Cirrus Logic CS42L73 - Manual

Copyright  Cirrus Logic, Inc. 2013
(All Rights Reserved)
http://www.cirrus.com
JULY '13
DS882F1
Ultralow Power Mobile Audio and Telephony CODEC
Product Overview
 Stereo analog-to-digital converter (ADC)
 Dual analog or digital mic support
 Dual mic bias generators
 Four digital-to-analog converters (DACs)
coupled to five outputs
– Ground-centered stereo headphone amp.
– Ground-centered stereo line output
– Mono ear speaker amplifier
– Mono 1-W speakerphone amplifier
– Mono speakerphone line output for stereo
speakerphone expansion
 Three serial ports with asynchronous sample
rate converters
 Digital audio mixing and routing
Ultralow Power Consumption
 3.8-mW quiescent headphone playback
Applications
 Smart phones, ultramobile PCs, and mobile
Internet devices
System Features
 Native (no PLL required) support for 6/12/
24 MHz, 13/26 MHz, and 19.2/38.4 MHz
master clock rates and typical audio clock rates
 Integrated high-efficiency power management
reduces power consumption
– Internal LDO regulator to reduce internal
digital operating voltage to VL/2 V
– Step-down charge pump provides low
headphone/line out supply voltage
– Inverting charge pump accommodates low
system voltage by providing negative rail for
HP and line amplifier
 Flexible speakerphone amplifier powering
– 3.00–5.25 V range
– Independent cycling
 Power-down management
– Individual controls for ADCs, digital mic
interface, mic bias generators, serial ports,
and output amplifiers and associated DACs
 Programmable thermal overload notification
 High-speed I²C™ control port (400 kHz)
(Features continued on page 2 )
`
Line Outputs
Pseudo Diff. Input
-
+
+VCP_FILT
-VCP_FILT
Digital Processing
Le
ve
l S
h
ift
er
s
CS42L73
Decimator,
HPF,
Noise
Gate,
ALC,
Volume,
Mute,
Swap/Mono
Volume, Mute, Limiter
MCLK
Stereo
Multi-bit
 DAC
MCLK
Stereo
Multi-bit
 DAC
LDO
VD_FILT Headphone Outputs
Pseudo Diff. Input
-
+
+VCP_FILT
-VCP_FILT
Ear Speaker Output
VA
-
+
B
Speakerphone Line
Output (Right) -
+
VP
B
VP
Speakerphone Output
(Left) -
+
VP
A
VA
VA
Digital MIC Interface Digital MIC Interface
VL
MCLK
Stereo
Multi-bit
 ADC
-6 to +12 dB,
0.5 dB steps
-
+
MIC 2
MIC 1
Pseudo Diff. Input
Pseudo Diff. Input
Line Input (Left)
Line Input (Right)
Pseudo Diff. Input
+10 or
+20 dB
-
+
+10 or
+20 dB
-
+
MIC 1 Bias MIC 2 Bias
MIC Bias Short Detect MIC Bias
Audio Serial Port
Voice Serial Port
Auxiliary Serial Port
Audio
Serial Port
SDOUT
SDIN
ASRC
ASRC
Voice
Serial Port
SDOUT
ASRC
Auxiliary
Serial Port
SDIN
ASRC
SDOUT
ASRC
SDIN
ASRC
-VCP_FILT
Inverting
Step-Down
VCP +VCP_FILT
+VCP_FILT
-VCP_FILT
MCLK
MCLK1
MCLK2
Control Port Control Port
VP
VD_FILT
Digital Mixer Volume, Mute, Limiter
MIC2_SDET
+
Audio Serial Port
Voice Serial Port
Auxiliary Serial Port
MIC/Line Input Path
CS42L73