2-4 SunNetra CP3000 Advanced Mezzanine Card PCIe Hard Drive and SAS Controller User’s Guide • March 2010
2.2.3 SAS Controller
The AMC.1-HDD SAS disk incorporates a PCIe-to-SAS host controller manufactured
by LSI Corporation, device model LSI-SAS1064E. The controllerprovides host access
to SAS and SATAdisks. The controller features four lanes of PCI Express (2.5
gigabits per second each), and four lanes of SAS (3.0 gigabits per second each).
The SAS firmware for the LSI SAS supports the following:
■3 gigabits per second SAS and SATAtransfers
■Device discovery
■Both 3.0 gigabit and 1.5 gigabit SATAdevices
■x1 or x4 PCI Express bus
■Mixed SAS and SATAdisk operation
■SATAtape drive
■SAS expander compatibility
2.2.4 Flash
A flash device is preloaded with firmwarethat manages the protocols necessary to
communicate with SAS and SATAtarget devices. The flash device contains BIOS and
F-code to support boot from disk operations.
2.2.5 Module Management Controller (MMC)
The IPMI subsystem providesmanagement control for the board, based on an Atmel
microcontroller.The MMC is the first system component to be brought up and must
negotiate with the carrier board over IPMI before the card payload is enabled.
The MMC monitors board voltages and temperature, controls the hot-swap and
failures status LEDs, controls e-Keying, and stores FRU information. For more
information about the MMC and management functions, see Chapter 3.
The MMC provides an Intelligent Platform Management Interface (IPMI) that
communicates with AdvancedTCA shelf managers. This MMC controls and
monitors the following:
■Hot-swap communication with the shelf manager
■Inlet air temperature
■Voltagemonitoring