CS44800 datasheet(17/80 Pages) CIRRUS

17 / 80 page

DS632F1

CS44800

PS_SYNC

Power Supply Synchronization Clock (Output) - The PWM synchronized clock to the

switch mode power supply.

XTI

Crystal Oscillator Input (Input) - Crystal Oscillator input or accepts an external clock

input signal that is used to drive the internal PWM core logic.

XTO

Crystal Oscillator Output (Output) - Crystal Oscillator output.

SYS_CLK

External System Clock (Output) - Clock output. This pin provides a divided down clock

derived from the XTI input.

DAI_MCLK

Digital Audio Input Master Clock (Input) - Master audio clock.

DAI_SCLK

Digital Audio Input Serial Clock (Input) - Serial clock for the Digital Audio Input Inter-

face. The clock frequency is a multiple of the Left/Right Clock running at Fs.

DAI_LRCK

Digital Audio Input Left/Right Clock (Input) - Determines which channel, Left or Right,

is currently active on the serial audio data line. The rate is determined by the sampling fre-

quency Fs.

DAI_SDIN1

DAI_SDIN2

DAI_SDIN3

DAI_SDIN4

Digital Audio Input Serial Data (Input) - Input for two’s complement serial audio data.

MUTE

Mute (Input) - The device will perform a hard mute on all channels. All internal registers

are not reset to their default settings.

SCL/CCLK

Serial Control Port Clock (Input) - Serial clock for the serial control port. Requires an

external pull-up resistor to the logic interface voltage in I²C mode as shown in the Typical

Connection Diagram.

SDA/CDOUT

Serial Control Data (Input/Output) - SDA is a data I/O line in I²C mode and requires an

external pull-up resistor to the logic interface voltage, as shown in the Typical Connection

Diagram.; CDOUT is the output data line for the control port interface in SPI mode.

AD1/CDIN

Address Bit 1 (I²C)/Serial Control Data (SPI) (Input) - AD1 is a chip address pin in I²C

mode.;CDIN is the input data line for the control port interface in SPI mode.

AD0/CS

Address Bit 0 (I²C)/Control Port Chip Select (SPI) (Input) - AD0 is a chip address pin in

I²C mode; CS is the chip select signal in SPI mode.

INT

Interrupt Request (Output) - CMOS or open-drain interrupt request output. This pin is

driven to the configured active state to indicate that the PWM Controller has status data

that should be read by the host.

RST

Reset (Input) - The device enters a low power mode and all internal registers are reset to

their default settings when low.

GPIO6

General Purpose Input, Output (Input/Output) - This pin is configured as an input follow-

ing a RST condition. It can be configured as a general purpose input or output which can

be individually controlled by the Host Controller.

GPIO5

General Purpose Input, Output (Input/Output) - This pin is configured as an input follow-

ing a RST condition. It can be configured as a general purpose input or output which can

be individually controlled by the Host Controller.

GPIO4

General Purpose Input, Output (Input/Output) - This pin is configured as an input follow-

ing a RST condition. It can be configured as a general purpose input or output which can

be individually controlled by the Host Controller.

GPIO3

General Purpose Input, Output (Input/Output) - This pin is configured as an input follow-

ing a RST condition. It can be configured as a general purpose input or output which can

be individually controlled by the Host Controller.

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