CS4244-CNZ Cirrus Logic Inc, CS4244-CNZ Datasheet - Page 37

• Manufacturer Part Number: CS4244-CNZ
• Description: IC 4 Input / 5 Output CODEC
• Manufacturer: Cirrus Logic Inc

DS900PP2
4.6.3
4.6.3.1
The CS4244 includes on-chip digital de-emphasis for 32, 44.1, and 48 kHz sample rates. It is not support-
ed for 96 kHz or for any settings in Double-speed Mode. The filter response is adjusted to be appropriate
for a particular base rate by the
if these bits are not set appropriately for the given base rate. The frequency response of the de-emphasis
curve scales proportionally with changes in sample rate, F
phasis
The de-emphasis feature is included to accommodate audio recordings that utilize 50/15 s pre-emphasis
equalization as a means of noise reduction.
DAC1-4 Path
The AOUT1-4 signals are driven by the data placed into the DAC1-4 path. This data can be placed into
the DAC1-4 path via the
source to be selected from any of the up to 32 slots of data on the incoming TDM streams on SDIN1 and
SDIN2.
The DAC1-4 path also includes individual channel mutes. Separate volume controls are available for each
channel, along with a master volume control that simultaneously attenuates all four channels. The master
volume attenuation is added to any channel attenuation that is applied.
AIN1 (±)
AIN2 (±)
AIN3 (±)
AIN4 (±)
for de-emphasis control.
1.8 to 5.0 VDC
VL
De-emphasis Filter
Multi-bit
 ADC
SDOUT1
Digital Filters
SDOUT2
DAC1-4 Data Source
Base Rate Advisory
Channel Volume ,
SDIN2
Mute, Invert ,
Noise Gate
Serial Audio Interface
SDIN1
Figure 26. DAC1-4 Path
2.5 V
2.5 VDC
Clock / LRCK
Frame Sync
VD
Volume
Master
Control
settings in the control port. These settings allow the input
Level Translator
LDO
bits. This filter response, shown in
Master Clock In
5.0 VDC
VA
Interpolation
S
Filter
Analog Supply
. Please see
Serial Clock
In/Out
Multi-bit 
Modulators
INT
Section 6.9.2 DAC1-4 De-em-
Control Port
RST
DAC &
Analog
Filters
I
2
C Control
Data
Figure
27, will vary
CS4244
AOUT1 (±)
AOUT2 (±)
AOUT3 (±)
AOUT4 (±)
37