User Manual
Table Of Contents
- 1. Pin Descriptions
- 2. Typical Connection Diagram
- 3. Characteristic and Specifications
- Recommended Operating Conditions
- Absolute Maximum Ratings
- Analog Input Characteristics
- ADC Digital Filter Characteristics
- Analog Output Characteristics
- Analog Passthrough Characteristics
- PWM Output Characteristics
- Headphone Output Power Characteristics
- Line Output Voltage Level Characteristics
- Combined DAC Interpolation and onChip Analog FIlter Response
- Switching Specifications - Serial Port
- Switching Specifications - I²C Control Port
- DC Electrical Characteristics
- Digital Interface Specifications and Characteristics
- Power Consumption
- 4. Applications
- 4.1 Overview
- 4.2 Analog Inputs
- 4.3 Analog Outputs
- 4.4 Analog In to Analog Out Passthrough
- 4.5 PWM Outputs
- 4.6 Serial Port Clocking
- 4.7 Digital Interface Formats
- 4.8 Initialization
- 4.9 Recommended Power-up Sequence
- 4.10 Recommended Power-Down Sequence
- 4.11 Required Initialization Settings
- 4.12 Control Port Operation
- 5. Register Quick Reference
- 6. Register Description
- 6.1 Chip I.D. and Revision Register (Address 01h) (Read Only)
- 6.2 Power Control 1 (Address 02h)
- 6.3 Power Control 2 (Address 03h)
- 6.4 Power Control 3 (Address 04h)
- 6.5 Clocking Control (Address 05h)
- 6.6 Interface Control 1 (Address 06h)
- 6.7 Interface Control 2 (Address 07h)
- 6.8 Input x Select: ADCA and PGAA (Address 08h), ADCB and PGAB (Address 09h)
- 6.9 Analog and HPF Control (Address 0Ah)
- 6.10 ADC HPF Corner Frequency (Address 0Bh)
- 6.11 Misc. ADC Control (Address 0Ch)
- 6.12 Playback Control 1 (Address 0Dh)
- 6.13 Miscellaneous Controls (Address 0Eh)
- 6.14 Playback Control 2 (Address 0Fh)
- 6.15 MICx Amp Control:MIC A (Address 10h) and MIC B (Address 11h)
- 6.16 PGAx Vol. and ALCx Transition Ctl.: ALC, PGA A (Address 12h) and ALC, PGA B (Address 13h)
- 6.17 Passthrough x Volume: PASSAVOL (Address 14h) and PASSBVOL (Address 15h)
- 6.18 ADCx Volume Control: ADCAVOL (Address 16h) and ADCBVOL (Address 17h)
- 6.19 ADCx Mixer Volume: ADCA (Address 18h) and ADCB (Address 19h)
- 6.20 PCMx Mixer Volume: PCMA (Address 1Ah) and PCMB (Address 1Bh)
- 6.21 Beep Frequency and On Time (Address 1Ch)
- 6.22 Beep Volume and Off Time (Address 1Dh)
- 6.23 Beep and Tone Configuration (Address 1Eh)
- 6.24 Tone Control (Address 1Fh)
- 6.25 Master Volume Control: MSTA (Address 20h) and MSTB (Address 21h)
- 6.26 Headphone Volume Control: HPA (Address 22h) and HPB (Address 23h)
- 6.27 Speaker Volume Control: SPKA (Address 24h) and SPKB (Address 25h)
- 6.28 ADC and PCM Channel Mixer (Address 26h)
- 6.29 Limiter Control 1, Min/Max Thresholds (Address 27h)
- 6.30 Limiter Control 2, Release Rate (Address 28h)
- 6.31 Limiter Attack Rate (Address 29h)
- 6.32 ALC Enable and Attack Rate (Address 2Ah)
- 6.33 ALC Release Rate (Address 2Bh)
- 6.34 ALC Threshold (Address 2Ch)
- 6.35 Noise Gate Control (Address 2Dh)
- 6.36 Status (Address 2Eh) (Read Only)
- 6.37 Battery Compensation (Address 2Fh)
- 6.38 VP Battery Level (Address 30h) (Read Only)
- 6.39 Speaker Status (Address 31h) (Read Only)
- 6.40 Charge Pump Frequency (Address 34h)
- 7. Analog Performance Plots
- 8. Example System Clock Frequencies
- 9. PCB Layout Considerations
- 10. ADC and DAC Digital Filters
- 11. Parameter Definitions
- 12. Package Dimensions
- 13. Ordering Information
- 14. References
- 15. Revision History
DS680F2 49
CS42L52
3/1/13
6.8.2 PGA Input Mapping
Selects one or sums/mixes the analog input signal into the PGA. Each bit of the PGAx_SEL[5:1] word
corresponds to individual channels (i.e. PGAx_SEL1 selects AIN1x, PGAx_SEL2 selects AIN2x, etc.).
6.9 Analog and HPF Control (Address 0Ah)
6.9.1 ADCx High-Pass Filter
Configures the internal high-pass filter after ADCx.
6.9.2 ADCx High-Pass Filter Freeze
Configures the high pass filter’s digital DC subtraction and/or calibration after ADCx.
6.9.3 Ch. x Analog Soft Ramp
Configures an incremental volume ramp from the current level to the new level at the specified rate.
6.9.4 Ch. x Analog Zero Cross
Configures when the signal level changes occur for the analog volume controls.
Note: If the signal does not encounter a zero crossing, the requested volume change will occur after a
timeout period of 1024 sample periods (approximately 10.7 ms at 48 kHz sample rate).
PGAxSEL[5:1] Selected Input to PGAx (Examples)
00000 No inputs selected
00001 AIN1x
00010 AIN2x
00100 AIN3x
01000 AIN4x
10000
MICx;
for single-ended MIC inputs, use MICxSEL (“MIC x Select” on page 55) to select MIC 1 or MIC 2; for
differential MIC inputs, enable MICxCFG (
“MICx Configuration” on page 55)
10001 MICx + AIN1x
10011 MICx + AIN1x + AIN2x
Application: “Analog Inputs” on page 25
Note: Table does not show all possible combinations.
76543210
HPFB HPFRZB HPFA HPFRZA ANLGSFTB ANLGZCB ANLGSFTA ANLGZCA
HPFx High Pass Filter Status
0 Disabled
1 Enabled
HPFRZx High Pass Filter Digital Subtraction
0 Continuous DC Subtraction
1 Frozen DC Subtraction
ANLGSFTx Volume Changes Affected Analog Volume Controls
0 Do not occur with a soft ramp
MICxGAIN[4:0] (“MICx Gain” on page 55), PGAxVOL[5:0] (“PGAx Volume”
on page 56), and PASSxVOL[7:0] (“Passthrough x Volume” on page 57)
1 Occur with a soft ramp
Ramp Rate: 1/2 dB every 16 LRCK cycles
ANLGZCx Volume Changes Affected Analog Volume Controls
0
Do not occur on a zero cross-
ing
MICxGAIN[4:0] (“MICx Gain” on page 55), PGAxVOL[5:0] (“PGAx Volume”
on page 56), and PASSxVOL[7:0] (“Passthrough x Volume” on page 57)
1 Occur on a zero crossing