CDB4385 datasheet(39/56 Pages) CIRRUS

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CS4385

DS671A1

5.3

PCM Control (address 03h)

5.3.1

DIGITAL INTERFACE FORMAT (DIF)

Default = 0000 - Format 0 (Left Justified, up to 24-bit data)

Function:

These bits select the interface format for the serial audio input. The DSD/PCM bit determines whether

PCM or DSD mode is selected.

The required relationship between the Left/Right clock, serial clock and serial data is defined by the Digital

Interface Format and the options are detailed in Figures 9-19.

5.3.2

FUNCTIONAL MODE (FM)

Default = 11

00 - Single-Speed Mode (4 to 50 kHz sample rates)

01 - Double-Speed Mode (50 to 100 kHz sample rates)

10 - Quad-Speed Mode (100 to 200 kHz sample rates)

11 - Auto Speed Mode detect (32 kHz to 200 kHz sample rates)

Function:

Selects the required range of input sample rates or Auto Speed Mode.

654

DIF3

DIF2

DIF1

DIF0

Reserved

FM1

FM0

000

DIF3

DIF2

DIF1

DIF0

DESCRIPTION

Format

FIGURE

Left Justified, up to 24-bit data

I2S, up to 24-bit data

110

Right Justified, 16-bit data

211

Right Justified, 24-bit data

312

Right Justified, 20-bit data

413

Right Justified, 18-bit data

514

One-line Mode 1, 24-bit Data +SDIN4

815

One-line Mode 2, 20-bit Data +SDIN4

916

One-line Mode 3, 24-bit 6-channel

One-line Mode 4, 20-bit 6-channel

TDM

All other combinations are Reserved

Table 7. Digital Interface Formats - PCM Mode

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