CS4222

DS236F1

5

Pin Name

#

Pin Description

NC

1,14,

15, 28

No Connect - These pins are not connected internally and should be tied to DGND to minimize noise

coupling.

SMUTE

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).

LRCK

4

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.

SCLK

5

Serial Data Clock (Input)- Clocks the individual bits of the serial data into the SDIN pin and out of the

SDOUT pin.

VD

6

Digital Power (Input)- Positive power supply for the digital section. Nominally 5.0 VDC.

DGND

7

Digital Ground (Input)- Digital ground for the digital section.

SDOUT

8

Serial Data Output (Output)- Two's complement MSB-first serial data is output on this pin.

SDIN

9

Serial Data Input (Input)- Two's complement MSB-first serial data is input on this pin.

SCL/CCLK

10

Serial Control Port Clock (Input)- Serial clock for the control port interface. This pin should be tied to

DGND in stand-alone mode.

SDA/CDIN

11

SPI mode. This pin should be tied to DGND in stand-alone mode.

AD0/CS

12

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.

DEM0

DEM1

13

18

De-emphasis Control (Input) - Selects the standard 15

µs/50µs digital de-emphasis filter response for

32, 44.1 and 48 kHz sample rate.

AINR-,

AINR+

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.

AINL-,

AINL+

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.

VA

21

Analog Power (Input)- Positive power supply for the analog section. Typically 5.0 VDC.

AGND

22

Analog Ground (Input)- Analog ground reference.

AOUTR-,

AOUTR+

23, 24 Differential Right Channel Analog Outputs (Output)- The full scale analog output level (differential) is

specified in the Analog Characteristics specification table.

AOUTL-,

AOUTL+

25, 26 Differential Left Channel Analog Outputs (Output)- The full scale analog output level (differential) is

specified in the Analog Characteristics specification table.

RST

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.