CS4228A

3

3.7 Control Port Signals ......................................................................................................... 18

3.7.1 SPI Mode ............................................................................................................ 18

3.7.2 I2C Mode ............................................................................................................ 18

3.8 Control Port Bit Definitions .............................................................................................. 19

3.9 Power-up/Reset/Power Down Mode ............................................................................... 19

3.10 Power Supply, Layout, and Grounding .......................................................................... 20

4. REGISTER QUICK REFERENCE .......................................................................................... 21

5. REGISTER DESCRIPTIONS .................................................................................................. 22

5.1 Memory Address Pointer (MAP) ..................................................................................... 22

5.2 CODEC Clock Mode ........................................................................................................ 22

5.3 Chip Control ..................................................................................................................... 22

5.4 ADC Control .................................................................................................................... 23

5.5 DAC Mute1 Control ......................................................................................................... 23

5.6 DAC Mute2 Control ......................................................................................................... 24

5.7 DAC De-emphasis Control .............................................................................................. 24

5.8 Digital Volume Control ..................................................................................................... 24

5.9 Serial Port Mode .............................................................................................................. 25

5.10 Chip Status .................................................................................................................... 25

6. PIN DESCRIPTION ................................................................................................................. 26

7. PARAMETER DEFINITIONS .................................................................................................. 29

8. PACKAGE DIMENSIONS ...................................................................................................... 31

LIST OF FIGURES

Figure 1. Serial Audio Port Master Mode Timing ............................................................................ 9

Figure 2. Serial Audio Port Slave Mode Timing .............................................................................. 9

Figure 3. SPI Control Port Timing ................................................................................................. 10

Figure 4. I2C Control Port Timing ................................................................................................. 11

Figure 5. I2C Mode SCL Buffer Example...................................................................................... 11

Figure 6. Recommended Connection Diagram............................................................................. 12

Figure 7. Optional Line Input Buffer .............................................................................................. 13

Figure 8. Passive Output Filter with Mute ..................................................................................... 14

Figure 9. Butterworth Output Filter with Mute ............................................................................... 14

Figure 10. I2S Serial Audio Formats ............................................................................................. 16

Figure 11. Left Justified Serial Audio Formats .............................................................................. 16

Figure 12. Right Justified Serial Audio Formats............................................................................ 17

Figure 13. One Line Data Serial Audio Format ............................................................................. 17

Figure 14. Control Port Timing, SPI Slave Mode Write................................................................. 18

Figure 15. Control Port Timing, I2C Slave Mode Write ................................................................. 19

Figure 16. Control Port Timing, I2C Slave Mode Read................................................................. 19

LIST OF TABLES

Table 1. Serial Audio Port Input Channel Allocations ................................................................... 16

Table 2. User Registers ................................................................................................................ 21

Table 3. Common Master Clock Frequencies.............................................................................. 27