CS42432_06 Datasheet, PDF (44/59 Pages) Cirrus Logic – 108 dB, 192 kHz 4-In, 6-Out TDM CODEC

CS42432
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 CS42432 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
Reserved
6
Reserved
5
4
3
2
1
0
AOUT6_MUTE AOUT5_MUTE AOUT4_MUTE AOUT3_MUTE AOUT2_MUTE AOUT1_MUTE
7.8.1
Independent Channel Mute (AOUTX_MUTE)
Default = 0
0 - Disabled
1 - Enabled
Function:
The respective Digital-to-Analog converter outputs of the CS42432 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]).
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