Datasheet > UPD7759GC-3BH

UPD7759GC-3BH

更新时间： 2024-09-27 22:17:43

品牌	Logo	应用领域
日电电子 - NEC		语音合成 PC
页数	文件大小	规格书
18页	183K
描述
ADPCM SPEECH SYNTHESIZER LSIs

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UPD7759GC-3BH 数据手册

DATA SHEET

MOS INTEGRATED CIRCUIT

µPD7759

ADPCM SPEECH SYNTHESIZER LSIs

The µPD7759 is an external ROM type speech synthesis LSI employing the waveform coding

method. In addition to the ROM capability of up to 1 Mbit, the µPD7759 realizes the synthesis of

speech sounds of any length by using the ADPCM data transferred from an external ROM.

As the synthesizing method, it adopts the ADPCM method and the PCM + waveform element method.

The ADPCM method is suitable for synthesizing clear and natural speech sounds, and the PCM + waveform

element method is for the synthesis of sound effects and melodies. And by using them together, the

µPD7759 realizes the long-time synthesis of high-quality sounds.

Because of the short turn-around time of speech analysis, the µPD7759 can perform the quick system

development using a PROM, or the evaluation of an on-chip ROM type of the µPD7755 family.

FEATURES

★

● Synthesizing method

● Sampling frequency

● Bit rate (speech)

: ADPCM, PCM + waveform element methods used together

: 5, 6 or 8 kHz

: 20 to 32 K bps

: 256 (MAX.)

● Number of Messages

● External speech data ROM

Parameters

Synthesizing time

Speech data ROM

(External)

Note2

Melodies & sound effects

(PCM + waveform element)

Note1

Speech (ADPCM)

50 sec. (TYP.)

Products

µPD7759

1 Mbits

340 sec. (TYP.)

Note 1. The synthesizing time for the speech is the value for a 6 kHz sampling.

2. The synthesizing time for the melodies & sound effects is variable according to their tone.

● Speech output

● Host CPU interface

● Standby mode

: Current sink type analog output, 9-bit D/A converter

: Compatible with a 4/8-bit CPU

: Pop-noise preventive circuit incorporated

: 2.7 to 5.5 V

● Supply voltage

● CMOS technology

ORDERING INFORMATION

Part Number

Package

Quality grade

Standard

µPD7759C

40-pin plastic DIP (600 mil)

52-pin plastic QFP (■14 mm)

µPD7759GC-3BH

Standard

Please refer to "Quality grade on NEC Semiconductor Devices" (Document number IEI-1209) published by

NEC Corporation to know the specification of quality grade on the devices and its recommended applications.

The information in this document is subject to change without notice.

Document No. IC-2323A

(O.D.No. IC-6960D)

The mark ★ shows revised points.

Date Published January 1993

Printed in Japan

1988, 1993

12 3 4 5 6 7...18

中文翻译

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