CS4271 datasheet(39/53 Pages) CIRRUS

39 / 53 page

CS4271

DS592F1

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

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.

654

AMUTE

FILT_SEL

DEM1

DEM0

RMP_UP

RMP_DN

INV_A

INV_B

Table 13. De-Emphasis Mode Selection

DEM1

DEM0

Description

Disabled (default)

44.1 kHz de-emphasis

48 kHz de-emphasis

32 kHz de-emphasis

Gain

-10dB

0dB

Frequency

T2 = 15 µs

T1=50 µs

3.183 kHz

10.61 kHz

Figure 19. De-Emphasis Curve

CS4271 Datasheet(PDF) 39 Page - Cirrus Logic

CS4271 Datasheet(HTML) 39 Page - Cirrus Logic

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53

Datasheet Download

Link URL