CS4226 Datasheet, PDF (31/60 Pages) Cirrus Logic – Surround Sound Codec

CS4226
SDOUT1- Serial Data Output 1, PIN36.
Digital audio data from the 20-bit stereo audio ADCs is output from this pin. When IS = 1 or 2,
DATAAUX or the S/PDIF receiver is output on SDOUT1. This pin is also used for one line
data output modes.
SDOUT2 - Serial Data Output 2, PIN 35.
Digital audio data from the mono audio ADC is output from this pin. When IS = 2, the stereo
audio ADC’s are output from this pin
SCLK - Serial Port Clock I/O, PIN 38.
SCLK clocks digital audio data into the DACs via SDIN1/2/3, and clocks data out of the ADCs
on SDOUT1/2. Active clock edge depends on the DSCK bit.
LRCK - Left/Right Select Signal I/O, PIN 37.
The Left/Right select signal. This signal has a frequency equal to the sample rate. The
relationship of LRCK to the left and right channel data depends on the selected format.
DEM - De-emphasis Control, PIN 27.
When low, DEM controls the activation of the standard 50/15 µs de-emphasis filter for either
32, 44.1, or 48 kHz sample rates. This pin is enabled by the DEM2-0 bits in the Auxiliary Port
Control Byte.
OVL/ERR - Overload Indicator, PIN 30.
This pin goes high if either of the stereo audio ADCs or the mono ADC is clipping. If the
S/PDIF receiver is chosen as the clock source (CS = 4, 5, 6, 7), then the pin also goes high if
there is an error in the Receiver Status Byte. Error and overloading can be masked using bits in
the Input Control Byte.
Auxillary Digital Audio and S/PDIF Receiver Signals
RX1 - Receiver Channel 1, PIN 42.
This pin is a dedicated S/PDIF input channel configured as the clock source for the device via
the CS2-0 bits.
DATAUX/RX4 - Auxiliary Data Input / Receiver Channel 4, PIN 1.
DATAUX is the auxiliary audio data input line, usually connected to an external digital audio
source. As RX4, this pin is configured as S/PDIF input channel 4 via the control port.
LRCKAUX/RX3 - Auxiliary Word Clock Input or Output / Receiver Channel 3, PIN 44.
In auxiliary slave mode, LRCKAUX is a word clock (at Fs) from an external digital audio
source. LRCKAUX can be used as the clock reference for the internal PLL. In auxiliary master
mode, LRCKAUX is a word clock output (at Fs) to clock an external digital audio source. As
RX3, this pin is configured as S/PDIF input channel 3 via the control port.
DS188F1
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