SM1125ABV データシートの表示（PDF） - Nippon Precision Circuits

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SM1125ABV

Multimelody IC for Pagers

Nippon Precision Circuits  

BLOCK DIAGRAM

SM1125ABV

OSC

SI

SC

ST

OSC

1/2 or 1/4

SW2

Divider

1/128

Control

Circuit

Tempo Latch

Tempo Counter

Rhythm

Counter

Scale

Counter

Scale

ROM

Main

ROM

Multi-

Plexer

Address

Counter

Start

Address

Latch

VSS

VDD

MTO

TEST

PIN DESCRIPTION

Number

1

2

3

4

5

6

7

8

Name

OSC

SI

SC

ST

TEST

MTO

VDD

VSS

I/O

Function

I

External resistor and capacitor connection pins

I

Playback control serial interface data input

I

Playback control serial interface clock input

I

Playback start/stop control signal input

I

Test input pin. Leave open or tie to VSS. (pull-down resistance built-in)

O

Playback melody signal output

–

Supply pin (+)

–

Ground pin

SEIKO NPC CORPORATION —2

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