Cirrus-logic CS42L56 Manual de usuario Pagina 74
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74 DS851F2
CS42L56
6.23.3 ADC x Input Select
Selects the specified analog input signal into ADCx.
Note: Pseudo-differential inputs are not available when the PGA is bypassed. Use the AINx_REF bits
(Analog Input 1 x Reference Configuration and “Analog Input 1 x Reference Configuration” on page 74)
to properly configure the input channel.
6.24 HPF Control (Address 1Bh)
6.24.1 ADCx High-Pass Filter
Configures the internal high-pass filter after ADCx.
6.24.2 ADCx High-Pass Filter Freeze
Configures the high pass filter’s digital DC subtraction and/or calibration after ADCx.
6.24.3 HPF x Corner Frequency
Sets the corner frequency (-3 dB point) for the internal High-Pass Filter (HPF).
ADCxMUX[1:0] Selected Input to ADCx
00 PGAx - Use PGAxMUX bit (“PGA x Input Select” on page 77) to select an input channel.
01 AIN1x; PGA is bypassed.
10 AIN2x; PGA is bypassed.
11 AIN3x; PGA is bypassed.
76543210
HPFB HPFRZB HPFA HPFRZA HPFB_CF1 HPFB_CF0 HPFA_CF1 HPFA_CF0
HPFx High Pass Filter Status
0 Disabled
1 Enabled
HPFRZx High Pass Filter Digital Subtraction
0 Continuous DC Subtraction
1 Frozen DC Subtraction
HPFx_CF[1:0] HPF Corner Frequency Setting (Fs=48 kHz)
00 1.8 Hz
01 119 Hz
10 236 Hz
11 464 Hz
- DIGITAL to ANALOG FEATURES 1
- ANALOG to DIGITAL FEATURES 1
- SYSTEM FEATURES 2
- GENERAL DESCRIPTION 2
- TABLE OF CONTENTS 3
- LIST OF FIGURES 7
- 1. PIN DESCRIPTIONS 8
- DS851F2 9 9
- 1.1 I/O Pin Characteristics 10
- DS851F2 11 11
- 12 DS851F2 12
- DS851F2 13 13
- ABSOLUTE MAXIMUM RATINGS 14
- ANALOG INPUT CHARACTERISTICS 14
- DS851F2 15 15
- HP OUTPUT CHARACTERISTICS 18
- LINE OUTPUT CHARACTERISTICS 19
- Test Load 20
- Measurement 20
- DS851F2 21 21
- VA = 2.5 V VA = 1.8 V 21
- Min Typ Max Min Typ Max Unit 21
- Repeated 23
- DC CHARACTERISTICS 26
- DS851F2 27 27
- 4. APPLICATIONS 30
- 4.2 Analog Inputs 31
- 4.2.2 Large-scale Inputs 32
- 4.2.3 Microphone Inputs 34
- 4.2.4 Optional VCM Buffer 34
- 4.4 Analog Outputs 37
- 4.5 Class H Amplifier 38
- 4.5.1 Power Control Options 39
- Class H 40
- Controller 40
- Output Level 43
- Amplifier Rail 43
- 1 second 43
- 4.6 Beep Generator 44
- RRATE[5:0]ARATE[5:0] 46
- 48 DS851F2 48
- Figure 32. I²S Format 49
- 4.13 Control Port Operation 53
- 4.13.1 SPI Control 53
- 4.13.2 I²C Control 53
- 4.13.3.1 Map Increment (INCR) 54
- 5. REGISTER QUICK REFERENCE 55
- 56 DS851F2 56
- 6. REGISTER DESCRIPTION 57
- 76543210 58
- 66 DS851F2 66
- DS851F2 67 67
- 72 DS851F2 72
- DS851F2 73 73
- 76 5 4 3 2 1 0 76
- DS851F2 77 77
- 7 6 5 4 3210 82
- 7. PCB LAYOUT CONSIDERATIONS 87
- 88 DS851F2 88
- DS851F2 89 89
- 10.PARAMETER DEFINITIONS 90
- 11.PACKAGE DIMENSIONS 91
- THERMAL CHARACTERISTICS 91
- 12.ORDERING INFORMATION 92
- 13.REFERENCES 92
- 14.REVISION HISTORY 92
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