CS42448 datasheet(47/70 Pages) CIRRUS

47 / 70 page

DS648PP2

6.5

INTERFACE FORMATS (ADDRESS 04H)

6.5.1

FREEZE CONTROLS (FREEZE)

Default = 0

Function:

This function will freeze the previous settings of, and allow modifications to be made to the channel

mutes, the DAC and ADC Volume Control/Channel Invert registers without the changes taking effect

until the FREEZE is disabled. To have multiple changes in these control port registers take effect si-

multaneously, enable the FREEZE bit, make all register changes, then disable the FREEZE bit.

6.5.2

AUXILIARY DIGITAL INTERFACE FORMAT (AUX_DIF)

Default = 0

0 - Left Justified

1 - I²S

Function:

This bit selects the digital interface format used for the AUX Serial Port. The required relationship be-

tween the Left/Right clock, serial clock and serial data is defined by the Digital Interface Format and

the options are detailed in Figures 21-22.

6.5.3

DAC DIGITAL INTERFACE FORMAT (DAC_DIF[2:0])

Default = 110

Function:

These bits select the digital interface format used for the DAC Serial Port. The required relationship be-

tween the Left/Right clock, serial clock and serial data is defined by the Digital Interface Format and

the options are detailed in the section “CODEC Digital Interface Formats” on page 32.

Refer to Table 9. “Serial Audio Interface Channel Allocations” on page 36.

Ratio (xFs)

MFreq2

MFreq1

MFreq0

Description

SSM

DSM

QSM

1.0290 MHz to 12.8000 MHz

256

N/A

1.5360 MHz to 19.2000 MHz

384

N/A

2.0480 MHz to 25.6000 MHz

512

256

N/A

3.0720 MHz to 38.4000 MHz

768

384

N/A

4.0960 MHz to 51.2000 MHz

1024

512

256

Table 11. MCLK Frequency Settings for TDM & OLM Interface Formats

654

FREEZE

AUX_DIF

DAC_DIF2

DAC_DIF1

DAC_DIF0

ADC_DIF2

ADC_DIF1

ADC_DIF0

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