CS4610 CIRRUS [Cirrus Logic], CS4610 Datasheet - Page 16

• Manufacturer Part Number: CS4610
• Description: CrystalClear SoundFusion PCI Audio Accelerator
• Manufacturer: CIRRUS [Cirrus Logic]

DACs to expand the audio output capability to six
channels. This expanded output capability is useful
for applications where discrete 5.1 channel output
is desired for Dolby AC-3 audio programs. The
connection diagram for the additional CS4333
DACs is given in Figure 11. The CS4333 DACs
share the SCLK output from the CS423x with the
CS4610. The CS4333 DACs also receive a 16.9344
MHz MCLK signal from the CS423x. Note that the
CS423x MCLK output has limited drive strength
and should be buffered in this application. The LR-
CLK framing clock and the SDO2/SDO3 digital
audio outputs are provided from the CS4610. The
SDO2 and SDO3 transitions occur on falling edges
of SCLK (the primary output SDOUT transitions
on rising edges of SCLK). LRCLK transitions oc-
cur on falling edges of SCLK, with the LRCLK
high phase indicating left channel data present on
SDO2/SDO3. SDO2/SDO3 data is right justified,
with 16 bits of zero pad followed by 16-bits of data,
SCLK
FSYNC
SDOUT
SDIN
Pin Name Direction
16
FSYNC
SCLK
SDOUT
SDIN
Output
Input
Input
Input
Table 3. Serial Audio Port Signal Summary for CS4610/11 + CS423x Configuration
Figure 10. Serial Audio Port Format for CS4610/11 + CS423x Configuration
15
15 14 13
ADC 16 Clocks
Main timing driver for digital audio link, both edges used internally for timing. Also functions
as the source to the PLL for internal clock generation.
Framing signal for digital audio link, high time indicates left channel data and low time indi-
cates right channel data. Frame is sampled on the falling edge of the SCLK input.
Primary output port serial data pin. This data is the CS4610/11 output stream going to the
CS423x device. The serial data on this pin transitions on the rising edge of the SCLK input.
Primary input port serial data pin. This data contains both CS423x ADC data and the CS423x
output data. The serial data on this pin is sampled on the falling edge of the SCLK input.
DAC 16 Clocks
14 13
...
...
Left Data
0
0
15 14
DAC 16 Clocks
...
13
CrystalClear™ SoundFusion™ PCI Audio Accelerator
...
Functional Description
0
transmitted MSB first. There are 64 SCLKs per
LRCLK, and MCLK runs at 384 the frame rate.
The serial port clock and data timing relationship
for this configuration is indicated Figure 12. The
clock and data signal functions for this configura-
tion are summarized in Table 4.
AC’97 Controller Configuration
In this configuration the CS4610/11 functions as an
AC’97 controller. The CS4610/11 communicates
with an AC’97 Codec, such as the CrystalClear
CS4297, over the AC-link as specified in the Intel
Audio Codec ‘97 Specification version 1.03. A
block diagram for the AC’97 Controller Configura-
tion is given in Figure 7. The signal connections be-
tween the CS4610/11 and the AC’97 Codec are
indicated in Figure 13. In this configuration, the
AC’97 Codec is the timing master for the digital
audio link. The CS4610/11 ASDOUT output sup-
ports data transmission on all 10 possible sample
15 14
15 14 13
ADC 16 Clocks
DAC 16 Clocks
13
...
...
Right Data
0
0
...
15 14 13
DAC 16 Clocks
...
0
15
15
CS4610/11
DS241PP5
®