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SM1125 Datenblatt(PDF) 10 Page - Nippon Precision Circuits Inc

Teilenummer SM1125
Bauteilbeschribung  Multimelody IC for Pagers
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Hersteller  NPC [Nippon Precision Circuits Inc]
Direct Link  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM1125 Datenblatt(HTML) 10 Page - Nippon Precision Circuits Inc

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SM1125 series
SEIKO NPC CORPORATION —10
Tempo
There are 29 tempos that can be selected for each melody. The tempo varies with the clock frequency.
Quarter note ( ) length = 1536
× tempo counter frequency divider ÷ clock frequency
(Ex. 1) Tempo code = 1F (divider = 32), clock frequency = 32.768kHz (32.768kHz system)
1536
× 32 ÷ 32768 = 1.5 (seconds)
(Ex. 2) Tempo code = 18 (divider = 25), CLK frequency = 153.6kHz (38.4kHz system)
1536
× 25 ÷ 38400 = 1.0 (seconds)
Table 5. Tempo range
ROM
32.768kHz system
37.5kHz system
38.4kHz system
48kHz system
Code
Frequency
divider
Tempo
=
Tempo
=
Tempo
=
Tempo
=
03
4
Prestissimo
320.0
Prestissimo
366.2
Prestissimo
375.0
Prestissimo
468.8
04
5
256.0
293.0
300.0
375.0
05
6
213.3
244.1
250.0
312.5
06
7
Presto
182.9
209.3
214.3
267.9
07
8
Allegro
160.0
Presto
183.1
Presto
187.5
234.4
08
9
142.2
Allegro
162.8
Allegro
166.7
208.3
09
10
128.0
146.5
150.0
Presto
187.5
0A
11
Moderato
116.4
133.2
136.4
170.5
0B
12
106.7
122.1
125.0
Allegro
156.3
0C
13
Andante
98.5
Moderato
112.7
Moderato
115.4
144.2
0D
14
91.4
Andante
104.6
107.1
133.9
0E
15
85.3
97.7
Andante
100.0
125.0
0F
16
80.0
91.6
93.8
Moderato
117.2
10
17
Adagio
75.3
86.2
88.2
110.3
11
18
71.1
81.4
83.3
Andante
104.2
12
19
67.4
77.1
78.9
98.7
13
20
Larghetto
64.0
Adagio
73.2
Adagio
75.0
93.8
14
21
61.0
69.8
71.4
89.3
15
22
Largo
58.2
66.6
68.2
85.2
16
23
55.7
Larghetto
63.7
Larghetto
65.2
81.5
17
24
53.3
61.0
62.5
78.1
18
25
51.2
Largo
58.6
60.0
Adagio
75.0
19
26
49.2
56.3
Largo
57.7
72.1
1A
27
47.4
54.3
55.6
69.4
1B
28
45.7
52.3
53.6
67.0
1C
29
44.1
50.5
51.7
Larghetto
64.7
1D
30
42.7
48.8
50.0
62.5
1E
31
41.3
47.3
48.4
60.5
1F
32
40.0
45.8
46.9
Largo
58.6


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