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14 AC ’97 Programmer’s Reference Manual
Figure 2. Intel
®
ICH5 AC ’97 Controller Connection to Its Companion Codecs
Intel
®
ICH
Digital Controller
Primary Codec
AC '97/AC '97 2.x/AMC '97
RESET#
SDATA_OUT
SYNC
BIT_CLK
SDATA_IN_2
SDATA_IN_1
SDATA_IN_0
AC '97/MC '97 2.x/AMC '97
AC '97/AC '97 2.x/AMC '97
Secondary
Codec
Tertiary Codec
2751_2
2.1.1 Third AC ’97 Component Specification Revision 2.1,
Revision 2.2 and Revision 2.3 Compliant Codecs
The AC ’97 Component Specification provides capability for up to four, SDATA_IN signals in
support of up to four codecs. The ICH5 AC ’97 controller provides support for up to three codecs
to allow for Audio channel expansion without sacrificing the Modem Codec (MC) support. Also,
the third codec capability enables a better mobile docking infrastructure.