Ac'97 Connections; Low Pin Count (Lpc) Interface - Intel VC820 - Desktop Board Motherboard Design Manual

Figure 1-4. (a-d) AC'97 Connections
1.4.7

Low Pin Count (LPC) Interface

In the Intel
(LPC) interface. Migration to the LPC interface allows for lower cost super I/O designs. The LPC
super I/O component requires the same feature set as traditional super I/O components. It should
include a keyboard and mouse controller, floppy disk controller and serial and parallel ports. In
addition to the super I/O features, an integrated game port is recommended because the AC'97
interface does not provide support for a game port. In a system with ISA audio, the game port
typically existed on the audio card. The fifteen pin game port connector provides for two joysticks
and a two-wire MPU-401 MIDI interface. Consult your super I/O vendor for a comprehensive list
of devices offered and features supported.
In addition, depending on system requirements, a device bay controller and USB hub could be
integrated into the LPC super I/O component. For systems requiring ISA support, an ISA-IRQ to
serial-IRQ converter is required. Potentially, this converter could be integrated into the super I/O.
®
Intel 820 Chipset Design Guide
a) AC'97 With Audio Codec
AC'97 Digital
ICH
(241 mBGA)
b) AC'97 With Modem Codec
AC'97 Digital
ICH
(241 mBGA)
c) AC'97 With Audio/Modem Codec
AC'97 Digital
ICH
(241 mBGA)
d) AC'97 With Audio and Modem Codec
Digital Link
ICH
(241 mBGA)
®
820 chipset platform, the super I/O component has migrated to the Low Pin Count
AC'97
Link
Audio
Codec
AC'97
Link
Modem
Codec
AC'97
Audio/
Link
Modem
Codec
AC'97
Modem
Codec
AC'97
AC'97
Audio
Codec
Introduction
Audio Ports
Modem Port
Modem Port
Audio Ports
Modem Port
Audio Ports
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