Product Summary

The UPD7759GC 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 UPD7759GC 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 UPD7759GC realizes the long-time synthesis of high-quality sounds. Because of the short turn-around time of speech analysis, the UPD7759GC can perform the quick system development using a PROM.

Parametrics

UPD7759GC absolute maximum ratings: (1)Power supply voltage VDD: –0.3 to + 7.0 V; (2)Input voltage VI: –0.3 to VDD + 0.3 V; (3)Output voltage Vo: –0.3 to VDD + 0.3 V; (4)Storage temperature Tstg: –40 to +125 ℃; (5)Operating temperature Topt: –10 to +70 ℃.

Features

UPD7759GC features: (1)Synthesizing method : ADPCM, PCM + waveform element methods used together; (2)Sampling frequency : 5, 6 or 8 kHz; (3)Bit rate (speech) : 20 to 32 K bps; (4)Number of Messages : 256 (MAX.); (5)Externaspeech data ROM.

Diagrams

UPD7759GC Measuring circuit

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