Devices on the smbus – HP XU700 User Manual
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47
2 System Board
The Input/Output Controller Hub 2 (82801BA)
•
High quality pseudo differential CD input
•
Mono microphone input
•
An analog line-level stereo inputs for LINE IN
•
Stereo line level output
•
Meets or exceeds Microsoft’s PC’98 and PC’99 audio performance
requirements.
The CS4299 introduces a new architecture that is different from the one
used with the CS4280-CS4297 pair.
Devices on the SMBus
The SMBus is a subset of the I
2
C
bus. It is a two-wired serial bus which runs
at a maximum speed of 100 kHz. It is used to monitor some of the hardware
functions of the system board (such as voltage levels, temperature, fan
speed, memory presence and type), both at system boot and during normal
run-time. It is controlled by the SMBus controller located in the ICH2.
Previous Architecture
New Architecture
North Bridge
South Bridge
CS4297
CS4280 digital
controller
PCI Slots
Audio controller link
PCI Bus
North Bridge
South Bridge
CS4299
Audio controller link