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(PID 224B 04/96)

MSSI121

12" Instant Voice VROM

April 1996

See 15-page data sheet PID 224B 04/95 for details which belongs to MSSI241.

Taiwan

#1, Creation Road I,

Science - based Industrial Park,

Hsinchu, 30077

Taiwan, ROC

"audio_reply @ccmail.mosel.com.tw"

TEL: 886-3-5770055

FAX: 886-3-5772788

FAX: 886-3-5784732

Taipei

7F, #102 Sec. 3,

Ming Chung E. Road,

Taipei,105

Taiwan, ROC

TEL: 886-2-5451213

FAX: 886-2-5451214

Hongkong

#19 Dai

Fu Street,

Taipo Industrial Estate,

Taipo, N.T.

Hongkong

TEL: 852-2388-8277(MKO)

TEL: 852-2665-4883

FAX: 852-2664-2406

FAX: 852-2770-8011(MKO)

U.S.A.

#3910 North First Street,

San Jose,

CA. 65134-1501

U.S.A.

TEL: 1-408-433-6000

FAX: 1-408-433-0952

Specifications subject to change without notice, contact your sales representatives for the most recent information.

MOSEL VITELIC INC.

Features

Single

power

supply

can

operate

at

2.4V

through 6V.

Current output can drive 8 ohm speaker with a

transistor, Vout can drive buzzer directly.

The voice content is stored for 7-12 seconds for

SI121 including mute and is single section / phrase

and single trigger.

Automatic power down.

A phrase is composed of repetitive sections.

Interrupt function (INTP) stops the audio output

at once.

An LED function with 3Hz flash is provided to

tell the audio status.

Repeat pin was provided to keep audio output

repeating.

Built-in

power

on

play

function

and

is

programmable.

Programmable option for either Retrigger or not.

Programmable option for either Level or Edge trigger

type.

Programmable

option

for

either

Holdable

o

Unholdable output type.

Programmable option for repeat times up to 8 times.

Programmable option for either LED display or STOP

pulse on LED/STP pin.

SI121 can be programmed by MSM9159, MSM9156,

MSM9141S, MSM9140 & MSM9139.

Block Diagram

CLOCK

GENERATOR

CONTROL

LOGIC

TG

INTP

REP

LED/STP

OSC

TIMING

GENERATOR

ADDRESS

GENERATOR

VOICE

ROM

TRIGGER

TABLE

MPCM

DECODER

CURRENT

BUFFER

BUZZER

BUFFER

A STOP pulse comes out when audio signal is

finished.

CDS input interface with 10ms debounce is

provided for trigger pin, REP pin and INTP pin.