SM1126 View Datasheet(PDF) - Nippon Precision Circuits

Part Name

Description

Manufacturer

SM1126

Melody IC with Built-in SRAM

Nippon Precision Circuits  

BLOCK DIAGRAM

SM1126 Series

OSC

SIO

SC

ST

OSC

Gate

Master slice

SW1

Frequency

Multiplier

Divider

Master slice

SW2

Divider

Control

Circuit

Scale

Counter

Scale

ROM

Main Main

RAM ROM

Tempo Latch

Tempo Counter

Rhythm

Counter

Multi-

Plexer

Address

Counter

Start

Address

Latch

VSS

VDD

MTO

TEST

(Pull-down resistance

built-in)

PIN DESCRIPTION

Number

1

2

3

4

5

6

7

8

Name

OSC

SIO

SC

ST

TEST

MTO

VDD

VSS

Function

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

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

Playback control serial interface data input. During parity check, the G flag is output while ST is HIGH.

Playback control serial interface clock input

Play mode: Playback start/stop control signal input

Write mode: Serial interface data write control signal input

Test input. Pull-down resistor built-in. Leave open or connect to VSS.

Playback melody signal output

Supply

Ground

NIPPON PRECISION CIRCUITS—2

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