SM1125V 查看數據表（PDF） - Nippon Precision Circuits

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SM1125V

Multimelody IC for Pagers

Nippon Precision Circuits  

BLOCK DIAGRAM

SM1125 series

OSC

SI

SC

ST

OSC

Gate

Master slice

SW1

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

Built-in RC oscillator option: External resistor and capacitor connection pins

External clock input option: External reference clock input (gate circuit built-in)

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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