STAC9721 datasheet(2/48 Pages) ETC1

2 / 48 page

SigmaTel, Inc.

Data Sheet

STAC9721

04/07/00

Table of Contents

GENERAL DESCRIPTION:.........................1

TABLE OF CONTENTS................................2

TABLE OF CONTENTS – FIGURES ..........3

1. PIN/SIGNAL DESCRIPTIONS .............7

1.1

DIGITAL I/O

1.2

ANALOG I/O

1.3

FILTER/REFERENCES/GPIO

1.4

POWER AND GROUND SIGNALS 9

2. AC-LINK ................................................10

2.1

CLOCKING

2.2

RESET

3. DIGITAL INTERFACE........................11

3.1

AC-LINK SERIAL INTERFACE

3.2

AC-LINK LOW POWER MODE 18

4. STAC9721/23 MIXER...........................19

4.1

MIXER INPUT

4.2

MIXER OUTPUT

4.3

PC BEEP IMPLEMENTATION

4.4

PROGRAMMING REGISTERS:

5. LOW POWER MODES ........................29

6. MULTIPLE CODEC SUPPORT .........31

6.1

PRIMARY/SECONDARY CODEC 31

6.2

SECONDARY CODEC ACCESS

7. TESTABILITY ......................................32

8. EXTENDED FUNCTIONALITY ........33

8.1

ANTI-POP CIRCUITRY

9. AC TIMING CHARACTERISTICS .33

9.1

COLD RESET

9.2

WARM RESET

9.3

CLOCKS

9.4

DATA SETUP AND HOLD

9.5

SIGNAL RISE AND FALL

9.6

AC-LINK LOW POWER MODE 36

9.7

ATE TEST MODE

10. ELECTRICAL SPECIFICATIONS: ...38

10.1

MAXIMUM RATINGS:

10.2

RECOMMENDED CONDITIONS 38

10.3

POWER CONSUMPTION

10.4

AC-LINK STATIC DIGITAL

10.5

STAC9721 ANALOG

10.6

STAC9723 ANALOG

APPENDIX A ................................................45

APPENDIX B ................................................46

TABLE of Tables

Table 1. Package Dimensions

Table 2. Pin Designation

Table 3. Digital Signal List

Table 4. Analog Signal List

Table 5. Filtering and Voltage References

Table 6. Mixer Functional Connections

Table 7. Programming Registers

Table 8. Play Master Volume Register

Table 9. PC_BEEP Register

Table 10. Analog Mixer Input Gain Register

Table 11. Record Select Control Registers

Table 12. Left Record Select Control Registers 23

Table 13. Record Gain Registers

Table 14. General Purpose Register

Table 15. 3D Control Registers

Error! Bookmark

not defined.

Table 16. Powerdown Status Registers

Table 17. Extended Audio ID Functions

Table 19: Analog Current Adjust

Table 16. Multi-Channel Programming

Table 18. Low Power Modes

Table 19. Codec ID Selection

Table 20. Secondary Codec Register Access

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