Cirrus Logic CS42L52 User Manual
Page 9
DS680F2
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CS42L52
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AGND
17
Analog Ground (Input) - Ground reference for the internal analog section.
FILT+
18
Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling cir-
cuits.
VQ
19
Quiescent Voltage (Output) - Filter connection for the internal quiescent voltage.
MICBIAS
20
Microphone Bias (Output) - Low noise bias supply for an external microphone. Electrical charac-
teristics are specified in the DC Electrical Characteristics table.
AIN4A,B
AIN3A,B
21,22
23,24
Line-Level Analog Inputs (Input) - Single-ended stereo line-level analog inputs.
MIC1+,-
MIC2+,-
21,23
22,24
Differential Microphone Inputs (Input) - Differential stereo microphone inputs.
MIC2A,B
MIC1A,B
21,22
23,24
Single-Ended Microphone Inputs (Input) - Single-ended stereo microphone inputs.
AIN2A,B
AIN1A,B
25,26
29,30
Line-Level Analog Inputs (Input) - Single-ended stereo line-level analog inputs.
AFILTA,B
27,28 Anti-alias Filter Connection (Output) - Anti-alias filter connection for the ADC inputs.
SPKR/HP
31
Speaker/Headphone Switch (Input) - Powers down the left and/or right channel of the speaker
and/or headphone outputs.
RESET
32
Reset (Input) - The device enters a low power mode when this pin is driven low.
VL
33
Digital Interface Power (Input) - Determines the required signal level for the serial audio inter-
face and host control port.
VD
34
Digital Power (Input) - Positive power for the internal digital section.
DGND
35
Digital Ground (Input) - Ground reference for the internal digital section.
SDOUT
36
Serial Audio Data Output (Output) - Output for two’s complement serial audio data.
MCLK
37
Master Clock (Input) - Clock source for the delta-sigma modulators.
SCLK
38
Serial Clock (Input/Output) - Serial clock for the serial audio interface.
SDIN
39
Serial Audio Data Input (Input) - Input for two’s complement serial audio data.
LRCK
40
Left Right Clock (Input/Output) - Determines which channel, Left or Right, is currently active on
the serial audio data line.
GND/Thermal Pad
-
Ground reference for PWM power FETs and charge pump; thermal relief pad for optimized heat
dissipation.