CS4272-DZZ Datasheet, PDF (39/53 Pages) Cirrus Logic – 24-Bit, 192 kHz Stereo Audio CODEC

CS4272
8.2 DAC Control - Address 02h
7
AMUTE
6
FILT_SEL
5
DEM1
4
DEM0
3
RMP_UP
2
RMP_DN
1
INV_A
0
INV_B
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 µs 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.
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
T1=50 µs
0dB
-10dB
T2 = 15 µs
F1
3.183 kHz
F2 Frequency
10.61 kHz
Figure 19. De-Emphasis Curve
DS593F1
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