Pin Smbus Connector(Smbus); Communication And Networking Riser Interface Connector(Cnr) - QDI Superb 4L Manual

Chapter 2

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
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 . 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.
Œ
By using an audio codec, the AC'97 digital link providing by CNR allows for cost-effective,
high-quality, integrated audio on the platform. AC'97 digital link also allows several external
codecs to be connected. 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.
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1
2
3
4
ŒSMBUS Connector
Œ
ΠCNR Connector
Manual for S4L series
2
C bus, which is a multi-master
SMBDATA
SMBCLK
GND
5VSB