CS53L32A datasheet(23/40 Pages) CIRRUS

23 / 40 page

CS53L32A

DS513F1

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 BRM or 1024 sample periods in HRM (ap-

proximately 10.7 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.

4.11

INDEPENDENT VOLUME CONTROL ENABLE

Analog I/O Control Register (address 03h)

Access:

R/W in Two Wire Mode and write only in SPI.

Default:

0 - Enabled

Function:

When this function is disabled, the AIN_L and AIN_R volume levels are controlled by the Left and

Right Volume Control registers and the Independent Analog Gain Control registers are ignored.

When this function is enabled, the volume levels are determined by both the Volume Control registers

and the Independent Analog Gain Control registers.

SOFT/ZC

ANALOG VOLUME CONTROL MODES

Change volume immediately

Change volume at next zero cross time

Change volume in 1 dB steps

Change volume in 1 dB steps at every zero cross time

Table 9. Analog Volume Control

SOFT

DIGITAL VOLUME CONTROL MODES

Change volume immediately

Change volume in1/8 dB steps

Table 10. Digital Volume Control

76543

210

MUTEL

MUTER

SOFT

RESERVED

INDVC

L=R

HPFREEZE

INDVC

MODE

Enabled

1Frozen

Table 11. Independent Volume Control Enable

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