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AT8901
Interconnects to RTM
AMC Bay B1 has eight generic interconnects to the RTM Zone 3 (channels 13 to 20), B2 has
four interconnects (channels 17 to 20). The second SATA/FC port of each AMC Bay (channel
3) is also connected to the RTM.
For further details, please refer to section 3.6., RTM Interface.
AMC GbE Support Channels
The first GbE port of each AMC Bay (channel 0) is connected to the base switch, the second
one (channel 1) of AMC Bay 1 is also connected to the neighbouring Hub Board via Zone 2
Update Channel.
See also section 3.2.
AMC SATA/FC Channels
The first SATA port (channel 2) connects both AMC Bays together. A possible application is a
PrAMC in one Bay and a storage AMC in the other. The second SATA port (channel 3) of each
AMC Bay is connected to the RTM.
3.4
IPMI
The Hub Board supports an intelligent hardware management system, based on the Intelligent
Platform Management Interface (IPMI) Specification 1.5. The hardware management system
provides the ability to manage the power, cooling and interconnect needs of intelligent devices,
to monitor events and to log events to a central repository.
The main building blocks of the IPMI architecture of the AT8901 are:
• IPMC Intelligent Platform Management Controller
• FUM Firmware Update Manager
• CPLD Complex Programmable Logical Device
For further details please refer PICMG 3.0 standard Rev. 2.0.
IPMC
The IPM controller is a 16-bit microcontroller for IPMI applications and it is compliant to IPMI
version 1.5 specification. The microcontroller has large on chip memory of 512 Kbyte Flash and
40 Kbyte SRAM. The microcontroller provides six I2C interfaces to have access to the dedicat-
ed ShMCs, the AMCs, the fabric mezzanine module, the RTM and the on board peripheral de-
vices such as SEEPROM and temperature sensor. The microcontroller also provides three
serial interfaces that are connected to the CPLD.
An LPC interface using the KCS protocol for communication between IPMC and PPC is imple-
mented. IPMC operation is supervised by the FUM.
Hardware Description
Page 3 - 11
AT8901 User Guide
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