CS4922 データシートの表示（PDF） - Cirrus Logic

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CS4922

MPEG/G.729A Audio Decoder System

Cirrus Logic 

CS4922

TABLE OF CONTENTS

1 CHARACTERISTICS AND SPECIFICATIONS .......................................................4

ANALOG CHARACTERISTICS .........................................................................4

D/A INTERPOLATION FILTER CHARACTERISTICS.......................................4

ABSOLUTE MAXIMUM RATINGS ....................................................................5

RECOMMENDED OPERATING CONDITIONS ................................................5

DIGITAL CHARACTERISTICS ..........................................................................5

SWITCHING CHARACTERISTICS - CLOCKS .................................................6

SWITCHING CHARACTERISTICS - EXTERNAL FLAGS ................................6

SWITCHING CHARACTERISTICS - PROGRAMMABLE INPUT/OUTPUT ....... 6

SWITCHING CHARACTERISTICS - BOOT INITIALIZATION...........................7

SWITCHING CHARACTERISTICS - CONTROL PORT (SPI MODE)...............8

SWITCHING CHARACTERISTICS - CONTROL PORT (I2C MODE) .............10

SWITCHING CHARACTERISTICS - SERIAL AUDIO PORT ..........................12

SWITCHING CHARACTERISTICS - AUXILIARY DIGITAL AUDIO PORT .....13

2 TYPICAL CONNECTION DIAGRAM.....................................................................14

3 THEORY OF OPERATION ...................................................................................15

3.1 Introduction .....................................................................................................15

4 PERIPHERALS .....................................................................................................15

4.1 Clock Manager ................................................................................................15

4.2 33-bit Counter .................................................................................................16

4.3 Digital to Analog Converter .............................................................................16

4.4 Digital Audio Transmitter .................................................................................17

4.5 Audio Serial Input Port ....................................................................................17

4.6 Auxiliary Digital Audio Port ..............................................................................17

4.7 Serial Control Port ...........................................................................................17

4.7.1 I2C Mode ...............................................................................................18

4.7.2 Rise Time on SCL/SCK ........................................................................20

4.7.3 SPI mode ..............................................................................................20

4.8 External Flag Pins ...........................................................................................22

5 BOOT PROCEDURE ............................................................................................23

6 POWER SUPPLY AND GROUNDING .................................................................24

7 DAC FILTER RESPONSE PLOTS .......................................................................26

8 PIN DESCRIPTIONS..............................................................................................27

Power Supplies ...............................................................................................27

Digital-to-Analog Converter .............................................................................28

Serial Audio Port .............................................................................................28

Digital Audio Transmitter .................................................................................28

Clock Manager ................................................................................................28

Control ............................................................................................................29

Serial Control Port ...........................................................................................30

Auxiliary Digital Audio Port ..............................................................................30

9 PARAMETER DEFINITIONS .................................................................................31

10PACKAGE DIMENSIONS ...................................................................................32

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