CS42L50 datasheet(20/48 Pages) CIRRUS

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CS42L50

DS544PP1

4.1.11 Analog I/O Control (address 03h)

4.1.12 LEFT/RIGHT CHANNEL MUTE (MUTE)

Default = 0

0 - Disabled

1 - Enabled

Function:

Digital mute of the left and right ADC channels.

4.1.13 SOFT RAMP AND ZERO CROSS ENABLE (SOFT/ZC)

Default = 11

00 - Change volume immediately

01 - Change volume at next zero cross time

10 - Change volume in 1dB steps

11 - Change volume in 1dB steps at every zero cross time

Function:

Soft Ramp Enable :

Soft Ramp allows level changes, both muting and attenuation, to be implemented via an incremental

ramp. Digital volume control is ramped from the current level to the new level at a rate of 1/8 dB per

left/right clock period. Analog volume control is ramped in 1 dB steps every 8 left/right clock periods in

Single Speed mode, and 1dB every 16 left/right clock periods in Double Speed mode.

Zero Cross Enable :

Zero Cross enable dictates that signal level changes, either by attenuation changes or muting, will occur

on a signal zero crossing to minimize audible artifacts. The requested level change will occur after a tim-

eout period of 512 sample periods in Single Speed mode or 1024 sample periods in Double Speed mode

(approximately 10.7ms at 48kHz sample rate) if the signal does not encounter a zero crossing. The zero

cross function is independently monitored and implemented for each channel.

Soft Ramp and Zero Cross Enable :

Soft Ramp and Zero Cross enable dictates that signal level changes, either by attenuation changes or

muting, will occur in 1 dB steps and be implemented on a signal zero crossing. The level change will occur

after a timeout period of 512 sample periods in Single Speed mode or 1024 sample periods in Double

Speed mode (approximately 10.7 ms at 48kHz sample rate) if the signal does not encounter a zero cross-

ing. The zero cross function is independently monitored and implemented for each channel.

765

4321

MUTEL

MUTER

SZC1

SZC0

RESERVED

INDVC

L=R

HPFREEZE

001

1000

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