Manual for P1D series
4 Pin SMBus Connector(SMBUS)
This connector allows you to connect SMBus devices. SMBus devices communicate
through the SMBus with an SMBus host and/or other SMBus devices. The SMBus or
System Management Bus is a specific implementation of I
2
C bus, which is a multi-master
bus, that is, multiple chips can be connected to the same bus and each one can act as a
master by initiating data transfer.
Communication and Networking Riser Interface Connector(CNR)
The mainboard provides this Communication and Networking Riser(CNR) interface which can
support audio and/or modem functions . Furthermore, it provides a LAN interface for network-
ing functions. What its superiority compared with AMR is being able to support plug-and-play
function. Mechanically the CNR shares a PCI slot, thus when you insert the CNR card, the
neighboring PCI slot cannot be used.
By using an audio codec, the AC97 digital link providing by CNR allows for cost-effective,
high-quality, integrated audio on the platform. AC97 digital link also allows several external
codecs to be connected to the ICH2. The digital link is expanded to support twoor three
audio codecs for up to 6 channels of PCM audio output (full AC-3 decode) or a combination
of an audio and modem codec.
Chapter 2
CNR Connector
1
2
3
SMBDATA
SMBCLK
5VSB
GND
4
SMBUS Connector
