CS42526 datasheet(49/90 Pages) CIRRUS

49 / 90 page

DS585PP5

CS42526

in the Receiver Mode Control (address 1Eh) register to set the appropriate sample rate.

6.4.5

RECEIVER DE-EMPHASIS CONTROL (RCVR_DEM)

Default = 0

Function:

When enabled, de-emphasis will be automatically applied when emphasis is detected based on the

channel status bits. The appropriate digital filter will be selected to maintain the standard 15

µs/50µs

digital de-emphasis filter response at the auto-detected sample rate of either 32, 44.1, or 48 kHz. If

the FRC_PLL_LK bit is set to a ‘1’b, then the auto-detect sample rate feature is disabled. To apply

the correct de-emphasis filter, use the DE-EMPH bits in the Receiver Mode Control (address 1Eh)

6.5

Interface Formats (address 04h)

6.5.1

DIGITAL INTERFACE FORMAT (DIFX)

Default = 01

Function:

These bits select the digital interface format used for the CODEC Serial Port and Serial Audio Interface

Port when not in one_line mode. 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 11-12.

DAC_DEM

reg03h[1]

FRC_PLL_LK

reg06h[0]

DE-EMPH[1:0]

reg1Eh[5:4]

De-Emphasis

Mode

No De-Emphasis

Auto-Detect Fs

Reserved

32 kHz

44.1 kHz

48 kHz

Table 5. DAC De-Emphasis

RCVR_DEM

reg03h[0]

FRC_PLL_LK

reg06h[0]

DE-EMPH[1:0]

reg1Eh[5:4]

De-Emphasis

Mode

No De-Emphasis

Auto-Detect Fs

Reserved

32 kHz

44.1 kHz

48 kHz

Table 6. Receiver De-Emphasis

654

DIF1

DIF0

ADC_OL1

ADC_OL0

DAC_OL1

DAC_OL0

SAI_RJ16

CODEC_RJ16

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