CS4392(2002) 查看數據表（PDF） - Cirrus Logic
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CS4392 Datasheet PDF : 42 Pages
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CS4392
DIF2
0
0
0
0
1
1
1
1
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. Note that the Functional
Mode registers must be set to DSD Mode. See 9 for register options.
DIF1
0
0
1
1
0
0
1
1
DIFO
0
1
0
1
0
1
0
1
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 9. Digital Interface Formats - DSD Mode
6.1.3 De-Emphasis Control (Bits 3:2)
Function:
Implementation of the standard 15 µs/50 µs digital de-emphasis filter response, Figure 7, requires re-
configuration of the digital filter to maintain the proper filter response for 32, 44.1 or 48 kHz sample
rates. NOTE: De-emphasis is available only in Single-Speed Mode. See 10 below.
DEM1
0
0
1
1
DEMO
0
1
0
1
DESCRIPTION
Disabled (default)
44.1 kHz de-emphasis
48 kHz de-emphasis
32 kHz de-emphasis
Table 10. De-Emphasis Mode Selection
Gain
dB
0dB
-10dB
T1=50 µs
T2 = 15 µs
F1
3.183 kHz
F2 Frequency
10.61 kHz
Figure 10. De-Emphasis Curve
6.1.4 Functional Mode (Bits 1:0)
Function:
Selects the required range of input sample rates or DSD Mode. See Table 11.
FM1
0
0
1
1
FM0
0
1
0
1
MODE
Single-Speed Mode: 4 to 50 kHz sample rates
(default)
Double-Speed Mode: 50 to 100 kHz sample rates
Quad-Speed Mode: 100 to 200 kHz sample rates
Direct Stream Digital Mode
Table 11. Functional Mode Selection
DS459PP2
19
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