CS4630 View Datasheet(PDF) - Cirrus Logic
Part Name
Description
Manufacturer
CS4630 Datasheet PDF : 38 Pages
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CS4630
depicting the Dual AC ’97 codec configuration as a
docking station is given in Figure 9. In this scenar-
io, the first codec is used in the portable for tradi-
tional functions such as analog support for the
portable’s Line In, Mic In, and Line Out jacks. The
AC Link to the dock is buffered and sent across to
the docking station to support a second
CS4297A/98/99 that supports the dock’s analog
jacks. When the system gets a message that the
docking station is attached, the software can re-
place the portable’s analog jack control for the
docking station’s jacks seemlessly. Using a stan-
dard AC Link for the docking station support main-
tains the highest quality of audio over analog
docking station scenarios. In addition, since the AC
Link is a standard, the docking station can be uti-
lized over a number of portable generations with-
out concern for obsolescence.
The signal connections between the CS4630 and
the dual Codecs are shown in Figure 12. In this
configuration, both AC ‘97 codecs run off the same
ABITCLK with the primary AC ’97 Codec being
the timing master for the first AC Link and for the
CS4630. The secondary CS4297/97A/98/99 and
the CS4630 are slaves to the incoming ABITCLK.
Full FIFO buffers for both codecs are supported.
ABITCLK
ASYNC
ASDOUT
ASDIN
ARST#
12.288 MHz
48 kHz
CS4630
ASDIN2
MIDIIN
MIDIOUT
JACX, JACY, JBCX, JBCY
JAB1, JAB2, JBB1, JBB2
BIT_CLK
SYNC
SDATA_OUT
SDATA_IN
RESET#
CS4297/97A/99
24.576 MHz
BIT_CLK
SYNC
SDATA_OUT
SDATA_IN
RESET#
Secondary
AC’97 2.0 Codec
Joystick/
MIDI Port
Figure 12. Dual AC ‘97 Codec Connection Diagram
DS445PP1
21
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