Cs42l51 – Cirrus Logic CS42L51 User Manual
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DS679F1
CS42L51
AOUTB
AOUTA
10
11
Analog Audio Output (Output) - The full-scale output level is specified in the DAC Analog Characteris-
tics specification table
VA
12
Analog Power (Input) - Positive power for the internal analog section.
AGND
13
Analog Ground (Input) - Ground reference for the internal analog section.
DAC_FILT+
14
Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling circuits.
VQ
15
Quiescent Voltage (Output) - Filter connection for internal quiescent voltage.
ADC_FILT+
16
Positive Voltage Reference (Output) - Positive reference voltage for the internal sampling circuits.
MICIN1/
AIN3A
17
Microphone Input 1 (Input) - The full-scale level is specified in the ADC Analog Characteristics specifi-
cation table.
MICIN2/
BIAS/AIN3B
18
Microphone Input 2 (Input/Output) - The full-scale level is specified in the ADC Analog Characteristics
specification table. This pin can also be configured as an output to provide a low noise bias supply for an
external microphone. Electrical characteristics are specified in the DC Electrical Characteristics table.
AIN2A
19
Analog Input (Input) - The full-scale level is specified in the ADC Analog Characteristics specification
table.
AIN2B/BIAS
20
Analog Input (Input/Output) - The full-scale level is specified in the ADC Analog Characteristics specifi-
cation table. This pin can also be configured as an output to provide a low noise bias supply for an exter-
nal microphone. Electrical characteristics are specified in the DC Electrical Characteristics table.
AFILTA
AFILTB
21
22
Filter Connection (Output) - Filter connection for the ADC inputs.
AIN1A
AIN1B
23
24
Analog Input (Input) - The full-scale level is specified in the ADC Analog Characteristics specification
table.
RESET
25
Reset (Input) - The device enters a low power mode when this pin is driven low.
VL
26
Digital Interface Power (Input) - Determines the required signal level for the serial audio interface and
host control port. Refer to the Recommended Operating Conditions for appropriate voltages.
VD
27
Digital Power (Input) - Positive power for the internal digital section.
DGND
28
Digital Ground (Input) - Ground reference for the internal digital section.
SDOUT
(M/S)
29
Serial Audio Data Output (Output) - Output for two’s complement serial audio data.
Serial Port Master/Slave (Input/Output) - Hardware Mode Startup Option: Selects between Master and
Slave Mode for the serial port.
MCLK
30
Master Clock (Input) - Clock source for the delta-sigma modulators.
SCLK
31
Serial Clock (Input/Output) - Serial clock for the serial audio interface.
SDIN
32
Serial Audio Data Input (Input) - Input for two’s complement serial audio data.
Thermal Pad
-
Thermal relief pad for optimized heat dissipation. See
.