Z89340 View Datasheet(PDF) - Zilog

Part Name

Description

Manufacturer

Z89340

DIGITAL WAVETABLE ENGINE

Zilog 

Z89340

Digital Wavetable Engine

ADPCM Oscillator

ROM. Also, the wavetable synthesis extensions of the

The ADPCM Oscillator works in much the same way as the

Sample Loop and Wavetable Oscillators. The main differ-

ences are that, due to the nature of ADPCM, the frequency

cannot be negative (you cannot with the Sample Loop Os-

cillator you can play a sound backwards, with Wavetable

Mode and ADPCM), and ADPCM will not allow playing a

sound faster than the sampling rate at which it is stored in

Wavetable Mode Oscillator are not available. The Z89340

handles IMA/DVI format ADPCM in 4- and 8-bit modes.

The ADPCM Oscillator provides a way to compact the da-

ta, but with some degree of sound degradation. However,

in many applications the trade-off may be worthwhile. (Re-

fer to Figure 11 for ADPCM-IMA/DVI Oscillator Address

Map).

1

Figure 11. The ADPCM-IMA/DVI Oscillator Address Map

DS96DSP0201

PRELIMINARY

1-17

Share Link: