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Chapter 2
4-40 screws (4)
0.6 inch spacers (4)
PCI Stack
through
Headers
0.6 inch spacers (4)
4-40 nuts (4)
Product Description
The LittleBoard 800 is an exceptionally high integration, high performance, rugged, and high quality
single-board system, which contains all the component subsystems of a PC motherboard plus the
equivalent of up to 3 expansion boards. Based on the Intel Pentium® M and Celeron® M ultra high
performance, high-integration processor, the LittleBoard 800 gives designers a complete, high
performance embedded processor based on the EBX form factor and conforms to the EBX V1.1
specifications.
Each LittleBoard 800 incorporates a Intel 855GME chipset for the Graphics and Memory Hub
(Northbridge) and the I/O Hub (Southbridge) controllers. This set includes the 82855GME, Graphics
and Memory Controller Hub, (also GMCH), which controls the graphics and memory interface. The
other chip in this set is the 82801DBM, I/O Controller Hub 4 Mobile (also ICH4-M), which controls
some of the I/O functions on the board. There are two additional chips that provide the reminder of the
I/O functions, specifically, the Standard Microsystems, LPC47B272, Super I/O controllers. Together the
Intel and SMSC chips provides four serial ports, a EPP/ECP parallel port, four USB 2.0 ports, PS/2
keyboard and mouse interfaces, floppy and two Ultra/DMA 33/66/100 IDE controllers supporting two
IDE drives each, independent 10/100BaseT and 10/100/1000BaseT Ethernet interfaces, and an audio
AC'97 CODEC on the board. To provide the ISA bus on the board through the PC/104 connector, an
ITE, IT8888F, PCI-to-ISA Bridge is included. The LittleBoard 800 also supports up to 1GB of DDR
RAM in a single 184-pin DDR DIMM slot, and an AGP4x equivalent graphics controller, which
provides CRT and LVDS flat panel video interfaces for most popular LCD panels.
The LittleBoard 800 can be expanded through the PC/104 and PC/104-Plus expansion for additional
system functions, as these buses offer compact, self-stacking, modular expandability. The PC/104 and
PC/104-Plus buses are the embedded system version of the signal set provided on a desktop PC's ISA
and PCI buses at 8MHz and 33MHz clock speeds respectively.
Among the many embedded-PC enhancements on the LittleBoard 800 that ensure embedded system
operation and application versatility are a watchdog timer, serial console support, battery-free boot, on-
board high-density CompactFlash disk, and BIOS extensions for OEM boot customization.
The LittleBoard 800 is particularly well suited to either embedded or portable applications and meets the
size, power consumption, temperature range, quality, and reliability demands of embedded system
applications. It can be stacked with Ampro MiniModules™ or other PC/104-compliant expansion
boards, or it can be used as powerful computing engine. The LittleBoard 800 requires a single +5V
power supply.
6
PC/104 Module
PC/104 Plus Module
Little Board 800
Figure 2-1. Stacking PC/104 Modules with the LittleBoard 800
Reference Manual
Product Overview
ISA Bus
Stackthrough
Expansion
Headers
LittleBoard 800
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