CS4245
AIN2A
AIN2B
9,
10
Stereo Analog Input 2 (Input) - The full scale level is specified in the ADC Analog Characteristics
specification table.
AIN1A
AIN1B
11,
12
Stereo Analog Input 1 (Input) - The full scale level is specified in the ADC Analog Characteristics
specification table.
AGND
VA
13 Analog Ground (Input) - Ground reference for the internal analog section.
Analog Power (Input) - Positive power for the internal analog section.
14
15
16
17
AFILTA
AFILTB
VQ1
Antialias Filter Connection (Output) - Antialias filter connection for the channel A ADC input.
Antialias Filter Connection (Output) - Antialias filter connection for the channel B ADC input.
Quiescent Voltage 1 (Output) - Filter connection for the internal quiescent reference voltage.
VQ2
18 Quiescent Voltage 2 (Output) - Filter connection for the internal quiescent reference voltage.
19 Positive Voltage Reference 1 (Output) - Positive reference voltage for the internal sampling circuits.
FILT1+
FILT2+
Positive Voltage Reference 2 (Output) - Positive reference voltage for the internal sampling circuits.
20
AIN4A/MICIN1 21,
Stereo Analog Input 4 / Microphone Input 1 & 2 (Input) - The full scale level is specified in the ADC
Analog Characteristics specification table.
AIN4B/MICIN2
22
AIN5A
AIN5B
23,
24
Stereo Analog Input 5 (Input) - The full scale level is specified in the ADC Analog Characteristics
specification table.
Microphone Bias Supply (Output) - Low noise bias supply for external microphone. Electrical charac-
teristics are specified in the DC Electrical Characteristics specification table.
MICBIAS
25
AIN6A
AIN6B
26,
27
Stereo Analog Input 6 (Input) - The full scale level is specified in the ADC Analog Characteristics
specification table.
28,
29
AUXOUTA
AUXOUTB
Auxiliary Analog Audio Output (Output) - Analog output from either the DAC, the PGA block, or high
impedance. See “Auxiliary Output Source Select (Bits 6:5)” on page 43.
VA
Analog Power (Input) - Positive power for the internal analog section.
Analog Ground (Input) - Ground reference for the internal analog section.
30
31,
32
AGND
33,
34
AOUTA
AOUTB
DAC Analog Audio Output (Output) - The full scale output level is specified in the DAC Analog Char-
acteristics specification table.
Mute Control (Output) - This pin is active during power-up initialization, reset, muting, when master
clock to left/right clock frequency ratio is incorrect, or power-down.
MUTEC
VLS
35
Serial Audio Interface Power (Input) - Determines the required signal level for the serial audio inter-
face. Refer to the Recommended Operating Conditions for appropriate voltages.
36
37
SDIN
Serial Audio Data Input (Input) - Input for two’s complement serial audio data.
SCLK2
38 Serial Port 2 Serial Bit Clock (Input/Output) - Serial bit clock for serial audio interface 2.
Serial Port 2 Left Right Clock (Input/Output) - Determines which channel, Left or Right, is currently
active on the serial audio input data line.
LRCK2
MCLK2
39
Master Clock 2 (Input/Output) -Optional asynchronous clock source for the DAC’s delta-sigma modu-
lators.
40
SDOUT
SCLK1
41 Serial Audio Data Output (Output) - Output for two’s complement serial audio data.
Serial Port 1 Serial Bit Clock (Input/Output) - Serial bit clock for serial audio interface 1.
42
43
Serial Port 1 Left Right Clock (Input/Output) - Determines which channel, Left or Right, is currently
LRCK1
active on the serial audio output data line.
6
CIRRUS [ CIRRUS LOGIC ]
