CS4398-CZZ【PDF 24/46 页】IC DAC 120DB 192KHZ W/VC 28TSSOP

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DS568F1

CS4398

DSD Mode: The relationship between the oversampling ratio of the DSD audio data and the required

Master Clock to DSD data rate is defined by the Digital Interface Format pins.

7.2.3

De-emphasis Control (DEM1:0) BITs 3-2.

Default = 0

00 - No De-emphasis

01 - 44.1 kHz De-emphasis

10 - 48 kHz De-emphasis

11 - 32 kHz De-emphasis

Function:

Selects the appropriate digital filter to maintain the stan-

dard 15

s/50 s digital de-emphasis filter response at 32,

44.1 or 48 kHz sample rates. (see Figure 17)

Notes: De-emphasis is only available in Single-Speed

Mode.

7.2.4

Functional Mode (FM1:0) BITs 1-0

Default = 00

00 - Single-Speed Mode (30 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 - Direct Stream Digital Mode

Function:

Selects the required range of input sample rates or DSD Mode.

7.3

Volume Mixing and Inversion Control - Register 03h

DIF2

DIF1

DIF0

Description

64x oversampled DSD data with a 4x MCLK to DSD data rate (Default)

64x oversampled DSD data with a 6x MCLK to DSD data rate

64x oversampled DSD data with a 8x MCLK to DSD data rate

64x oversampled DSD data with a 12x MCLK to DSD data rate

128x oversampled DSD data with a 2x MCLK to DSD data rate

128x oversampled DSD data with a 3x MCLK to DSD data rate

128x oversampled DSD data with a 4x MCLK to DSD data rate

128x oversampled DSD data with a 6x MCLK to DSD data rate

Table 6. Digital Interface Formats - DSD Mode

543

VOLB=A

INVERT A

INVERT B

ATAPI4

ATAPI3

ATAPI2

ATAPI1

ATAPI0

Gain

-10dB

0dB

Frequency

T2 = 15 s

T1=50 s

3.183 kHz

10.61 kHz

Figure 17. De-Emphasis Curve

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