SM1126 데이터 시트보기 (PDF) - Nippon Precision Circuits
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SM1126 Datasheet PDF : 18 Pages
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SM1126 Series
Tempo
There are 29 tempos that can be selected for each melody. The tempo does not vary with the clock frequency.
Table 5. Tempo range
Code
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
1F
Frequency divider
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Tempo
Prestissimo
Presto
Allegro
Moderato
Andante
Adagio
Larghetto
Largo
=
320.0
256.0
213.3
182.9
160.0
142.2
128.0
116.4
106.7
98.5
91.4
85.3
80.0
75.3
71.1
67.4
64.0
61.0
58.2
55.7
53.3
51.2
49.2
47.4
45.7
44.1
42.7
41.3
40.0
Quarter note ( ) length = {1536 (32.768 kHz system) or 1800 (38.4 kHz system)} × tempo counter frequency
divider ÷ clock frequency
(Ex. 1) Tempo code = 1F (divider = 32), clock frequency = 32.768 kHz (32.768 kHz system)
1536 × 32 ÷ 32768 = 1.5 (seconds)
(Ex. 2) Tempo code = 18 (divider = 25), CLK frequency = 153.6 kHz (38.4 kHz system)
1800 × 25 ÷ 38400 = 1.17 (seconds)
NIPPON PRECISION CIRCUITS—16
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