Cirrus-logic CS4362A Manual de usuario descargar pdf (Pagina 37)

DS617F2 37

CS4362A

6.3.6 Mute Pin Control (MUTEC1, MUTEC0)

Default = 00

00 - Six mute control signals

01, 10 - One mute control signal

11 - Three mute control signals

Function:

Selects how the internal mute control signals are routed to the MUTEC1 through MUTEC6 pins. When

set to ‘00’, there is one mute control signal for each channel: AOUT1A on MUTEC1, AOUT1B on

MUTEC2, etc. When set to ‘01’ or ‘10’, there is a single mute control signal on the MUTEC1 pin. When

set to ‘11’, there are three mute control signals, one for each stereo pair: AOUT1A and AOUT1B on

MUTEC1, AOUT2A and AOUT2B on MUTEC2, and AOUT3A and AOUT3B on MUTEC3.

6.4 Filter Control (Address 04h)

6.4.1 Interpolation Filter Select (FILT_SEL)

Default = 0

0 - Fast roll-off

1 - Slow roll-off

Function:

This function allows the user to select whether the interpolation filter has a fast or slow roll off. For filter

characteristics, please see Section 2.

6.4.2 De-Emphasis Control (DEM)

Default = 00

00 - Disabled

01 - 44.1 kHz

10 - 48 kHz

11 - 32 kHz

Function:

Selects the appropriate digital filter to maintain the standard 15

µs/50 µs digital de-emphasis filter re-

sponse at 32, 44.1 or 48 kHz sample rates. (see Figure 13)

De-emphasis is only available in Single-Speed Mode.

6.4.3 Soft Ramp-Down Before Filter Mode Change (RMP_DN)

Default = 0

0 - Disabled

1 - Enabled

Function:

If either the FILT_SEL or DEM bits are changed, the DAC will stop conversion for a period of time to

change filter values. This bit selects how the data is effected prior to and after the change of the filter val-

76543210

Reserved Reserved Reserved FILT_SEL Reserved DEM1 DEM0 RMP_DN

00000000

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 49 50

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Cirrus-logic CS4362A Manual de usuario Pagina 37