SigmaTel, Inc.
Data Sheet
STAC9721
9.6 AC-LINK LOW POWER MODE 36
9.7 ATE TEST MODE
10. ELECTRICAL SPECIFICATIONS:...38
Table of Contents
37
GENERAL DESCRIPTION:.........................1
TABLE OF CONTENTS................................2
TABLE OF CONTENTS – FIGURES..........3
1. PIN/SIGNAL DESCRIPTIONS .............7
10.1
10.2
10.3
10.4
10.5
10.6
MAXIMUM RATINGS:
38
RECOMMENDED CONDITIONS 38
POWER CONSUMPTION
AC-LINK STATIC DIGITAL
STAC9721 ANALOG
STAC9723 ANALOG
39
41
41
43
1.1 DIGITAL I/O
7
8
9
1.2 ANALOG I/O
1.3 FILTER/REFERENCES/GPIO
1.4 POWER AND GROUND SIGNALS 9
APPENDIX A................................................45
APPENDIX B ................................................46
2. AC-LINK................................................10
2.1 CLOCKING
2.2 RESET
10
10
TABLE of Tables
Table 1. Package Dimensions
Table 2. Pin Designation
3. DIGITAL INTERFACE........................11
3.1 AC-LINK SERIAL INTERFACE 11
3.2 AC-LINK LOW POWER MODE 18
4
4
Table 3. Digital Signal List
7
4. STAC9721/23 MIXER...........................19
Table 4. Analog Signal List
8
4.1 MIXER INPUT
20
20
20
21
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
9
4.2 MIXER OUTPUT
20
21
22
22
4.3 PC BEEP IMPLEMENTATION
4.4 PROGRAMMING REGISTERS:
5. LOW POWER MODES........................29
Table 10. Analog Mixer Input Gain Register 23
Table 11. Record Select Control Registers 23
Table 12. Left Record Select Control Registers 23
6. MULTIPLE CODEC SUPPORT .........31
6.1 PRIMARY/SECONDARY CODEC 31
6.2 SECONDARY CODEC ACCESS 32
Table 13. Record Gain Registers
Table 14. General Purpose Register
24
24
7. TESTABILITY ......................................32
8. EXTENDED FUNCTIONALITY ........33
Table 15. 3D Control Registers Error! Bookmark
8.1 ANTI-POP CIRCUITRY
33
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
25
26
27
28
29
31
32
9. AC TIMING CHARACTERISTICS .33
9.1 COLD RESET
33
34
34
35
35
9.2 WARM RESET
9.3 CLOCKS
9.4 DATA SETUP AND HOLD
9.5 SIGNAL RISE AND FALL
Table 19. Codec ID Selection
Table 20. Secondary Codec Register Access
2
04/07/00
04/07/00
ETC [ ETC ]
