Cirrus-logic CS4234 Manuale Utente Pagina 19
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DS899F1 19
CS4234
Figure 6. TDM Serial Audio Interface Timing
SDOUT1
(output )
SDINx
(input )
t
ds
SCLK
(input )
FS/LRCK
(input )
MSB
t
dh1
MSB-1
t
lcks
t
dh2
MSB MSB-1
t
dh2
t
LPW
~
~
~
t
ds
MSB
t
dh1
t
dh2
MSB-1
t
lcks
FS/LRCK
(input /output )
SCLK
(input /output )
SDINx
(input)
SDOUTx
(output )
MSB
MSB-1
Figure 7. PCM Serial Audio Interface Timing
- DAC Features 1
- ADC Features 1
- System Features 1
- Class H Controller Features 1
- Common Applications 1
- General Description 2
- TABLE OF CONTENTS 3
- LIST OF FIGURES 4
- LIST OF TABLES 5
- 1. PIN DESCRIPTIONS 6
- 1.1 I/O Pin Characteristics 7
- DS899F1 8 8
- ABSOLUTE MAXIMUM RATINGS 9
- TYPICAL CURRENT CONSUMPTION 11
- ANALOG INPUT CHARACTERISTICS 12
- CS4234 AINx 13
- DS899F1 13 13
- CS4234 AINx + 13
- 25000/Fs 14
- ANALOG OUTPUT CHARACTERISTICS 15
- DIGITAL I/O CHARACTERISTICS 17
- DS899F1 19 19
- 4. APPLICATIONS 21
- 4.2.2 Power-down 22
- DS899F1 23 23
- 4.2.3 DAC DC Loading 24
- 4.3 I²C Control Port 25
- 4.3.1.1 Map Increment (INCR) 26
- 4.4 System Clocking 26
- 4.4.1 Master Clock 26
- 4.4.3 Slave Mode Clock Ratios 27
- 4.5 Serial Port Interface 28
- 4.5.1 TDM Mode 28
- 32-Bit Channel Block 29
- 24-Bit Audio Word 29
- 8-Bit Zero Pad 29
- (Or DAC5 Data) 29
- DS899F1 30 30
- 4.6 Internal Signal Path 32
- 4.6.1.1 ADC Signal Routing 32
- 4.6.2 ADC Path 38
- 4.6.2.1 Analog Inputs 38
- 4.6.2.2 ADC HPF 38
- 4.6.3 DAC1-4 Path 39
- 4.6.3.1 De-emphasis Filter 39
- 4.6.4 Low-Latency Path 40
- 4.6.5 DAC5 Path 41
- 4.6.5.4 De-emphasis Filter 42
- 4.6.5.5 Filter Options 42
- 4.6.6 Volume Control 42
- 4.6.6.1 Mute Behavior 43
- 4.6.6.2 Soft Ramp 44
- MIN_DELAY 45
- MAX_DELAY 45
- 4.6.6.3 Noise Gate 46
- 4.7 Reset Line 47
- 4.8.1 Interrupt Masking 47
- DS899F1 49 49
- 5. REGISTER QUICK REFERENCE 50
- DS899F1 51 51
- 6. REGISTER DESCRIPTIONS 52
- 6.3.1 Base Rate Advisory 53
- 6.3.2 Speed Mode 53
- 6.3.3 Master Clock Rate 53
- 6.4.1 Output Sample Width 54
- 6.4.2 Input Sample Width 54
- 6.4.4 DAC5 Sample Width 54
- 7654321 0 55
- 6.6.1 DAC1-4 Data Source 56
- 6.6.2 Low-latency Path Source 56
- 6.7.1 SDIN1 Mask 1 57
- 6.8.1 SDIN1 Mask 2 57
- 6.9.1 SDIN2 Mask 1 58
- 6.10.1 SDIN2 Mask 2 58
- 76543210 59
- 6.11.3 Group Delay 60
- 6.12.1 VA Select 60
- 6.12.3 Invert ADCx 60
- DS899F1 61 61
- Mutes the ADCx signal 61
- Powers down the ADCx path 61
- 6.15.1 DAC1-4 Noise Gate 62
- 6.15.2 DAC1-4 De-emphasis 62
- 6.15.3 DAC5 De-emphasis 62
- 6.19.1 Mute Delay 65
- 6.19.2 Minimum Delay 65
- 6.19.3 Maximum Delay 65
- 6.20.1 x Volume Control 66
- 6.21.1 INT MODE 66
- 6.21.2 Interrupt Pin Polarity 66
- 6.25.1 DACx Clip 69
- 7. ADC FILTER PLOTS 70
- 8. DAC FILTER PLOTS 71
- DS899F1 72 72
- 9. PACKAGE DIMENSIONS 73
- 10.ORDERING INFORMATION 74
- DS899F1 75 75
- 11.1 Voltage Headroom 76
- 11.2 Lead Time 76
- 11.3 Gain Matching 76
- 11.4 SMPS (TPS) Modes 77
- DS899F1 78 78
- 12.REVISION HISTORY 79
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