STAC9750 datasheet(3/73 Pages) IDT

3 / 73 page

STAC9750/9751

VALUE-LINE TWO-CHANNEL AC’97 CODECS

PC AUDIO

IDT™

STAC9750/9751

V 5.8 103106

VALUE-LINE TWO-CHANNEL AC’97 CODECS

LIST OF FIGURES

Figure 1. STAC9750/9751 Block Diagram ...................................................................................................... 6

Figure 2. Cold Reset Timing ......................................................................................................................... 15

Figure 3. Warm Reset Timing ....................................................................................................................... 15

Figure 4. Clocks Timing ................................................................................................................................ 16

Figure 5. Data Setup and Hold Timing ......................................................................................................... 17

Figure 6. Signal Rise and Fall Times Timing ................................................................................................ 17

Figure 7. AC-Link Low Power Mode Timing ................................................................................................. 18

Figure 8. ATE Test Mode Timing .................................................................................................................. 18

Figure 9. STAC9751 Typical Connection Diagram ....................................................................................... 19

Figure 10. AC-Link to its Companion Controller ........................................................................................... 20

Figure 11. AC'97 Standard Bi-directional Audio Frame ................................................................................ 22

Figure 12. AC-Link Audio Output Frame ...................................................................................................... 22

Figure 13. Start of an Audio Output Frame ................................................................................................... 23

Figure 14. STAC9750/9751 Audio Input Frame ........................................................................................... 26

Figure 15. Start of an Audio Input Frame ..................................................................................................... 26

Figure 16. STAC9750/9751 Powerdown Timing

......................................................................................... 29

Figure 17. STAC9750 2-Channel Mixer Functional Diagram

.................................................................. 31

Figure 18. STAC9751 2-Channel Mixer Functional Diagram ....................................................................... 32

Figure 19. Example of STAC9750/9751 Powerdown/Powerup Flow ........................................................... 56

Figure 20. STAC9750/9751 Powerdown/Powerup Flow With Analog Still Active ........................................ 57

Figure 21. STAC9750/9751 Pin Description Drawing ................................................................................... 61

Figure 22. Package Drawing - 48-pin LQFP .................................................................................................. 66

Figure 23. Reflow Profile .............................................................................................................................. 67

Figure 24. STAC9750/9751 Split Independent Power Supply Operation Typical Connection Diagram ....... 70

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