CS4244 Datasheet, PDF (3/63 Pages) Cirrus Logic – 4 In/4 Out Audio CODEC with PCM and TDM Interfaces

CS4244
LIST OF FIGURES
Figure 1.CS4244 Pinout .............................................................................................................................. 5
Figure 2.Typical Connection Diagram ......................................................................................................... 7
Figure 3.Test Circuit for ADC Performance Testing .................................................................................. 13
Figure 4.PSRR Test Configuration ............................................................................................................ 13
Figure 5.Equivalent Output Test Load ...................................................................................................... 16
Figure 6.TDM Serial Audio Interface Timing ............................................................................................. 20
Figure 7.PCM Serial Audio Interface Timing ............................................................................................. 20
Figure 8.I²C Control Port Timing ............................................................................................................... 21
Figure 9.System Level Initialization and Power-Up/Down Sequence ....................................................... 23
Figure 10.DAC DC Loading ...................................................................................................................... 24
Figure 11.Timing, I²C Write ....................................................................................................................... 25
Figure 12.Timing, I²C Read ....................................................................................................................... 25
Figure 13.Master Mode Clocking .............................................................................................................. 27
Figure 14.TDM System Clock Format ....................................................................................................... 28
Figure 15.32-bit Receiver Channel Block .................................................................................................. 28
Figure 16.Serial Data Coding and Extraction Options within the TDM Streams ....................................... 29
Figure 17.Left Justified Format ................................................................................................................. 30
Figure 18.I²S Format ................................................................................................................................. 30
Figure 19.Audio Path Routing ................................................................................................................... 31
Figure 20.Conventional SDOUT (Left) vs. Sidechain SDOUT (Right) Configuration ................................ 32
Figure 21.DAC1-4 Serial Data Source Selection ...................................................................................... 33
Figure 22.Example Serial Data Source Selection ..................................................................................... 34
Figure 23.ADC Path .................................................................................................................................. 35
Figure 24.Single-Ended to Differential Active Input Filter ......................................................................... 36
Figure 25.Single-Ended to Differential Active Input Filter - DC Coupled Input Signal (VA/2 Centered) .... 36
Figure 26.DAC1-4 Path ............................................................................................................................. 37
Figure 27.De-emphasis Curve .................................................................................................................. 38
Figure 28.Passive Analog Output Filter .................................................................................................... 38
Figure 29.Volume Implementation for the DAC1-4 Path ........................................................................... 39
Figure 30.Soft Ramp Behavior .................................................................................................................. 40
Figure 31.Interrupt Behavior and Example Interrupt Service Routine ....................................................... 44
Figure 32.ADC Stopband Rejection .......................................................................................................... 59
Figure 33.ADC Transition Band ................................................................................................................ 59
Figure 34.ADC Transition Band (Detail) .................................................................................................... 59
Figure 35.ADC Passband Ripple .............................................................................................................. 59
Figure 36.ADC HPF (48 kHz) .................................................................................................................... 59
Figure 37.ADC HPF (96 kHz) .................................................................................................................... 59
Figure 38.SSM DAC Stopband Rejection ................................................................................................. 60
Figure 39.SSM DAC Transition Band ....................................................................................................... 60
Figure 40.SSM DAC Transition Band (Detail) ........................................................................................... 60
Figure 41.SSM DAC Passband Ripple ..................................................................................................... 60
Figure 42.DSM DAC Stopband Rejection ................................................................................................. 61
Figure 43.DSM DAC Transition Band ....................................................................................................... 61
Figure 44.DSM DAC Transition Band (Detail) ........................................................................................... 61
Figure 45.DSM DAC Passband Ripple ..................................................................................................... 61
Figure 46.Package Drawing ...................................................................................................................... 62
DS900F2
3