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SM1124 Datenblatt(PDF) 5 Page - Nippon Precision Circuits Inc

Teilenummer SM1124
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

SM1124 Datenblatt(HTML) 5 Page - Nippon Precision Circuits Inc

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SM1124 Series
NIPPON PRECISION CIRCUITS—5
Input during playback mode only
Input during non-playback mode
Playback control
The ST pin controls the start of playback. While ST
is HIGH (VDD), the tune is played repeatedly, and
when ST goes LOW (VSS), playback stops. Tunes
are selected by the input serial data on pins SI and
ST
CLK
ST
CLK
SC. The final 4 bits form the valid selection data, and
this data is retained even after playback.
If serial data is input during playback, the SM1124
ignores this data and playback continues.
* Pin SC should be LOW when either a LOW-to-HIGH or HIGH-to-LOW transition occurs on pin ST.
,,,,,,,,,,,,,,,,,,,
,,,,,,,,,,,,,,,,,,,
,,,,,,,,,,,,,,,,,,,
SI
SC
ST
MTO
B3 B2 B1 B0
Invalid
Data
Valid
Data
Invalid
Data
Serial data selection1
B 3
B 2
B 1
B 0
S T
Music selection
LLLL
L
→ H
1st tune
LLL
H
L
→ H
2nd tune
LL
H
L
L
→ H
3rd tune
LL
H
H
L
→ H
4th tune
LH
L
L
L
→ H
5th tune
LH
LH
L
→ H
6th tune
LH
H
L
L
→ H
7th tune
L
HHH
L
→ H
8th tune
1. H = VDD level, L = VSS level
H
LLL
L
→ H
9th tune
HL
L
H
L
→ H
10th tune
HL
HL
L
→ H
11th tune
HL
H
H
L
→ H
12th tune
HH
L
L
L
→ H
13th tune
HH
L
H
L
→ H
14th tune
HHH
L
L
→ H
15th tune
HHHH
L
→ H
16th tune
B 3
B 2
B 1
B 0
S T
Music selection


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