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Endura EM440 ATX
Rev. B
Embedded Motherboards
QuickStart Guide
The following information is provided to help you begin using your RadiSys EM440 ATX
motherboard as quickly as possible.
The RadiSys EM440 is an ATX-family motherboard that meets the ATX form factor specification. It is based
around an Intel Celeron or Pentium III socket 370 processor and an Intel 440BX chipset.
PSU
It is recommended that an ATX style ‘soft-switched’ power supply be use d to power the board. A ‘hardswitched’ power suppl y will also work as long as it has the facilit y of pr ov iding 3.3V. Beware that some power
management features will not be supported using ‘hard-switched’ PSU’s as they do not have a 5V
SBY
output.
CPU
The motherboard supports Socket 370 PGA Celeron and FC-PGA Pentium III processors operating at
66MHz and 100MHz FSB (Front Side Bus) . Processor s from 300MH z upto 850MHz are curr ently supp orted.
Processor core multipl iers and vo ltag es are set aut omatically by the proc es sor , wh ich eliminates the need for
any CPU speed jum pers . For proper cooli ng of the proces sor a n acti ve (f an) heat sink is recom m ended and
a connector (J13) is provided for this.
RAM
Two 168-pin DIMM sockets are fitted to the motherboard which accept 64-bit wide unbuffered PC-100
SDRAM modules with Serial Presence Detect (SPD), providing a maximum capacity of 512MB.
The EM440 motherboar d does support 72-bit wide ECC m emory. When using ECC modules enab le ECC
mode using the BIOS setup facility during startup.
Hardware
The current hardware revisio n 01(Rev B) does not have an o peratio nal USB interf ace, this has been fix ed in
revision 02(Rev C) and later.
BIOS
Configuration of the motherboar d, in the majority of cases, is achieved thr ough BIOS settings. Ple ase note
that the BIOS is currentl y in its ear ly stages of devel opment an d sam ple boards m ay be sup plied with a prerelease BIOS in which not all options/settings are available. BIOS updates will be made available for
download during the course of th e BIO S devel opm ent and will be in the do wnoa d library on the Radisys web
www.radisys.com
site
. See the Motherboard section under Intel CPU P latfor m s .
Drivers
The currently validated software drivers for the Video device on the motherboard, for Windows9x,
WindowsNT and W indows2000 operating systems , are posted in the downoad librar y on the Radisys web
www.radisys.com
site
. See the Motherboard section under Intel CPU P latf orm s .
RadiSys Corporation 25/09/00 (Rev 1.0a) Endura EM440 ATX
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Motherboard Connectors
J
J4J3J
The following diagram shows the location of the motherboard connectors.
PCI SLOTSISA SLOTS AGP SLOT
ATX Rise r
Printer, COM 1, (Video)
1
2J8J5
2xUSB
Keyboa rd Lowe r
Mouse Upper
J13
DIMM1
DIMM0
J7
J6
S1
J1 Floppy Diskette Connector
J2 Front Panel Header
J3 Primary IDE Connector
J4 Secondary IDE Connector
J5 BIOS Recovery Jumper
J6 Hard/Soft Switch PSU selection
J7 ATX Power Connector
J8 Serial Port COM2 Header
J13 Processor Fan (+12V)
S1 CR2032 Battery
RadiSys Corporation 25/09/00 (Rev 1.0a) Endura EM440 ATX
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Connector Pin Outs
BIOS Recovery Jumper (J5)
The BIOS recovery jumper block allows the EM440 BIOS flash device to be unprotected so that new BIOS
code can be written during re-flash updates.
2 4 6 8 10
1 3 5 7 9
Description Pins to Link
Normal None
BIOS Recovery 3-8 & 5-6
Post Loop 9-10
Hard/Soft Switch PSU jumper (J6)
The EM440 can be configured for hard or soft switch power supplies.
1 2
3 4
5 6
PSU Mode Pins to Link
Hard Switch 1-3 & 5-6
Soft Switch 1-2 & 4-6 (Default)
Front Panel Connector (J2)
The front panel connector has positions for LEDs, switches, speaker and chassis fan
29 1
Pin No. Description Pin No. Description Pin No. Description
1 GND (0V) 11 HD LED PWR 21 NC
2 Chassis FAN +12V 12 ~HD ACTIVITY LED 22 Key
3 GND (0V) 13 GND (0V) 23 NC
4 GND (0V) 14 HD LED PWR 24 NC
5 ~RESET SWITCH 15 POWER SWITCH 25 Key
6 NC 16 GND (0V) 26 Speaker O/P
7 POWER LED(+5V) 17 NC 27 Speaker O/P
8 POWER LED(+5V) 18 NC 28 Key
9 GND (0V) 19 NC 29 GND (0V)
10 GND (0V) 20 Key
RadiSys Corporation 25/09/00 (Rev 1.0a) Endura EM440 ATX
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