CS44210 datasheet(27/38 Pages) CIRRUS

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CS44210

DS539PP1

5. PIN DESCRIPTION

Serial Data 2

SDIN2

SDIN3

Serial Data 3

Serial Data 1

SDIN1

RST

Reset

Left/Right Clock

LRCK

GND

Headphone B Ground

Serial Clock

SCLK

HP_B

Headphone B Output

Master Clock

MCLK

VA_HPB

Headphone B Power

Digital Power

VA_HPA

Headphone A Power

Ground

GND

HP_A

Headphone A Output

Interface Power

GND

Headphone A Ground

SCL/CCLK/DIF0 SCL/CCLK/DIF0

SDA/CDIN/DEM SDA/CDIN/DEM

Addr0/ChipSel/DIF1

AD0/CS/DIF1

AD1/CDOUT

Addr1/CDOUT

Sync Clock

SYNC_CLK

DRIVER_A

Driver Output A

Test In

TSTIN

DRIVER_B

DriverOutput B

SDIN1

SDIN2

SDIN3

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

should be grounded.

LRCK

Left Right Clock (Input) - Determines which channel, Left or Right, is currently active on the

serial audio data line. The frequency of the left/right clock must be at the audio sample rate, Fs.

SCLK

Serial Clock (Input) - Serial clock for the serial audio interface.

MCLK

Master Clock (Input) - Clock source for the PWM modulator and digital filters. Table 11, 12, 13

and 14 illustrate several standard audio sample rates and the required master clock frequen-

cies.

Digital Power (Input) - Positive power supply for the digital section. Refer to "Recommended

Operating Conditions" for appropriate voltages.

GND

7, 17

& 22

Ground (Input) - Ground Reference.

Logic Power (Input) - Determines the required signal level for the digital input/output. Refer to

"Recommended Operating Conditions" for appropriate voltages.

Sync Clock

SYNC_CLK (Output) - Provides a high frequency clock signal at 32 x PWM switching frequency

to synchronize external circuitry, if needed.

TSTIN

Test In (Input) - This pin is not used and must remaing floating.

DRIVER_A

DRIVER_B

DRIVER OUTPUTS(Outputs) Outputs used to drive external power devices.

HP_A

HP_B

Headphone Outputs (Output) - PWM Headphone Outputs. An external LC filter should be

added to suppress high frequency switching noise. A DC blocking capacitor is also required.

Refer to Typical Connection Diagrams.

VA_HPA

VA_HPB

Headphone Amplifier Power (Input) - Positive power supply for the headphone amplifier.

Refer to "Recommended Operating Conditions" for appropriate voltages.

RST

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

default settings when low. The control port cannot be accessed when Reset is low. See Sec-

tion 6.5

Control Port

Definitions

SCL/CCLK

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

pull-up resistor to VL in Two-Wire mode.

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