UPD9971 datasheet(41/112 Pages) RENESAS

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µPD9971

Data Sheet S17455EJ2V0DS

5.4 Sound Generator Core (Sound Generator/3D Positioning/Equalizer) Interface Block

Figure 5-5 Sound Generator Core

EX3DAEN

STSYNTH

Audio

serial I/F

Melody core

3D positioning

AULDG

AURDG

MELLDG

MELRDG

EX3DAEN

PCMRSW

PCMLSW

L-ch

R-ch

L-ch

STADIG

PCMLSW

EX3DAEN

PCMRSW

This block has the following functions:

• Can perform surround processing of PCM data input from ASI, when the sampling frequency is 32 kHz.

• Needs to be set to the expansion 3DA mode (the EX3DAEN bits = high) to perform surround processing of

PCM data input from ASI, when the sampling frequency is 44.1 kHz.

• Switches the output destination of surround-processed data from the MELLDG or MELRDG block to the

AULDG or AURDG block, when the expansion 3DA mode is selected.

• Receives power supply from DVDD.

In this block, the audio serial interface operates when STADIG = high.

In this block, the sound generator core block operates when STSYNTH = high.

The table below shows the selection and addition of audio data that goes through surround processing.

Table 5-3 Selection of Data Going Through Surround Processing

Block

Set Address

Adjustable Range

PCMLSW

0BH

Mute, ASI input

PCMRSW

0BH

Mute, ASI input

UPD9971 Datasheet(PDF) 41 Page - Renesas Technology Corp

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