Cirrus-logic CS42L55 Bedienungsanleitung Seite 57
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DS773F1 57
CS42L55
6.20 Master Volume Control:
MSTA (Address 18h) & MSTB (Address 19h)
6.20.1 Master Volume Control
Sets the volume of the signal out the DSP.
6.21 Headphone Volume Control:
HPA (Address 1Ah) & HPB (Address 1Bh)
6.21.1 Headphone Channel x Mute
Configures an analog mute on the headphone amplifier.
6.21.2 Headphone Volume Control
Sets the volume of the signal out of the headphone amplifier.
Note:
1. The step size may deviate from 1.0 dB. Refer to Figure 25 and Figure 26 on page 69.
76543210
MSTxVOL7 MSTxVOL6 MSTxVOL5 MSTxVOL4 MSTxVOL3 MSTxVOL2 MSTxVOL1 MSTxVOL0
MSTxVOL[7:0] Master Volume
0001 1000 +12.0 dB
··· ···
0000 0000 0 dB
1111 1111 -0.5 dB
1111 1110 -1.0 dB
··· ···
0011 0100 -102 dB
··· ···
0001 1001 -102 dB
Step Size: 0.5 dB
76543210
HPxMUTE HPxVOL6 HPxVOL5 HPxVOL4 HPxVOL3 HPxVOL2 HPxVOL1 HPxVOL0
HPxMUTE HP Amp Mute
0 Disabled
1 Enabled
HPxVOL[6:0] Heaphone Volume
0111111 12 dB
... ...
0001100 12 dB
... ...
0000001 +1.0 dB
0000000 0 dB
1111111 -1.0 dB
... ...
1000100 -60.0 dB (Actual volume is approximately -58 dB. (Note 1))
... ...
1000000 -60.0 dB (Actual volume is approximately -58 dB. (Note 1))
Step Size: 1.0 dB
- DIGITAL to ANALOG FEATURES 1
- ANALOG to DIGITAL FEATURES 1
- SYSTEM FEATURES 1
- GENERAL DESCRIPTION 2
- TABLE OF CONTENTS 3
- LIST OF FIGURES 6
- 1. PIN DESCRIPTIONS 8
- 1.1 I/O Pin Characteristics 9
- 2. TYPICAL CONNECTION DIAGRAM 10
- ABSOLUTE MAXIMUM RATINGS 11
- ANALOG INPUT CHARACTERISTICS 12
- HP OUTPUT CHARACTERISTICS 14
- LINE OUTPUT CHARACTERISTICS 15
- Repeated 18
- GND/AGND 19
- 4. APPLICATIONS 22
- 4.2 Analog Inputs 23
- PGAAMUX=’0'b 24
- PGABMUX=’1'b 24
- 4.4 Analog Outputs 26
- +HP Supply +Line Supply 27
- -HP Supply -Line Supply 27
- Output Level 30
- Amplifier Rail 30
- 1 second 30
- 4.5.3 Efficiency 31
- 4.6 Beep Generator 31
- 4.7 Limiter 32
- DS773F1 33 33
- 4.8 Serial Port Clocking 34
- 4.9 Digital Interface Format 34
- 4.10 Initialization 34
- Control Port 37
- Compensation 37
- 4 5 6 7 24 25 38
- 4.14.2.1 Map Increment (INCR) 39
- 5. REGISTER QUICK REFERENCE 40
- DS773F1 41 41
- 6. REGISTER DESCRIPTION 42
- DS773F1 43 43
- 76543210 44
- DS773F1 45 45
- 7 6 5 4 3210 46
- 765432 1 0 49
- DS773F1 51 51
- 6.15 PCMx Mixer Volume: 52
- 6.16.1 Beep Frequency 53
- 6.16.2 Beep On Time 54
- 6.17.1 Beep Off Time 54
- 6.17.2 Beep Volume 55
- 6.18.1 Beep Configuration 55
- 56 DS773F1 56
- 6.22 Line Volume Control: 58
- 6.22.1 Line Channel x Mute 58
- 6.22.2 Line Volume Control 58
- 6.25.1 PCM Mix Channel Swap 60
- 6.25.2 ADC Mix Channel Swap 60
- 6.29.2 ALC Attack Rate 63
- 6.30.1 ALC Release Rate 63
- 6.35.1 Charge Pump Frequency 67
- 7. PCB LAYOUT CONSIDERATIONS 68
- DS773F1 69 69
- 70 DS773F1 70
- 10.PARAMETER DEFINITIONS 71
- 11.PACKAGE DIMENSIONS 72
- THERMAL CHARACTERISTICS 72
- 12.ORDERING INFORMATION 73
- 13.REFERENCES 73
- 14.REVISION HISTORY 73
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