CS4272-CZZR Cirrus Logic Inc, CS4272-CZZR Datasheet - Page 39

• Manufacturer Part Number: CS4272-CZZR
• Description: IC,Soundcard Circuits,TSSOP,28PIN,PLASTIC
• Manufacturer: Cirrus Logic Inc

8.2
8.2.1
8.2.2
8.2.3
DS593F1
AMUTE
7
DAC Control - Address 02h
Function:
Function:
Function:
Auto-Mute (Bit 7)
Interpolation Filter Select (Bit 6)
De-Emphasis Control (Bits 5:4)
When set, enables the Auto-Mute function. See “Auto-Mute” on page 30.
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.
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.
FILT_SEL
6
DEM1
DEM1
-10dB
0
0
1
1
Gain
5
0dB
Table 13. De-Emphasis Mode Selection
dB
Figure 19. De-Emphasis Curve
DEM0
0
1
0
1
DEM0
3.183 kHz
T1=50 µs
4
F1
Disabled (default)
44.1 kHz de-emphasis
48 kHz de-emphasis
32 kHz de-emphasis
RMP_UP
Description
3
10.61 kHz
F2
T2 = 15 µs
Frequency
RMP_DN
2
INV_A
1
CS4272
INV_B
0
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