CS42516 datasheet(57/90 Pages) CIRRUS

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DS583F1

CS42516

occur on a signal zero crossing to minimize audible artifacts. The requested 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 independently mon-

itored and implemented for each channel.

Soft Ramp

Soft Ramp allows level changes, both muting and attenuation, to be implemented by incrementally

ramping, in 1/8 dB steps, from the current level to the new level at a rate of 1 dB per 8 left/right clock

periods.

Soft Ramp on Zero Crossing

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

independently monitored and implemented for each channel.

6.11.3

AUTO-MUTE (AMUTE)

Default = 1

0 - Disabled

1 - Enabled

Function:

The digital-to-analog converters of the CS42516 will mute the output following the reception of 8192

consecutive 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, and the MUTEC pin will go active during the mute period. The muting function is af-

fected, similar to volume control changes, by the Soft and Zero Cross bits (SZC[1:0]).

6.11.4 SERIAL AUDIO INTERFACE SERIAL PORT MUTE (MUTE SAI_SP)

Default = 0

0 - Disabled

1 - Enabled

Function:

When enabled, the Serial Audio Interface port (SAI_SP) will be muted.

6.11.5 SOFT VOLUME RAMP-UP AFTER ERROR (RMP_UP)

Default = 0

0 - Disabled

1 - Enabled

Function:

An un-mute will be performed after executing a filter mode change, after a MCLK/LRCK ratio change

or error, and after changing the Functional Mode. When this feature is enabled, this un-mute is affect-

ed, similar to attenuation changes, by the Soft and Zero Cross bits (SZC[1:0]). When disabled, an

immediate un-mute is performed in these instances.

Note:

For best results, it is recommended that this bit be used in conjunction with the RMP_DN bit.

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