Owner's manual

CS4391A

24 DS600PP3

Serial Control Interface Clock - SCL/CCLK (Control Port Mode)

Pin 8, Input

Function:

Clocks the serial control data into or from SDA/CDIN.

Serial Control Data I/O - SDA/CDIN (Control Port Mode)

Pin 9, Input/Output

Function:

In I

C mode, SDA is a data I/O line. CDIN is the input data line for the control port interface in SPI mode.

Address Bit / Chip Select - AD0 / CS

(Control Port Mode)

Pin 10, Input

Function:

In I

C mode, AD0 is a chip address bit. CS is used to enable the control port interface in SPI mode. The

device will enter the SPI mode at anytime a high to low transition is detected on this pin. Once the device

has entered the SPI mode, it will remain until either the part is reset or undergoes a power-down cycle.

Positive Voltage Reference - FILT+

Pin 11, Output

Function:

Positive reference for internal sampling circuits. External capacitors are required from FILT+ to analog

ground, as shown in Figures 5 and 6. The recommended values will typically provide 60 dB of PSRR at

1 kHz and 40 dB of PSRR at 60 Hz. FILT+ is not intended to supply external current. FILT+ has a typical

source impedance of 250 kΩ and any current drawn from this pin will alter device performance.

Common Mode Voltage - CMOUT

Pin 12, Output

Function:

Filter connection for internal common mode reference voltage, typically 50% of VA. Capacitors must be

connected from CMOUT to analog ground, as shown in Figures 5 and 6. CMOUT is not intended to supply

external current. CMOUT has a typical source impedance of 250 kΩ and any current drawn from this pin

will alter device performance.

Channel A and Channel B Mute Control - AMUTEC and BMUTEC

Pins 13 and 20, Outputs

Function:

The Mute Control pins go high during power-up initialization, reset, muting, master clock to left/right clock

frequency ratio is incorrect or power-down. These pins are intended to be used as a control for an external

mute circuit to prevent the clicks and pops that can occur in any single supply system. Use of Mute Control

is not mandatory but recommended for designs requiring the absolute minimum in extraneous clicks and

pops.