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SpecificationsCBI/CGI Technical Reference
Chassis Plans 1-9
Specification, the PC Registered DIMM Specification and the PC Serial Presence Detect
Specification.
M
EMORY HOLE The SBC supports a 1MB memory hole option at 512KB-640KB or 15MB-16MB.
E
RROR CHECKING
AND CORRECTION
The memory interface supports ECC modes via BIOS setting for multiple-bit error
detection and correction of all errors confined to a single nibble.
PCI L
OCAL BUS
I
NTERFACE
The SBC is fully compliant with the PCI Local Bus 2.1 Specification. It has optimized
the PCI interface to allow the processor to sustain the highest possible bandwidth
(greater than 100MB/sec sustained) and low latency of the PCI Bus. It supports PCI-to-
PCI bridge technology, a pipelined snoop ahead feature and improved PCI to DRAM
write-back policy. The PCI Local Bus interfaces to standard PCI option cards in the
backplane, and to the on-board PCI Ultra Wide SCSI controller and PCI 10/100Base-T
Ethernet controller. The PCI Local Bus interface to the backplane is compliant with the
PCI Industrial Computer Manufacturers Group (PICMG) 1.0 Specification.
U
NIVERSAL SERIAL
B
US (USB)
The SBC supports two USB 1.0 ports for serial transfers at 12 or 1.5Mbit/sec. The
Universal Serial Bus (USB) is an interface allowing for connectivity to many standard
PC peripherals via an external port.
C
ONCURRENT PCI Concurrent PCI maximizes system performance with simultaneous processor, PCI and
AGP Bus activities. It includes multitransaction timing, enhanced write performance, a
passive release mechanism and support for PCI 2.1 compliant delayed transactions.
AGP VGA
I
NTERFACE (NOT
AVAILABLE ON
BASIC
MODELS)
The 69000 HiQVideo video/graphic accelerator is an Accelerated Graphics Port (AGP)
device. AGP is designed to off-load the PCI Bus by allowing graphics data to move
directly from system memory. The 69000 integrates 2MB of high-speed SDRAM frame
buffer memory into the chip.
By embedding SDRAM and graphics controller logic on the same die, the 69000 delivers
uncompromising performance. The increase in the frame buffer bandwidth enables the
69000 to support high-color, high-resolution graphics modes and real-time video acceler-
ation. The interface supports pixel resolutions up to 1600 x 1200 non-interlaced.
Software drivers for enhanced performance and resolution are available for most popular
operating systems.
S
YSTEM
H
ARDWARE
MONITOR
The system hardware monitoring system monitors system voltages, temperature and fan
speeds.
The circuitry is based on National Semiconductor's LM80. The LM80 monitors seven
system voltages, two fan speeds and the board ambient temperature. All of the voltages,
fan speeds and temperature measurements have associated programmable watchdog
limits. When any of these programmed limits are exceeded, the monitor software can be
used to notify the SBC. In addition, the externally available OS# signal can be used to
notify external hardware of any over-temperature condition.
Fan speed monitoring can be configured to monitor two system fans.