CS4399 datasheet(85/111 Pages) CIRRUS

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DS1113F1

CS4399

7.4 DSD Registers

7.4.4

DSD Interface Configuration

Address 0x70003

R/W

76543210

—

DSD_M/SB

DSD_PM_EN DSD_PM_SEL

Default

00000000

Bits

Name

Description

7:3

—

Reserved

DSD_M/SB

DSD clock master or Slave Mode.

0 (Default) Slave Mode

1 Master Mode

DSD_PM_EN DSD phase modulation mode. Can only be used when DSD_SPEED = 0 (64•Fs).

0 (Default) this function is disabled (DSD normal mode)

1 DSD phase modulation input mode is enabled, and the DSD_PM_SEL bit must be set accordingly.

DSD_PM_SEL DSD phase modulation mode select.

0 (Default) The 128•Fs (BCKA) clock must be input to DSD_SCLK for phase modulation mode.

1 The 64•Fs (BCKD) clock must be input to DSD_SCLK for phase modulation mode.

7.4.5

DSD Processor Path Signal Control 2

Address 0x70004

R/W

76543210

—

DSD_PRC_SRC

DSD_EN

—

DSD_SPEED STA_DSD_DET INV_DSD_DET

Default

00000010

Bits

Name

Description

7—

Reserved

6:5

DSD_PRC_

SRC

Select the source for DSD processor.

00 (Default) DSD interface

01 Reserved

10 ASP

11 XSP

DSD_EN

Enable DSD playback.

0 (Default) Function disabled

1 DSD playback is enabled

3—

Reserved

DSD_SPEED Setup DSD clock speed.

0 (Default) 64•Fs

1 128•Fs

1STA_DSD_

DET

Static DSD detection.

0 Function disabled

1 (Default) Static DSD detection is enabled. The DSD processor checks for 28 consecutive zeros or ones and, if

detected, sets the DSD_STUCK_INT interrupt status bit and mutes the output until the static condition is cleared.

0INV_DSD_

DET

Invalid DSD detection.

0 (Default) Function disabled

1 Invalid DSD detection is enabled. The DSD processor checks for 25 out of 28 bits of the same value and, if

detected, sets the DSD_INVAL_A_INT and/or DSD_INVAL_B_INT interrupt status bits.

7.4.6

DSD and PCM Mixing Control

Address 0x70005

R/W

76543210

—

MIX_PCM_

PREP

MIX_PCM_

DSD

Default

00000000

Bits

Name

Description

7:2

—

Reserved

1MIX_PCM_

PREP

Enable PCM playback path for PCM and DSD mixing. This bit must be set prior to setting MIX_PCM_DSD. Disable this

bit after disabling MIX_PCM_DSD. This mode requires DSD_EN to be enabled and DSD_PRC_SRC set to receive DSD

through either the DSD interface or XSP.

0 (Default) Function disabled

1 Enable PCM playback path for PCM and DSD mixing

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