CS42435-DMZ datasheet(45/58 Pages) CIRRUS

45 / 58 page

DS685F1

CS42435

Soft Ramp on Zero Crossing

Soft Ramp and Zero Cross Enable dictates that signal level changes, either by gain changes, attenuation

changes or muting, will occur in 1/8 dB steps and be implemented on a signal zero crossing. The 1/8 dB

level change will occur after a timeout period between 512 and 1024 sample periods (10.7 ms to 21.3 ms

at 48 kHz sample rate) if the signal does not encounter a zero crossing. The zero cross function is inde-

pendently monitored and implemented for each channel.

7.7.3

Auto-Mute (AMUTE)

Default = 1

0 - Disabled

1 - Enabled

Function:

The Digital-to-Analog converters of the CS42435 will mute the output following the reception of 8192 con-

secutive audio samples of static 0 or -1. A single sample of non-static data will release the mute. Detection

and muting is done independently for each channel. The quiescent voltage on the output will be retained

during the mute period. The muting function is affected, similar to volume control changes, by the Soft and

Zero Cross bits (SZC[1:0]).

7.7.4

Mute ADC Serial Port (MUTE ADC_SP)

Default = 0

0 - Disabled

1 - Enabled

Function:

When enabled, the ADC Serial Port will be muted.

7.8

DAC Channel Mute (Address 07h)

7.8.1

Independent Channel Mute (AOUTX_MUTE)

Default = 0

0 - Disabled

1 - Enabled

Function:

The respective Digital-to-Analog converter outputs of the CS42435 will mute when enabled. The quies-

cent voltage on the outputs will be retained. The muting function is affected by the DAC Soft and Zero

Cross bits (DAC_SZC[1:0]).

432

AOUT8_MUTE

AOUT7_MUTE

AOUT6_MUTE

AOUT5_MUTE

AOUT4_MUTE

AOUT3_MUTE

AOUT2_MUTE

AOUT1_MUTE

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