CS42406 datasheet(41/50 Pages) CIRRUS

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CS42406

Note: All registers are read/write in I²C mode and write only in SPI, unless otherwise stated.

6.1

MODE CONTROL 1 (ADDRESS 01H)

6.1.1

AUTO-MUTE (AMUTE) BIT 7

Default = 1

0 - Disabled

1 - Enabled

Function:

The CS42406 DAC output will mute following the reception of 8192 consecutive audio samples of

static 0 or -1. A single sample of non-static data will release the mute. Detection and muting is done

independently for each channel. The quiescent voltage on the output will be retained and the Mute

Control pin will go active during the mute period. The muting function is affected, similar to volume

control changes, by the Soft and Zero Cross bits in the Power and Muting Control register.

6.1.2

DIGITAL INTERFACE FORMAT (DIF) BIT 6-4

Default = 000 - Format 0 (Left Justified, up to 24-bit data)

Function:

The required relationship between the DAC_LRCK, DAC_SCLK, and SDINx is defined by the Digital

Interface Format and the options are detailed in Figures 28-30.

76543

210

AMUTE

DIF2

DIF1

DIF0

DEM1

DEM0

FM1

FM0

10000

000

DIF2

DIF1

DIF0

DESCRIPTION

Format

FIGURE

000

Left Justified, up to 24-bit data

028

001

I²S, up to 24-bit data

129

010

Right Justified, 16-bit data

230

011

Right Justified, 24-bit data

330

100

Right Justified, 20-bit data

430

101

Right Justified, 18-bit data

530

110

Reserved

111

Reserved

Table 7. Digital Interface Formats - Control Port Mode

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