CS4222
Pin Name
NC
SMUTE
#
Pin Description
1,14,
No Connect -
These pins are not connected internally and should be tied to DGND to minimize noise
15, 28 coupling.
2
Soft Mute (Input) -
Activates a muting function for both the left and right channel D/A converter outputs.
Soft muting is achieved by ramping down the volume in 0.5 dB steps until achieving mute if SOFT bit
(DAC Control Byte #2) is set to 0 (default).
Left/Right Clock (Input) -
Determines which channel is currently being input/output of the serial audio
data pins SDIN/SDOUT. The frequency of the Left/Right clock must be equal to the input sample rate.
Although the outputs for each ADC channel are transmitted at different times, Left/Right pairs represent
simultaneously sampled analog inputs.
Serial Data Clock (Input) -
Clocks the individual bits of the serial data into the SDIN pin and out of the
SDOUT pin.
Digital Power (Input) -
Positive power supply for the digital section. Nominally 5.0 VDC.
Digital Ground (Input) -
Digital ground for the digital section.
Serial Data Output (Output) -
Two's complement MSB-first serial data is output on this pin.
Serial Data Input (Input) -
Two's complement MSB-first serial data is input on this pin.
Serial Control Port Clock (Input) -
Serial clock for the control port interface. This pin should be tied to
DGND in stand-alone mode.
Serial Control Port Data (Input/Output) -
SDA is a data I/O line in I
2
C mode and requires an external
pull-up resistor according to the I
2
C specification. CDIN in the input data line for the serial control port in
SPI mode. This pin should be tied to DGND in stand-alone mode.
LRCK
4
SCLK
VD
DGND
SDOUT
SDIN
SCL/CCLK
SDA/CDIN
5
6
7
8
9
10
11
AD0/CS
12
Address Bit/Control Chip Select (Input) -
In I
2
C mode, AD0 is a chip address bit. In SPI mode, CS is
used to enable the control port interface on the CS4222. The CS4222 will enter SPI mode if a negative
transition is ever seen on this pin after power up. This pin should be tied to DGND in stand-alone mode.
De-emphasis Control (Input)
- Selects the standard 15µs/50µs digital de-emphasis filter response for
32, 44.1 and 48 kHz sample rate.
DEM0
DEM1
AINR-,
AINR+
AINL-,
AINL+
VA
AGND
AOUTR-,
AOUTR+
AOUTL-,
AOUTL+
RST
13
18
16,17
Differential Right Channel Analog Input (Input) -
Analog input connections of the right channel differ-
ential inputs. Typically 2 Vrms differential (1 Vrms for each input pin) for a fullscale analog input signal.
19,20
Differential Left Channel Analog Input (Input) -
Analog input connections of the left channel differential
inputs. Typically 2 Vrms differential (1 Vrms for each input pin) for a fullscale analog input signal.
21
22
Analog Power (Input) -
Positive power supply for the analog section. Typically 5.0 VDC.
Analog Ground (Input) -
Analog ground reference.
23, 24
Differential Right Channel Analog Outputs (Output) -
The full scale analog output level (differential) is
specified in the Analog Characteristics specification table.
25, 26
Differential Left Channel Analog Outputs (Output) -
The full scale analog output level (differential) is
specified in the Analog Characteristics specification table.
27
Reset (Input)
- When low, the device enters a low power mode and all internal registers are reset,
including the control port. When high, the control port becomes operational and normal operation will
occur.
DS236F1
5
CIRRUS [ CIRRUS LOGIC ]
