Revision 1.0
313
CBC Chassis bridge controller. A microcontroller connected to one or more other CBCs.
Together they bridge the IPMB buses of multiple chassis.
CD Compact Disk.
CE Community European or Memory ECC Correctable Error.
CISPR International Special Committee on Radio Interference
CLI command-line interface
CLTT Closed Loop Thermal Throttling for FB-DIMMs
CMOS
Complementary Metal-Oxide Semi-Conductor. In terms of this specification, this
describes the PC-AT compatible region of battery-backed 128 bytes of memory on
the server board.
CMP Core Multi-Processing.
COM Communications
CPD Component Data Sheets
CRTM Core Rott of Trust Measurement
CRU Customer Replaceable Unit
Crystal Beach
A component of Intel
®
I/O Acceleration Technology (Intel
®
I/OAT) which provides
improved Network I/O and RAID performance through a combination of chipset
hardware support as well as BIOS and operating system driver support.
CSA Canadian Standards Organization
CSR control and status register
D2D DC-to-DC converter
DB Data Bus
dBA deciBel Acoustic
DCA
Direct Cache Access. A component of Intel
®
I/O Acceleration Technology (Intel
®
I/OAT) which provides improved I/O network performance.
D-cache Data cache. Processor-local cache dedicated for memory locations explicitly
loaded and stored by running code.
DDR Double Data-Rate memory.
DDR2 Double Data Rate DRAM devices (2
nd
generation)
Deasserted Signals are deasserted when they are not asserted.
DHCP Dynamic Host Configuration Protocol
DIMM Dual In-line Memory Module. A packaging arrangement of memory devices on a
socketable substrate.
DMA Direct Memory Access
DPC Direct Platform Control. Remote server management over the network or serial port
regardless the status of the server’s operating system or power state.
DPS Distributed Power supply
DSDT Differentiated System Description Table. An OEM must supply a DSDT to an ACPI-
compatible operating system. The DSDT contains the Differentiating Definition
Block, which supplies the implementation and configuration information about the
base system.
DSS Decision Support System
DT Double Transition
DVI/DVO Digital Video Input/Ouput.
DWord Double Word, a 32-bit quantity.
DXE
Driver Execution Environment. Component of Intel
®
Platform Innovation
Framework for EFI architecture.