Artesyn ATCA-7470 Installation and Use (October 2014) - Manual (Page 137)

Functional Description
ATCA-7470 Installation and Use (6806800P15K) 137
Following table shows available variants of the Intel DH8900CC PCH device:
5.21 SMBus
Intel DH8900CC PCH provides four SMBus interface, as described in the following table:
The Master SMBus interface of the Intel DH8900CC PCH is connected to onboard devices like
Clock PLLs, temperature sensors and so on. An I2C Bus Repeater of type PCA9515 is used for
load distribution and buffering.
Additionally both CPUs provide 2x SMBuses to connect to the SPD PROMs of the DDR3 memory
system. Two I2C Bus Level Translators of type PCA9517A are used for voltage level translation
to buffer the SMBus portion going to the SPD PROMs on the DIMM.
Table 5-4 Variants of the Intel DH8900CC PCH Device
Devices
Intel DH8900CC SKU1:
Entry Level Intel DH89xxCC SKU2:
Entry Level Intel DH89xxCC SKU3:
Mid Performance Intel DH8920CC SKU4:
Max performance
Usage on
ATCA-7470 Carrier board:

I/O controller hub
 4xMAC
 Optional QuickAssist
engine with SKU2
Acceleration Module:
Data Processing with
QuickAssist Engines
Table 5-5 SMBus Interface
Device / SMBus Description
Intel DH8900CC
B0:D31:F3 Host SMBus (Master/Slave)
SMLINK1 Connection to external BMC to report thermal information
GbE SMBus Communication between BMC and Ethernet for Passthrough Mode
(SerialOverLan) (Master/Slave)
Endpoint SMBus Allows access to any register in PCI space of Cavecreek as PCI endpoint