UPD9971 datasheet(7/112 Pages) RENESAS

7 / 112 page

µPD9971

Data Sheet S17455EJ2V0DS

CONTENTS

1. FUNCTIONS...............................................................................................................................................9

1.1 General Descriptions of Functions................................................................................................9

1.2 General Descriptions of Circuits....................................................................................................9

2. PINS FUNCTIONS ..................................................................................................................................10

2.1 Pin Configuration...........................................................................................................................10

2.2 Recommended External Circuit ...................................................................................................11

2.3 Descriptions of Pin Functions......................................................................................................12

2.4 Connection of Unused Pins..........................................................................................................17

2.5 Pin Statuses ...................................................................................................................................18

3. CPU INTERFACE....................................................................................................................................21

3.1 Parallel Host CPU Interface ..........................................................................................................21

3.1.1 Write access........................................................................................................................................ 21

3.1.2 Read access........................................................................................................................................ 23

3.2 Serial Host Interface ......................................................................................................................24

3.2.1 Pin functions........................................................................................................................................ 24

3.2.2 Serial formats ...................................................................................................................................... 25

3.2.3 Access formats (3-wire SPI mode) ...................................................................................................... 26

3.2.4 Access formats (4-wire SPI mode) ...................................................................................................... 28

3.2.5 Initialization of serial interface ............................................................................................................. 30

4. MUSIC SERIAL INTERFACE ................................................................................................................31

4.1 Audio Serial Interface (ASIO)........................................................................................................31

4.2 Serial Interface Dedicated to Sound Generator Core External Connection (MSIO) ...............33

5. BLOCK FUNCTIONS..............................................................................................................................34

5.1 Reference Voltage and Current Source Block ............................................................................35

5.2 Regulator Block .............................................................................................................................36

5.3 PLL Block .......................................................................................................................................37

5.4 Sound Generator Core (Sound Generator/3D Positioning/Equalizer) Interface Block...........39

5.5 Audio Serial Interface Block (ASIO).............................................................................................40

5.6 Audio Playback and Digital Gain Adjustment Block ..................................................................42

5.7 Audio Playback Analog Block ......................................................................................................43

5.8 Digital Mixing Block.......................................................................................................................44

5.9 Serial Interface Dedicated to Sound Generator Core External Connection (MSIO) ...............46

6. REGISTERS (CONTROL REGISTER BANK)......................................................................................48

6.1 Standby Setting (STNBY)..............................................................................................................49

6.1.1 STADIG ............................................................................................................................................... 49

6.1.2 STPLL2 ............................................................................................................................................... 49

6.1.3 STPLL1 ............................................................................................................................................... 49

6.1.4 STASI .................................................................................................................................................. 49

6.1.5 STASO ................................................................................................................................................ 49

6.1.6 STSYNTH ........................................................................................................................................... 50

6.1.7 STADAC .............................................................................................................................................. 50

UPD9971 Datasheet(PDF) 7 Page - Renesas Technology Corp

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