CS4226 Datasheet, PDF (30/60 Pages) Cirrus Logic – Surround Sound Codec

CS4226
Analog Inputs
AIN1L, AIN1R - Left and Right Channel Mux Input 1, PINS 14, 13.
Analog signal input connections for the right and left channels for multiplexer input 1.
AIN2L/FREQ0, AIN2R/FREQ1 - Left & Right Channel Mux Input 2/Channel Status Freq. Bits,
PINS 11, 12.
Analog signal input connections for the right and left channels for multiplexer input 2. When
CSP = 1, these pins are configured as channel status outputs indicating the sampling frequency.
AIN3L/AUTODATA, AIN3R/AUDIO - Left & Right Channel Mux Input 3/AC3 and MPEG
Detect Output, PINS 10, 9.
Analog signal input connections for the right and left channels for multiplexer input 3. When
CSP = 1, AIN3L is configured as an output indicating the presence of an AC-3 or MPEG data
stream at the RX input and AIN3R is configured as a channel status output indicating
audio/non-audio data at the RX input.
AINAUX - Auxiliary Line Level Input, PIN 15.
Analog signal input for the mono A/D converter.
Analog Outputs
AOUT1, AOUT2, AOUT3, AOUT4, AOUT5, AOUT6 - Audio Outputs, PINS 21 - 26.
The analog outputs from the 6 D/A converters. Each output can be independently controlled for
output amplitude.
CMOUT - Common Mode Output, PIN 16.
This common mode voltage output may be used for level shifting when DC coupling is desired.
The load on CMOUT must be DC only, with an impedance of not less than 50 kΩ. CMOUT
should be bypassed with a 1.0 µF to AGND.
Digital Audio Interface Signals
SDIN1 - Serial Data Input 1, PIN 34.
Digital audio data for the DACs 1 and 2 is presented to the CS4226 on this pin. This pin is also
used for one-line data input modes.
SDIN2 - Serial Data Input 2, PIN 33.
Digital audio data for the DACs 3 and 4 is presented to the CS4226 on this pin.
SDIN3 - Serial Data Input 3, PIN 32.
Digital audio data for the DACs 5 and 6 is presented to the CS4226 on this pin.
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