CS43L21-CNZ 查看數據表（PDF） - Cirrus Logic

零件编号

产品描述 (功能)

生产厂家

CS43L21-CNZ

Low Power, Stereo Digital to Analog Converter

Cirrus Logic 

CS43L21

Soft Ramp

Soft Ramp allows level changes, either by gain changes, attenuation changes or muting, to be implemented

by incrementally ramping, in 1/8 dB steps, from the current level to the new level at a rate of 0.5 dB per 4

left/right clock periods.

Soft Ramp on Zero Crossing

This setting 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 independently monitored and im-

plemented for each channel. Note: The LIM_SRDIS bit is ignored.

6.7 PCMX Mixer Volume Control:

PCMA (Address 10h) & PCMB (Address 11h)

7

MUTE_

PCMMIXx

6

PCMMIXx_

VOL6

5

PCMMIXx_

VOL5

4

PCMMIXx_

VOL4

3

PCMMIXx_

VOL3

2

PCMMIXx_

VOL2

1

PCMMIXx_

VOL1

0

PCMMIXx_

VOL0

Note: The DATA_SEL[1:0] bits in reg09h must be set to ‘01’b to enable function control in this register.

PCMX Mixer Channel Mute (MUTE_PCMMIXX)

Default = 1

0 - Disabled

1 - Enabled

Function:

The PCM channel X input to the output mixer will mute when enabled. The muting function is affected by

the DACX Soft and Zero Cross bits (DACX_SZC[1:0]).

PCMX Mixer Volume Control (PCMMIXX_VOL[6:0])

Default: 000 0000

Binary Code

001 1000

···

000 0000

111 1111

111 1110

···

001 1001

Volume Setting

+12.0 dB

···

0 dB

-0.5 dB

-1.0 dB

···

-51.5 dB

Function:

The level of the PCMX input to the output mixer can be adjusted in 0.5 dB increments as dictated by the

DACX Soft and Zero Cross bits (DACX_SZC[1:0]) from +12 to -51.5 dB. Levels are decoded as described

in the table above.

44

DS723A1

Share Link: