16.4
0
1
0
32,768 states
1.8
2.0
2.7
3.3
4.1
5.5
8.2
16.4
32.8
0
1
1
65,536 states
3.6
4.1
5.5
6.6
8.2
10.9
16.4
32.8
65.5
1
0
0
131,072 states
7.3
8.2
10.9
13.1
16.4
21.8
32.8
65.5
131.1
1
0
1
1024 states
0.057
0.064
0.085
0.10
0.13
0.17
0.26
0.51
1.0
11
—
0
1
0
0
0
8192 states
0.91
1.02
1.4
1.6
2.0
2.7
4.1
8.2
16.4
0
0
1
16384 states
1.8
2.0
2.7
3.3
4.1
5.5
8.2
16.4
32.8
0
1
0
32768 states
3.6
4.1
5.5
6.6
8.2
10.9
16.4
32.8
65.5
0
1
1
65536 states
7.3
8.2
10.9
13.1
16.4
21.8
32.8
65.5
131.1
1
0
0
131072 states
14.6
16.4
21.8
26.2
32.8
43.7
65.5
131.1
262.1
1
0
1
1024 states
0.11
0.13
0.17
0.20
0.26
0.34
0.51
1.0
2.0
1
1
—
Illegal setting
Illegal setting
Illegal setting
Illegal setting
1
0
0
0
0
8192 states
1.8
2.0
2.7
3.3
4.1
5.5
8.2
16.4
32.8
0
0
1
16384 states
3.6
4.1
5.5
6.6
8.2
10.9
16.4
32.8
65.5
0
1
0
32768 states
7.3
8.2
10.9
13.1
16.4
21.8
32.8
65.5
131.1
0
1
1
65536 states
14.6
16.4
21.8
26.2
32.8
43.7
65.5
131.1
262.1
1
0
0
131072 states
29.1
32.8
43.7
52.4
65.5
87.4
131.1
262.1
524.3
1
0
1
1024 states
0.23
0.26
0.34
0.41
0.51
0.68
1.02
2.0
4.1
11
—
1
1
0
0
0
8192 states
3.6
4.1
5.5
6.6
8.2
10.9
16.4
32.8
65.5
0
0
1
16384 states
7.3
8.2
10.9
13.1
16.4
21.8
32.8
65.5
131.1
0
1
0
32768 states
14.6
16.4
21.8
26.2
32.8
43.7
65.5
131.1
262.1
0
1
1
65536 states
29.1
32.8
43.7
52.4
65.5
87.4
131.1
262.1
524.3
1
0
0
131072 states
58.3
65.5
87.4
104.9
131.1
174.8
262.1
524.3
1048.6
1
0
1
1024 states
0.46
0.51
0.68
0.82
1.0
1.4
2.0
4.1
8.2
11
—
: Recommended setting



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