參數(shù)資料
型號: CDB4272
廠商: Cirrus Logic, Inc.
元件分類: Codec
英文描述: 24-Bit, 192 kHz Stereo Audio CODEC
中文描述: 24位192千赫立體聲音頻CODEC
文件頁數(shù): 39/53頁
文件大?。?/td> 1200K
代理商: CDB4272
CS4272
DS593F1
39
8.2
DAC Control - Address 02h
8.2.1
Auto-Mute (Bit 7)
Function:
When set, enables the Auto-Mute function. See “Auto-Mute” on page 30.
8.2.2
Interpolation Filter Select (Bit 6)
Function:
This Function allows the user to select whether the Interpolation Filter has a fast or slow roll off. When
set, this bit selects the slow roll off filter, when cleared it selects the fast roll off filter. The - 3 dB corner
is approximately the same for both filters, but the slope of the roll off is greater for the fast roll off filter.
8.2.3
De-Emphasis Control (Bits 5:4)
Function:
Implementation of the standard 50/15
μ
s digital de-emphasis filter response, Figure 19, 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 Table 13 below.
7
6
5
4
3
2
1
0
AMUTE
FILT_SEL
DEM1
DEM0
RMP_UP
RMP_DN
INV_A
INV_B
Table 13. De-Emphasis Mode Selection
DEM1
0
0
1
1
DEM0
0
1
0
1
Description
Disabled (default)
44.1 kHz de-emphasis
48 kHz de-emphasis
32 kHz de-emphasis
Gain
dB
-10dB
0dB
Frequency
T2 = 15 μs
T1=50 μs
F1
F2
3.183 kHz
10.61 kHz
Figure 19. De-Emphasis Curve
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