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Chapter 2 Product Overview
6 Reference Manual XTX 820
The XTX flexibility enables designers to take an accelerated, low risk path with proven XTX module
designs. Your design flow might look similar to the one shown in Figure 2-2. This diagram gives a
Typical Design Flow of hardware and software functions.
CPU and Software
Design Path
Design application-
specific baseboard
Fabricate baseboard
Debug baseboard
Revise baseboard
if necessary
Integrate application code
Hardware
Design Path
Select CPU
Select OS & Tools
Write and Test
A
pplication Code
Write drivers for
custom Logic
XTX820designflw
Figure 2-2. Typical Design Flow
Product Description
The XTX 820 is an exceptionally high integration, high performance, rugged, and high quality
Computer-On-Module (COM), which contains all the component subsystems of a PC/AT motherboard
plus the equivalent of up to 5 expansion boards. The XTX 820 is based on the ultra high performance,
high-integration Intel Pentium M and Celeron M processors giving designers the choice of a complete,
high performance, rugged, embedded processor based on the XTX form factor that conforms to the ETX
V2.7 specification. The module plugs into a custom baseboard which has connectors and additional
circuitry to meet your application requirements.
Each XTX 820 incorporates an Intel® 915GM chipset (82915GM + 82801FBM). This includes the
Intel 82915GM Memory & Graphics Hub (Northbridge), which controls the memory and graphics
interface and the Intel 82801FBM I/O Hub (Southbridge) controller for some of the important I/O
functions. A Super I/O chip (83627HG) by Winbond Electronics, Corp controls most of I/O
functions. Together these three chips provide four x1 PCI Express Lanes, PCI bus, two Serial ATA
portsand one Ultra/DMA 33/66/100 EIDE controller for two EIDE drives, six USB 2.0 ports, one
shared EPP/ECP parallel/ floppy port, two serial ports with TTL levels, one Infrared (IrDA) port,
PS/2 keyboard and mouse interfaces, and an AC’97/HDA (High Definition Audio) CODEC on the
module. The XTX 820 also supports ACPI 2.0 Power Management, 10/100BaseT Ethernet interface,
up to 1 GB of DDR2 RAM in a single 200-pin SODIMM socket, and a 128-bit graphics controller,
which provides CRT (VGA), a dedicated LVDS port, TV Out, and two SDVO port interfaces.
The XTX 820 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. The XTX 820 requires only a single +5V power supply.