BCM MX255D User Manual

User’s Manual

MX255D

3rd Generation Intel® Atom™ D2550 Fanless Mini
ITX Motherboard (Cedar Trail Platform) supports 12V
DC Power

ii

▍ Preface

Copyright NoticeCopyright Notice

The material in this document is our intellectual property. We take every
care in the preparation of this document, but no guarantee is given as to the
correctness of its contents. Our products are under continual improvement
and we reserve the right to make changes without notice.

TrademarksTrademarks

All trademarks are the properties of their respective owners.

￭ NVIDIA

®

is registered trademark of NVIDIA Corporation.

￭

ATI® is registered trademark of ATI Technologies, Inc.

￭

AMD® is registered trademarks of AMD Corporation.

￭

Intel® is registered trademarks of Intel Corporation.

￭

Windows® is registered trademarks of Microsoft Corporation.

￭

AMI® is registered trademark of Advanced Micro Devices, Inc.

￭

Award® is a registered trademark of Phoenix Technologies Ltd.

￭

Realtek® is registered trademark of Realtek Semiconductor Corpora­tion.

Revision HistoryRevision History

Revision Revision Revision HistoryRevision History DateDate

1.1 Production release 08/31/2012

1.2 Update operating temperature 10/16/2012

iii

MX255D

Safety Instructions

Safety Instructions

￭ Always read the safety instructions carefully.
￭ Keep this User’s Manual for future reference.
￭ Keep this equipment away from humidity.
￭ Lay this equipment on a reliable fl at surface before setting it up.
￭ The openings on the enclosure are for air convection hence protects the

equipment from overheating. DO NOT COVER THE OPENINGS.

￭ Make sure the voltage of the power source and adjust properly 110/220V

before connecting the equipment to the power inlet.

￭ Place the power cord such a way that people can not step on it. Do not

place anything over the power cord.

￭ Always Unplug the Power Cord before inserting any add-on card or mod-

ule.

￭ All cautions and warnings on the equipment should be noted.
￭ Never pour any liquid into the opening that could damage or cause electri-

cal shock.

￭ If any of the following situations arises, get the equipment checked by ser-

vice personnel:

◯ The power cord or plug is damaged.
◯ Liquid has penetrated into the equipment.
◯ The equipment has been exposed to moisture.
◯ The equipment does not work well or you can not get it work according

to User’s Manual.

◯ The equipment has dropped and damaged.
◯ The equipment has obvious sign of breakage.

￭ DO NOT LEAVE THIS EQUIPMENT IN AN ENVIRONMENT UNCONDI-

TIONED, STORAGE TEMPERATURE ABOVE 60oC (140oF), IT MAY DAM­AGE THE EQUIPMENT.

CAUTION

CAUTION: Danger of explosion if battery is incorrectly replaced. Replace only with

the same or equivalent type recommended by the manufacturer.

警告使用者:
這是甲類資訊產品，在居住的環境中使用時，可能會造成無線電干擾，在這種情

況下，使用者會被要求採取某些適當的對策。

廢電池請回收
For better environmental protection, waste batteries should be
collected separately for recycling or special disposal.

iv

▍ Preface

CE Conformity

CE Conformity

Hereby, we declare that this device is in compliance with the
essential safety requirements and other relevant provisions set
out in the European Directive.

FCC-B Radio Frequency Interference

FCC-B Radio Frequency Interference

Statement

Statement

This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equip­ment generates, uses and can radiate radio frequency energy and, if not in­stalled and used in accordance with the instruction manual, may cause harmful
interference to radio communications. However, there is no guarantee that in­terference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the measures listed below:

￭ Reorient or relocate the receiving antenna.
￭ Increase the separation between the equipment and receiver.
￭ Connect the equipment into an outlet on a circuit diff erent from that to

which the receiver is connected.

￭ Consult the dealer or an experienced radio/television technician for help.

NOTICE 1

NOTICE 1

The changes or modifi cations not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.

NOTICE 2

NOTICE 2

Shielded interface cables and AC power cord, if any, must be used in order to
comply with the emission limits.

VOIR LA NOTICE D’INSTALLATION AVANT DE RACCORDER AU RESEAU.

This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:

1. this device may not cause harmful interference, and

2. this device must accept any interference received, including interference
that may cause undesired operation.

v

MX255D

WEEE Statement

WEEE Statement

ENGLISH

Under the European Union (“EU”) Directive on Waste Electrical and Electronic Equipment,
Directive 2002/96/EC, which takes effect on August 13, 2005, products of “electrical and
electronic equipment” cannot be discarded as municipal waste anymore and manufactur­ers of covered electronic equipment will be obligated to take back such products at the
end of their useful life.

DEUTSCH

Gemäß der Richtlinie 2002/96/EG über Elektro- und Elektronik-Altgeräte dürfen Elektro­und Elektronik-Altgeräte nicht mehr als kommunale Abfälle entsorgt werden. Wir haben
europaweit verschiedene Sammel- und Recyclingunternehmen beauftragt, die in die Eu­ropäische Union in Verkehr gebrachten Produkte, am Ende seines Lebenszyklus zurück­zunehmen. Bitte entsorgen Sie dieses Produkt zum gegebenen Zeitpunkt ausschliesslich
an einer lokalen Altgerätesammelstelle in Ihrer Nähe.

FRANÇAIS

Au sujet de la directive européenne (EU) relative aux déchets des équipement électriques
et électroniques, directive 2002/96/EC, prenant effet le 13 août 2005, que les produits élec­triques et électroniques ne peuvent être déposés dans les décharges ou tout simplement
mis à la poubelle. Les fabricants de ces équipements seront obligés de récupérer certains
produits en fi n de vie. Par conséquent vous pouvez retourner localement ces matériels
dans les points de collecte.

РУССКИЙ

В соответствии с директивой Европейского Союза (ЕС) по предотвращению
загрязнения окружающей среды использованным электрическим и электронным
оборудованием (директива WEEE 2002/96/EC), вступающей в силу 13 августа 2005
года, изделия, относящиеся к электрическому и электронному оборудованию, не могут
рассматриваться как бытовой мусор, поэтому производители вышеперечисленного
электронного оборудования обязаны принимать его для переработки по окончании
срока службы.

ESPAÑOL

Bajo la directiva 2002/96/EC de la Unión Europea en materia de desechos y/o equipos
electrónicos, con fecha de rigor desde el 13 de agosto de 2005, los productos clasifi cados
como “eléctricos y equipos electrónicos” no pueden ser depositados en los contenedores
habituales de su municipio, los fabricantes de equipos electrónicos, están obligados a
hacerse cargo de dichos productos al termino de su período de vida.

NEDERLANDS

De richtlijn van de Europese Unie (EU) met betrekking tot Vervuiling van Electrische en
Electronische producten (2002/96/EC), die op 13 Augustus 2005 in zal gaan kunnen niet

vi

▍ Preface

meer beschouwd worden als vervuiling. Fabrikanten van dit soort producten worden
verplicht om producten retour te nemen aan het eind van hun levenscyclus.

SRPSKI

Po Direktivi Evropske unije (“EU”) o odbačenoj ekektronskoj i električnoj opremi, Di­rektiva 2002/96/EC, koja stupa na snagu od 13. Avgusta 2005, proizvodi koji spadaju
pod “elektronsku i električnu opremu” ne mogu više biti odbačeni kao običan otpad i
proizvođači ove opreme biće prinuđeni da uzmu natrag ove proizvode na kraju njihovog
uobičajenog veka trajanja.

POLSKI

Zgodnie z Dyrektywą Unii Europejskiej (“UE”) dotyczącą odpadów produktów elektry­cznych i elektronicznych (Dyrektywa 2002/96/EC), która wchodzi w życie 13 sierpnia
2005, tzw. “produkty oraz wyposażenie elektryczne i elektroniczne “ nie mogą być trak­towane jako śmieci komunalne, tak więc producenci tych produktów będą zobowiązani
do odbierania ich w momencie gdy produkt jest wycofywany z użycia.

TÜRKÇE

Avrupa Birliği (AB) Kararnamesi Elektrik ve Elektronik Malzeme Atığı, 2002/96/EC Kara­rnamesi altında 13 Ağustos 2005 tarihinden itibaren geçerli olmak üzere, elektrikli ve
elektronik malzemeler diğer atıklar gibi çöpe atılamayacak ve bu elektonik cihazların
üreticileri, cihazların kullanım süreleri bittikten sonra ürünleri geri toplamakla yükümlü
olacaktır.

ČESKY

Podle směrnice Evropské unie (“EU”) o likvidaci elektrických a elektronických výrobků
2002/96/EC platné od 13. srpna 2005 je zakázáno likvidovat “elektrické a elektronické
výrobky” v běžném komunálním odpadu a výrobci elektronických výrobků, na které se
tato směrnice vztahuje, budou povinni odebírat takové výrobky zpět po skončení jejich
životnosti.

MAGYAR

Az Európai Unió („EU”) 2005. augusztus 13-án hatályba lépő, az elektromos és elektron­ikus berendezések hulladékairól szóló 2002/96/EK irányelve szerint az elektromos és
elektronikus berendezések többé nem kezelhetőek lakossági hulladékként, és az ilyen
elektronikus berendezések gyártói kötelessé válnak az ilyen termékek visszavételére
azok hasznos élettartama végén.

ITALIANO

In base alla Direttiva dell’Unione Europea (EU) sullo Smaltimento dei Materiali Elettrici
ed Elettronici, Direttiva 2002/96/EC in vigore dal 13 Agosto 2005, prodotti appartenenti
alla categoria dei Materiali Elettrici ed Elettronici non possono più essere eliminati come
rifi uti municipali: i produttori di detti materiali saranno obbligati a ritirare ogni prodotto alla
fi ne del suo ciclo di vita.

vii

MX255D

CONTENTS

Copyright Notice .................................................................................ii

Trademarks .........................................................................................ii

Revision History ..................................................................................ii

Safety Instructions .............................................................................iii

CE Conformity ....................................................................................iv

FCC-B Radio Frequency Interference Statement ..............................iv

WEEE Statement ............................................................................... v

1. Overview.............................................................................................1-1

Mainboard Specifi cations ................................................................1-2

Mainboard Layout ........................................................................... 1-4

2. Hardware Setup ................................................................................. 2-1

Quick Components Guide ............................................................... 2-2

Memory ........................................................................................... 2-3

Power Supply .................................................................................. 2-4

Back Panel I/O ................................................................................ 2-5

Connector ....................................................................................... 2-8

Jumper .......................................................................................... 2-16

Slot ................................................................................................ 2-18

3. BIOS Setup ......................................................................................... 3-1

Entering Setup ................................................................................ 3-2

The Menu Bar ................................................................................. 3-4

Main ................................................................................................ 3-5

Advanced ........................................................................................ 3-7

Boot ............................................................................................... 3-13

Security ......................................................................................... 3-14

Chipset .......................................................................................... 3-16

Power ............................................................................................ 3-17

Exit ................................................................................................ 3-19

4. System Resources ............................................................................4-1

AMI POST Code ............................................................................. 4-2

Resource List .................................................................................. 4-6

GPIO Programming ........................................................................4-8

Thank you for choosing the MX255D, an excellent in­dustrial computer board from BCM.

Based on the innovative Intel® NM10 chipset for op­timal system effi ciency, the MX255D accommodates
the Intel® Cedarview-D processor and supports up to
2 DDR3 1066MHz Unbuffered, Non-ECC SO-DIMM
slots to provide the maximum of 4GB memory capac­ity.

In the advanced-level and mid-range market segment,
the MX255D provides a high-performance solution for
today’s front-end and general purpose workstation, as
well as in the future.

Chapter 1

Overview

1-2

▍ Overview

Mainboard Specifi cations

Mainboard Specifi cations

CPU

■ Intel Cedarview-D D2550 processor

Chipset

■ North Bridge: integrated with CPU

■ South Bridge: Intel NM10 chipset

Memory

■ 2 DDR3 1066MHz Unbuffered, non-ECC SO-DIMM

slots, supporting the maximum of 4GB

LAN

■ 2 Intel 82574L GbE controllers

SATA

■ 2 SATA 3Gb/s ports by Intel NM10

Audio

■ HDA Codec by Realtek® ALC887 or ALC886

■ Compliant with Azalia 1.0 specs

■ With amplifi er

Graphics

■ Intel 3650 series / 3600 series integrated Graphics

Engine

■ Resolution up to 1920 x 1200 pixels

CF

■ 1 CompactFlash socket by JMicron JMB368

Back
Panel I/O

■ 1 DC power jack

■ 1 RS-232/422/485 serial port (COM1)

■ 1 RS-232 serial port (COM2)

■ 1 VGA port

■ 1 DVI-D port

■ 2 Gigabit LAN jacks

■ 4 USB 2.0 ports

■ 1 Line-In audio jack

■ 1 Line-Out audio jack

■ 1 Mic-In audio jack

1-3

MX255D

Onboard
Connec­tors/ Pin­headers

■ 2 SATA 3Gb/s ports

■ 2 USB 2.0 pinheaders (3 ports)

■ 1 LVDS connector

■ 1 LVDS inverter connector

■ 4 serial port connectors

■ 6 serial port power select jumpers

■ 1 parallel port connector

■ 1 keyboard/mouse connector

■ 1 GPIO connector

■ 1 amplifi er pinheader

■ 1 chassis intrusion pinheader

■ 1 front audio connector

■ 1 SPDIF out connector

Slot

■ 1 32-bit/33MHz PCI slot

■ 1 mini PCI-E slot

■ 1 CompactFlash socket

Form Fac­tor

■ Mini-ITX: 170mm x 170mm

Environ­mental

■ Operating Temperature:

• A system fan is required for 45C to 60C

■ Storage Temperature: -20oC to 80oC

■ Humidity: 5% ~ 90% RH, Non-Condensing

• For fanless solution: 0C to 45C

1-4

▍ Overview

Mainboard Layout

Mainboard Layout

Top: LAN Jack
Bottom: USB Ports

Top: LAN Jack
Bottom: USB Ports

Top: VGA Port
Bottom: DVI-D Port

Top:
COM1
Bottom:
COM2

T: Line-In
M: Line-Out
B: Mic-In

JAUD1 SYSFAN1

CPUFAN1

JSEL1

JVDD1

PCI1

DIMM1

DIMM2

JGPIO1

JUSB1

JPWR1

JSPI1

JBAT1

SATA1

SATA2

JCOMP1
JCOMP2
JCOMP3

JCOMP4
JCOMP5
JCOMP6

JLPT1

CON1

JAMP1

JINV1

JKB_MS1

JLVDS1

JPWR2

JCI1

JFP1

JUSB2

COM4

COM3

COM6

COM5

This chapter provides you with the information on
mainboard hardware confi gurations. Incorrect setting
of jumpers and connectors may damage your main­board. Please pay special attention not to connect
these headers in wrong direction. DO NOT adjust any
jumper while the mainboard is powered on.

Chapter 2

Hardware Setup

2-2

▍ Hardware Setup

Quick Components Guide

Quick Components Guide

SATA Connector, p.2-8

Back Panel I/O,
p.2-5

Chassis Intrusion
Connector, p.2-8

LVDS Connector, p.2-14

PCI Slot, p.2-18

Serial Port

Connector,

p.2-13

Keyboard/Mouse
Connector, p.2-10

Parallel Port

Connector,

p.2-12

Amplifi er

Connector,

p.2-9

DIMM Slot,
p.2-3

Front Panel Con­nector, p.2-10

Front USB Connector,
p.2-11

Fan Power
Connector,
p.2-9

LVDS Inverter
Connector, p.2-14

Mini PCI-E

Slot, p.2-18

GPIO
Connector,
p.2-12

DC Power
Connector,
p.2-4

SATA Power
Connector, p.2-4

Clear CMOS
Jumper, p.2-16

COM Power Select
Jumper, p.2-17

AT/ATX Power Select
Jumper, p.2-17

Front Audio
Connectort,
p.2-15

LVDS Power
Jumper, p.2-17

Fan Power
Connector,
p.2-9

Front USB
Connector,
p.2-11

2-3

MX255D

Memory

Memory

INSTALLING MEMORY MODULES

1. Locate the SO-DIMM slot. Align the notch on the DIMM with the key on
the slot and insert the DIMM into the slot.

2. Push the DIMM gently downwards until the slot levers click and lock
the DIMM in place.

3. To uninstall the DIMM, fl ip the slot levers outwards and the DIMM will
be released instantly.

Important

Important

You can barely see the golden fi nger if the memory module is properly in-
serted in the DIMM slot.

2-4

▍ Hardware Setup

DC POWER CONNECTOR: JPWR1

This DC-In connector provides 12V power input.

4.DC
P

owe

r

2.Ground

3.DC
P

owe

r

1

.Ground

SATA Power Connector: JPWR2

This DC-In connector provides DC power output for SATA devices.

4+12V

3.GND

2.GND

1.VCC

5

Power Supply

Power Supply

2-5

MX255D

Back Panel I/OBack Panel I/O

▶ DC Power Jack

▶ COM1: RS-232/422/485 Serial Port

The serial port is a 16550A high speed communications port that sends/
receives 16 bytes FIFOs. You can attach a serial mouse or other serial de­vices directly to the connector.

PIN SIGNAL DESCRIPTION

1
2
3
4
5
6
7
8
9

DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
VCC_COM1

Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request To Send
Clear To Send
Voltage select setting by jumper

RS-232

RS-232/422/485

Serial Port

DVI-D Port

VGA Port

LAN Jack

USB 2.0 Ports

Line-In Jack

Line-Out Jack
Mic Jack

LAN Jack

USB 2.0 PortsRS-232

Serial Port

DC Powr Jack

2-6

▍ Hardware Setup

PIN SIGNAL DESCRIPTION

1
2
3
4
5
6
7
8
9

422 TXD­422 RXD+
422 TXD+
422 RXD­GND
NC
NC
NC
NC

Transmit Data, Negative
Receive Data, Positive
Transmit Data, Positive
Receive Data, Negative
Signal Ground
No Connection
No Connection
No Connection
No Connection

RS-422

PIN SIGNAL DESCRIPTION

1
2
3
4
5
6
7
8
9

485 TXD­NC
485 TXD+
NC
GND
NC
NC
NC
NC

Transmit Data, Negative
No Connection
Transmit Data, Positive
No Connection
Signal Ground
No Connection
No Connection
No Connection
No Connection

RS-485

▶ COM2: RS-232 Serial Port

The serial port is a 16550A high speed communications port that sends/ re­ceives 16 bytes FIFOs. You can attach a serial mouse or other serial devices
directly to the connector.

▶ VGA Port

The DB15-pin female connector is provided for monitor.

▶ DVI-D Port

The DVI-D (Digital Visual Interface-Digital) connector allows you to connect
an LCD monitor. It provides a high-speed digital interconnection between the
computer and its display device. To connect an LCD monitor, simply plug
your monitor cable into the DVI connector, and make sure that the other end

2-7

MX255D

of the cable is properly connected to your monitor (refer to your monitor
manual for more information.)

▶ USB 2.0 Port

The USB (Universal Serial Bus) port is for attaching USB devices such as
keyboard, mouse, or other USB-compatible devices.

▶ LAN Jack

The standard RJ-45 LAN jack is for connection to the Local Area Network
(LAN). You can connect a network cable to it.

Speed IndicatorActivity Indicator

Left LED Right LED

Active LED 100M/1000M Speed LED

LED Color

Yellow

Yellow

Green

Green/

Orange

Orange

10M Cable
Plug-in

No Transmission

Yellow

Yellow (Lighting) OFF

Transmission

Yellow

Yellow (Blinking) OFF

100M Cable
Plug-in

No Transmission

Yellow

Yellow (Lighting)

Green

Green (Lighting)

Transmission

Yellow

Yellow (Blinking)

Green

Green (Lighting)

1000M Cable
Plug-in

No Transmission

Yellow

Yellow (Lighting)

Orange

Orange (Lighting)

Transmission

Yellow

Yellow (Blinking)

Orange

Orange (Lighting)

In S3/S4/S5 Standby State

Yellow

Yellow (Lighting) OFF

▶ Audio Jack

■ Line-In (Blue) - for external CD player or other audio devices

■ Line-Out (Green) - for speakers or headphones

■ Mic-In (Pink) - for microphones

2-8

▍ Hardware Setup

Connector

Connector

CHASSIS INTRUSION CONNECTOR: JCI1

This connector is provided to connect the chassis intrusion switch cable. If
the chassis is opened, the chassis intrusion mechanism will be activated.
The system will record this status and show a warning message on the
screen. To clear the warning, you must enter the BIOS utility and clear the
record.

1

.

C

I

N

T

R

U

2

.

G

r

o

u

n

d

Serial ATA Connector: SATA1 ~ SATA2

This connector is a high-speed Serial ATA interface port. Each connector
can connect one Serial ATA device.

Important

Important

Please do not fold the Serial ATA cable into 90-degree angle. Otherwise,

2-9

MX255D

AUDIO AMPLIFIER CONNECTOR: JAMP1

The JAMP1 is used to connect audio amplifi ers to enhance audio perfor-
mance.

2.AMP_L+

1.AMP_

L

-

4.AMP_R

+

3.AMP_R-

Fan Power Connector: CPUFAN1, SYSFAN1

The fan power connector supports system cooling fan with +12V. When
connecting the wire to the connectors, always note that the red wire is the
positive and should be connected to the +12V; the black wire is Ground and
should be connected to GND. If the mainboard has a System Hardware
Monitor chipset onboard, you must use a specially designed fan with speed
sensor to take advantage of the CPU fan control.

1

.

G

r

o

u

n

d

2

.

+

1

2

V

3

.

S

e

n

s

o

r

4

.

C

o

n

t

r

o

l

Important

Important

• Please refer to the recommended CPU fans at processor’s offi cial web-
site or consult the vendors for proper CPU cooling fan.

• Fan cooler set with 3- or 4-pin power connector are both available for
CPUFAN1.

2-10

▍ Hardware Setup

KEYBOARD/MOUSE CONNECTOR: JKB_MS1

This connector is used to connect PS/2 keyboard & mouse.

10.NC

8.GND

6

.KBCLK_PH#

4.KBDAT_PH#

2.KBMS_Power

1.KBMS_Powe

r

3.MSDAT_PH#

5.MSCLK_PH#

7.GND

9.NC

Front Panel Connector: JFP1

This front panel connector is provided for electrical connection to the front
panel switches & LEDs and is compliant with Intel Front Panel I/O Con­nectivity Design Guide.

1.HDD_LED

+

3.HDD_LED-

10.No

P

in

5.Reset_SW-

7.Reset_SW+

9.Reserved

8.Power_SW-

6.Power_SW+

4.Power_LED-

2.Power_LED+

2-11

MX255D

Important

FRONT USB CONNECTOR: JUSB1, JUSB2

This connector, compliant with Intel I/O Connectivity Design Guide, is ideal
for connecting high-speed USB interface peripherals such as USB HDD,
digital cameras, MP3 players, printers, modems and the like.

1.VC

C

3.USB0-

10.NC

5.USB0+

7.Ground

9.No
P

i

n

8.Ground

6.USB1+

4.USB1-

2.VCC

2.Data-

1.Power

4.Ground

3.Data+

Important

Important

Note that the pins of VCC and GND must be connected correctly to avoid
possible damage.

2-12

▍ Hardware Setup

GPIO CONNECTOR: JGPIO1

This connector is provided for the General-Purpose Input/Output (GPIO)
peripheral module.

8.GPIO

O

utput 2

6.GPIO

O

utput 1

4.GPIO

O

utput 0

1.+12V

3.GPIO

I

nput

0

1

0.GPIO

O

utput 3

5.GPIO

I

nput 1

7.GPIO

I

nput 2

9.GPIO

I

nput

3

2.VCC5

12.KEY

11.GND

Parallel Port Connector: JLPT1

The mainboard provides a 26-pin header for connection to an optional
parallel port bracket. The parallel port is a standard printer port that sup­ports Enhanced Parallel Port (EPP) and Extended Capabilities Parallel Port
(ECP) mode.

1.RSTB

#

3.PRND0

5.PRND1

7.PRND2

9.PRND3

11.PRND4

13.PRND5

15.PRND6

17.PRND7

19.ACK#

21.BUSY

23.PE

25.SLCT

10.Ground

14.Ground

8.LPT_SLIN#

12.Ground

6.PINIT#

4.ERR#

2.AFD#

24.Ground

22.Ground

2

6.No Pin

20.Ground

18.Ground

16.Ground

2-13

MX255D

RS-232 SERIAL PORT CONNECTOR: COM3, COM4,
COM5, COM6

This connector is a 16550A high speed communications port that sends/
receives 16 bytes FIFOs. You can attach a serial device to it through an
optional serial port bracket.

8.CTS

3.TXD

1.DC

D

6.DSR

5.GND

4.DTR

7.RTS

2.RX

D

9.VCC_COM

PIN SIGNAL DESCRIPTION

1
2
3
4
5
6
7
8
9

DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
VCC_COM

Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request To Send
Clear To Send
12V or 5V power output,

selected by JCOMP

2-14

Hardware Setup

▍

LVDS Connector: JLVDS1

The LVDS (Low Voltage Differential Signal) connector provides a digital in-

terface typically used with at panels. After connecting an LVDS interface
at panel to the JLVDS1, be sure to check the panel datasheet and set the

JVDD1 jumper to proper power voltage.

39.G ND

27.G ND

25.

LVDS1_D ATA 3 N

23.LVDS 1_ CKN

21.LVDS 1_ DATA 2 N

19.LVDS 1_ DATA1 N

17.LVDS 1_ DATA0 N

15.B ackligh t Ena ble

13.B ackligh t Con trol

11.LDDC _C LK

9.LC D_VDD

7.+3 .3V

5.+1 2V

3.+1 2V

1.+1 2V

40.G ND

28.G ND

26.

LVDS1_D ATA 3 P

24.LVDS 1_ CKP

22.LVDS 1_ DATA 2 P

20.LVDS 1_ DATA1 P

18.LVDS 1_ DATA0 P

16.G ND

14.LVDS _V DDEN

12.L DDC_DATA

10.L CD_VDD

8.GN D

6.GN D

4.+1 2V

2.+1 2V

37.

LVDS2_D ATA 3 N

35.LVDS 2_ CKN

33.LVDS 2_ DATA 2 N

31.LVDS 2_ DATA1 N

29.LVDS 2_ DATA0 N

38.

LVDS2_D ATA 3 P

36.LVDS 2_ CKP

34.LVDS 2_ DATA 2 P

32.LVDS 2_ DATA1 P

30.LVDS 2_ DATA0 P

LCD Inverter Connector: JINV1

The connector is provided for LCD backlight options.

2.GND

3.

LVDS_BLON

4.

L_BKLT_CTRL#

5.VCC5

1.+12V

2-15

MX255D

FRONT AUDIO CONNECTOR: JAUD1

This connector allows you to connect the front panel audio and is compliant
with Intel® Front Panel I/O Connectivity Design Guide.

1.MIC L

3.MIC R

1

0.Head Phone Detection

5.Head Phone R

7.SENSE_SEND

9.Head Phone

L

8.No Pin

6.MIC Detection

4.PRESENCE#

2.Ground

2-16

▍ Hardware Setup

Jumper

Jumper

CLEAR CMOS JUMPER: JBAT1

There is a CMOS RAM onboard that has a power supply from an external
battery to keep the data of system confi guration. With the CMOS RAM, the
system can automatically boot OS every time it is turned on. If you want to
clear the system confi guration, set the jumper to clear data.

JBAT1

11

Normal

Clear CMOS

1

Important

Important

You can clear CMOS by shorting 2-3 pin while the system is off. Then return
to 1-2 pin position. Avoid clearing the CMOS while the system is on; it will
damage the mainboard.

2-17

MX255D

COM POWER SELECT JUMPER: JCOMP1 ~
JCOMP6

These jumpers are used to select the pin 9 power voltage of the COM1 ~
COM6 serial ports.

JCOMP1~6

11

+5V +12V

1

LVDS Power Jumper: JVDD1

The LVDS power jumper allows users to select the operation voltage of the
LVDS fl at panel.

JVDD1

11

3V

5V

1

AT/ATX Select Jumper: J1

This jumper allows users to select between AT and ATX power.

J1

11

AT

ATX

(Default)

1

2-18

▍ Hardware Setup

Slot

Slot

MINI PCI-E (PERIPHERAL COMPONENT INTERCON­NECT EXPRESS) SLOT

The Mini PCI-E slot is provided for wireless LAN card, TV tuner card, and
Robson NAND Flash card.

Important

Important

When adding or removing expansion cards, make sure that you unplug the
power supply fi rst. Meanwhile, read the documentation for the expansion
card to confi gure any necessary hardware or software settings for the ex-
pansion card, such as jumpers, switches or BIOS confi guration.

PCI (PERIPHERAL COMPONENT INTERCONNECT)
SLOT

The PCI slot supports LAN card, SCSI card, USB card, and other add-on

COMPACTFLASH SOCKET

This socket supports CompactFlash cards.

This chapter provides information on the BIOS Setup
program and allows you to confi gure the system for
optimum use.

You may need to run the Setup program when:

■ An error message appears on the screen

during the system booting up, and requests
you to run SETUP.

■ You want to change the default settings for

customized features.

Chapter 3

BIOS Setup

3-2

▍ BIOS Setup

Entering Setup

Entering Setup

Power on the computer and the system will start POST (Power On Self Test)
process. When the message below appears on the screen, press <DEL>
key to enter Setup.

PRESS DEL TO ENTER SETUP

If the message disappears before you respond and you still wish to enter
Setup, restart the system by turning it OFF and On or pressing the RESET
button. You may also restart the system by simultaneously pressing <Ctrl>,
<Alt>, and <Delete> keys.

3-3

MX255D

CONTROL KEYS

← → Select Screen

↑ ↓ Select Item

+ - Change Field

Tab Select Field

F1 General Help

F10 Save and Exit

Esc Exit

GETTING HELP

After entering the Setup menu, the fi rst menu you will see is the Main
Menu.

Main Menu

The main menu lists the setup functions you can make changes to. You can
use the arrow keys ( ↑↓ ) to select the item. The on-line description of the
highlighted setup function is displayed at the bottom of the screen.

Sub-Menu

If you fi nd a right pointer symbol appears to the left of certain fi elds that
means a sub-menu can be launched from this fi eld. A sub-menu contains
additional options for a fi eld parameter. You can use arrow keys ( ↑↓ ) to
highlight the fi eld and press <Enter> to call up the sub-menu. Then you can
use the control keys to enter values and move from fi eld to fi eld within a
sub-menu. If you want to return to the main menu, just press the <Esc >.

GENERAL HELP <F1>

The BIOS setup program provides a General Help screen. You can call up
this screen from any menu by simply pressing <F1>. The Help screen lists
the appropriate keys to use and the possible selections for the highlighted
item. Press <Esc> to exit the Help screen.

3-4

▍ BIOS Setup

The Menu Bar

The Menu Bar

▶ Main

Use this menu for basic system confi gurations, such as time, date etc.

▶ Advanced

Use this menu to set up the items of special enhanced features.

▶ Boot

Use this menu to specify the priority of boot devices.

▶ Security

Use this menu to set supervisor and user passwords.

▶ Chipset

This menu controls the advanced features of the onboard Northbridge and
Southbridge.

▶ Power

Use this menu to specify your settings for power management.

▶ Exit

This menu allows you to load the BIOS default values or factory default set­tings into the BIOS and exit the BIOS setup utility with or without changes.

3-5

MX255D

Main

Main

▶ System Time

This setting allows you to set the system time. The time format is <Hour>
<Minute> <Second>.

▶ System Date

This setting allows you to set the system date. The date format is <Day>,
<Month> <Date> <Year>.

▶ SATA1, SATA2

[Type] Press PgUp/<+> or PgDn/<-> to select

[Manual], [None] or [Auto] type. Note that the
specifi cations of your drive must match with
the drive table. The hard disk will not work
properly if you enter improper information for
this category. If your hard disk drive type is
not matched or listed, you can use [Manual] to
defi ne your own drive type manually.

3-6

▍ BIOS Setup

[LBA/Large
Mode]

Enabling LBA causes Logical Block Address­ing to be used in place of Cylinders, Heads
and Sectors

[Block
(Multi-Sector
Transfer)]

Any selection except Disabled determines the
number of sectors transferred per block

[PIO Mode] Indicates the type of PIO (Programmed

Input/Output)

[DMA Mode] Indicates the type of Ultra DMA

[S.M.A.R.T.] This allows you to activate the S.M.A.R.T.

(Self-Monitoring Analysis & Reporting Technol­ogy) capability for the hard disks. S.M.A.R.T
is a utility that monitors your disk status to
predict hard disk failure. This gives you an
opportunity to move data from a hard disk that
is going to fail to a safe place before the hard
disk becomes offl ine.

[32 Bit Data
Transfer]

Enables 32-bit communication between
CPU and IDE controller

▶ SATA Mode Selection

This setting specifi es the SATA controller mode.

3-7

MX255D

Advanced

Advanced

▶ Quick Boot

Enabling this setting will cause the BIOS power-on self test routine to skip
some of its tests during bootup for faster system boot.

▶ Bootup Num-Lock

This setting is to set the Num Lock status when the system is powered on.
Setting to [On] will turn on the Num Lock key when the system is powered
on. Setting to [Off] will allow users to use the arrow keys on the numeric
keypad.

▶ Option ROM Messages

This item is used to determine the display mode when an optional ROM is
initialized during POST. When set to [Force BIOS], the display mode used
by AMI BIOS is used. Select [Keep Current] if you want to use the display
mode of optional ROM.

3-8

▍ BIOS Setup

▶ CPU Confi guration

▶ Hyper-Threading

The processor uses Hyper-Threading technology to increase transac­tion rates and reduces end-user response times. The technology treats
the two cores inside the processor as two logical processors that can
execute instructions simultaneously. In this way, the system perfor­mance is highly improved. If you disable the function, the processor will
use only one core to execute the instructions. Please disable this item if
your operating system doesn’t support HT Function, or unreliability and
instability may occur.

▶ Execute Disable Bit

Intel’s Execute Disable Bit functionality can prevent certain classes of
malicious “buffer overfl ow” attacks when combined with a supporting
operating system. This functionality allows the processor to classify
areas in memory by where application code can execute and where it
cannot. When a malicious worm attempts to insert code in the buffer,
the processor disables code execution, preventing damage or worm
propagation.

▶ Limit CPUID Maximum

The Max CPUID Value Limit BIOS feature allows you to circumvent
problems with older operating systems that do not support the Intel
Pentium 4 processor with Hyper-Threading Technology. When enabled,
the processor will limit the maximum CPUID input value to 03h when
queried, even if the processor supports a higher CPUID input value.

3-9

MX255D

When disabled, the processor will return the actual maximum CPUID
input value of the processor when queried.

▶ Super IO Confi guration

▶ Serial Port 1/ 2/ 3/ 4/ 5/ 6/ Parallel Port Address

Select an address for the specifi ed serial/parallel port.

▶ Change Settings Serial Port 1/ 2/ 3/ 4/ 5/ 6 /Parallel Port

This setting is used to change the address & IRQ settings of the
specifi ed serial port.

▶ Mode Select

Select an operation mode for the serial port 1.

▶ Watch Dog

You can enable the system watch-dog timer, a hardware timer that gen­erates a reset when the software that it monitors does not respond as
expected each time the watch dog polls it.

3-10

▍ BIOS Setup

▶ Hardware Health Confi guration

These items display the current status of all monitored hardware devices/com­ponents such as voltages, temperatures and all fans’ speeds.

▶ Smart Fan Confi guration

▶ SYSFAN1 / 2 Type

This setting specifi es the fan type.

▶ Smart SYSFAN1 / 2 Function

This setting enables/disables the Smart Fan function. Smart Fan is an
excellent feature which will adjust the CPU/system fan speed automati­cally depending on the current CPU/system temperature, avoiding the
overheating to damage your system.

3-11

MX255D

▶ PCI/PCIE Device Confi guration

▶ PCI Latency Timer

This item controls how long each PCI device can hold the bus before
another takes over. When set to higher values, every PCI device can
conduct transactions for a longer time and thus improve the effective
PCI bandwidth. For better PCI performance, you should set the item
to higher values.

▶ USB Support

This setting enables/disables the onboard USB controller.

▶ Legacy USB Support

Set to [Enabled] if you need to use any USB 1.1/2.0 device in the op­erating system that does not support or have any USB 1.1/2.0 driver
installed, such as DOS and SCO Unix.

▶ Audio Controller

This setting enables/disables the onboard audio controller.

▶ Launch PXE OpROM / Launch Storage OpROM

This setting enables/disables the initialization of the onboard LAN
Boot ROM during bootup. Selecting [Disabled] will speed up the boot
process.

3-12

▍ BIOS Setup

▶ Console Redirection

▶ Console Redirection Settings

Console Redirection operates in host systems that do not have a moni­tor and keyboard attached. This setting enables/disables the opera­tion of console redirection. When set to [Enabled], BIOS redirects and
sends all contents that should be displayed on the screen to the serial
COM port for display on the terminal screen. Besides, all data received
from the serial port is interpreted as keystrokes from a local keyboard.

▶ GPIO Confi guration

▶ GPO 1/2/3/4 Data

This setting specifi es the GPO data.

3-13

MX255D

Boot

Boot

▶ Boot Option #1 / 2 / 3

This setting allows users to set the sequence of boot devices where BIOS
attempts to load the disk operating system.

▶ Hard Drive BBS Priorities

This setting allows users to set the priority of the specifi ed devices. First
press <Enter> to enter the sub-menu. Then you may use the arrow keys ( ↑
↓ ) to select the desired device, then press <+>, <-> or <PageUp>, <Page­Down> key to move it up/down in the priority list.

3-14

▍ BIOS Setup

Security

Security

▶ Administrator Password

Administrator Password controls access to the BIOS Setup utility.

▶ User Password

User Password controls access to the system at boot and to the BIOS Setup
utility.

▶ Chassis Intrusion

The fi eld enables or disables the feature of recording the chassis intrusion
status and issuing a warning message if the chassis is once opened. To
clear the warning message, set the fi eld to [Reset]. The setting of the fi eld
will automatically return to the default value later.

3-15

MX255D

▶ Trusted Computing

▶ TCG/TPM Support

This setting controls the Trusted Platform Module (TPM) designed by
the Trusted Computing Group (TCG). TPMs are special-purpose inte­grated circuits (ICs) built into a variety of platforms to enable strong
user authentication and machine attestation - essential to prevent inap­propriate access to confi dential and sensitive information and to protect
against compromised networks.

3-16

▍ BIOS Setup

Chipset

Chipset

▶ IGFX - Boot Type

Use the fi eld to select the type of device you want to use as the boot display
of the system.

▶ DP Panel Type

This setting allows you to set your preferences for the boot display device.

▶ Fixed Graphics Memory Size

This setting specifi es the size of system memory allocated for video memory.

3-17

MX255D

Power

Power

▶ ACPI Sleep State

This item specifi es the power saving modes for ACPI function. If your oper-
ating system supports ACPI, you can choose to enter the Standby mode in
S1 (POS) or S3 (STR) fashion through the setting of this fi eld.

▶ Restore on AC Power Loss

This setting specifi es whether your system will reboot after a power failure
or interrupt occurs. Available settings are:

[Power Off] Leaves the computer in the power off state.

[Power On] Leaves the computer in the power on state.

[Last State] Restores the system to the previous status before

power failure or interrupt occurred.

▶ Resume On USB from S3/S4

The item allows the activity of the USB device to wake up the system from
S3/S4 sleep state.

3-18

▍ BIOS Setup

▶ Resume On PCIE/PCI PME

This fi eld specifi es whether the system will be awakened from power sav-
ing modes when activity or input signal of onboard PCIE/PCI PME is de­tected.This fi eld specifi es whether the system will be awakened from power
saving modes when activity or input signal of onboard LAN/mini PCI-E is
detected.

▶ Resume On RTC Alarm

When [Enabled], your can set the date and time at which the RTC (real-time
clock) alarm awakens the system from suspend mode.

3-19

MX255D

Exit

Exit

▶ Save Changes and Exit

Save changes to CMOS and exit the Setup Utility.

▶ Discard Changes and Exit

Abandon all changes and exit the Setup Utility.

▶ Restore Defaults

Restore the factory defaults.

▶ Save as User Defaults

Save all changes as user defaults.

▶ Restore User Defaults

Restore the preset user defaults.

This chapter provides information on system re­sources.

Chapter 4

System Resources

4-2

▍ System Resources

AMI POST Code

AMI POST Code

Bootblock Initialization Code Checkpoints

The Bootblock initialization code sets up the chipset, memory and other
components before system memory is available. The following table de­scribes the type of checkpoints that may occur during the bootblock initial­ization portion of the BIOS:

Checkpoint Description

Before D1

Early chipset initialization is done. Early super I/O initialization is done
including RTC and keyboard controller. NMI is disabled.

D1

Perform keyboard controller BAT test. Check if waking up from power
management suspend state. Save power-on CPUID value in scratch
CMOS.

D0

Go to fl at mode with 4GB limit and GA20 enabled. Verify the bootblock
checksum.

D2

Disable CACHE before memory detection. Execute full memory sizing
module. Verify that fl at mode is enabled.

D3

If memory sizing module not executed, start memory refresh and do
memory sizing in Bootblock code. Do additional chipset initialization.
Re-enable CACHE. Verify that fl at mode is enabled.

D4

Test base 512KB memory. Adjust policies and cache fi rst 8MB. Set
stack.

D5

Bootblock code is copied from ROM to lower system memory and con­trol is given to it. BIOS now executes out of RAM.

D6

Both key sequence and OEM specifi c method is checked to determine
if BIOS recovery is forced. Main BIOS checksum is tested. If BIOS
recovery is necessary, control fl ows to checkpoint E0. See Bootblock
Recovery Code Checkpoints section of document for more informa­tion.

D7

Restore CPUID value back into register. The Bootblock-Runtime in­terface module is moved to system memory and control is given to it.
Determine whether to execute serial fl ash.

D8

The Runtime module is uncompressed into memory. CPUID informa­tion is stored in memory.

D9

Store the Uncompressed pointer for future use in PMM. Copying Main
BIOS into memory. Leaves all RAM below 1MB Read-Write including
E000 and F000 shadow areas but closing SMRAM.

4-3

MX255D

POST Code Checkpoints

The POST code checkpoints are the largest set of checkpoints during the
BIOS pre-boot process. The following table describes the type of check­points that may occur during the POST portion of the BIOS:

Checkpoint Description

03

Disable NMI, Parity, video for EGA, and DMA controllers. Initialize
BIOS, POST, Runtime data area. Also initialize BIOS modules on
POST entry and GPNV area. Initialized CMOS as mentioned in the
Kernel Variable “wCMOSFlags.”

04

Check CMOS diagnostic byte to determine if battery power is OK and
CMOS checksum is OK. Verify CMOS checksum manually by read­ing storage area. If the CMOS checksum is bad, update CMOS with
power-on default values and clear passwords. Initialize status register
A. Initializes data variables that are based on CMOS setup questions.
Initializes both the 8259 compatible PICs in the system

05

Initializes the interrupt controlling hardware (generally PIC) and inter­rupt vector table.

06

Do R/W test to CH-2 count reg. Initialize CH-0 as system timer. Install
the POSTINT1Ch handler. Enable IRQ-0 in PIC for system timer inter­rupt. Traps INT1Ch vector to “POSTINT1ChHandlerBlock.”

08

Initializes the CPU. The BAT test is being done on KBC. Program the
keyboard controller command byte is being done after Auto detection
of KB/MS using AMI KB-5.

0A Initializes the 8042 compatible Key Board Controller.

0B Detects the presence of PS/2 mouse.

0C Detects the presence of Keyboard in KBC port.

0E

Testing and initialization of different Input Devices. Also, update the
Kernel Variables. Traps the INT09h vector, so that the POST INT09h
handler gets control for IRQ1. Uncompress all available language,
BIOS logo, and Silent logo modules.

4-4

▍ System Resources

Checkpoint Description

13 Early POST initialization of chipset registers.

24 Uncompress and initialize any platform specifi c BIOS modules.

30 Initialize System Management Interrupt.

2A

Initializes different devices through DIM. See DIM Code Checkpoints
section of document for more information.

2C

Initializes different devices. Detects and initializes the video adapter
installed in the system that have optional ROMs.

2E Initializes all the output devices.

31

Allocate memory for ADM module and uncompress it. Give control to
ADM module for initialization. Initialize language and font modules for
ADM. Activate ADM module.

33

Initializes the silent boot module. Set the window for displaying text
information.

37

Displaying sign-on message, CPU information, setup key message,
and any OEM specifi c information.

38

Initializes different devices through DIM. See DIM Code Checkpoints
section of document for more information.

39 Initializes DMAC-1 & DMAC-2.

3A Initialize RTC date/time.

3B

Test for total memory installed in the system. Also, Check for DEL or
ESC keys to limit memory test. Display total memory in the system.

3C Mid POST initialization of chipset registers.

40

Detect different devices (Parallel ports, serial ports, and coprocessor
in CPU, … etc.) successfully installed in the system and update the
BDA, EBDA…etc.

50

Programming the memory hole or any kind of implementation that
needs an adjustment in system RAM size if needed.

52

Updates CMOS memory size from memory found in memory test. Al­locates memory for Extended BIOS Data Area from base memory.

60 Initializes NUM-LOCK status and programs the KBD typematic rate.

75 Initialize Int-13 and prepare for IPL detection.

78 Initializes IPL devices controlled by BIOS and option ROMs.

7A Initializes remaining option ROMs.

7C Generate and write contents of ESCD in NVRam.

4-5

MX255D

Checkpoint Description

84 Log errors encountered during POST.

85 Display errors to the user and gets the user response for error.

87 Execute BIOS setup if needed / requested.

8C Late POST initialization of chipset registers.

8E Program the peripheral parameters. Enable/Disable NMI as selected

90 Late POST initialization of system management interrupt.

A0 Check boot password if installed.

A1 Clean-up work needed before booting to OS.

A2

Takes care of runtime image preparation for different BIOS modules. Fill
the free area in F000h segment with 0FFh.

Initializes the Microsoft IRQ Routing Table. Prepares the runtime lan­guage module. Disables the system confi guration display if needed.

A4 Initialize runtime language module.

A7

Displays the system confi guration screen if enabled. Initialize the CPU’s
before boot, which includes the programming of the MTRR’s.

A8 Prepare CPU for OS boot including fi nal MTRR values.

A9 Wait for user input at confi g display if needed.

AA

Uninstall POST INT1Ch vector and INT09h vector. Deinitializes the
ADM module.

AB Prepare BBS for Int 19 boot.

AC End of POST initialization of chipset registers.

B1 Save system context for ACPI.

00 Passes control to OS Loader (typically INT19h).

4-6

▍ System Resources

Resource List

Resource List

ICH8M GPIO

4-7

MX255D

SIO GPIO

4-8

▍ System Resources

GPIO Programming

GPIO Programming

Please refer to the “F81865 Super IO spec” for the GPIO pin function:

“Pin3-GPI00” Status:addr F2 bit0

“Pin4-GPO04” Status:addr F2 bit4, Setting:addr F1 bit4

“Pin5-GPI01” Status:addr F2 bit1

“Pin6-GPO50” Status:addr A2 bit0, Setting:addr A1 bit0

“Pin7-GPI02” Status:addr F2 bit2

“Pin8-GPO51” Status:addr A2 bit1, Setting:addr A1 bit1

“Pin9-GPI03” Status:addr F2 bit3

“Pin10-GPO52” Status:addr A2 bit2, Setting:addr A1 bit2

Note: GPIO pin connection design with 4 input and 4 output pins.

GPI is design for input, GPO is design for output

Example 1: Read data from GPIO “Pin3-GPI00”,

// the “Pin3-GPI00” status value is at address F2 bit 0,

Step 1. Enable SIO confi guration mode without timeout in between commands

Out(0x4e, 0x87); // (port, value), 0x4e for index

Out(0x4e, 0x87);

Step 2. Select LDN06 (GPIO) (LDN: Logic device number)

Out(0x4e, 0x07); // select entry page, 0x4e for index

Out(0x4f, 0x06); // select LDN06, 0x4f for data

Step 3. Set address to 0xF2

Out(0x4e, 0xF2); // 0x4e for index

Step 4. Get input data from port 0x4f

if (Inp(0x4f) & 0x01) !=0 ) // 0x4f for data, & 0x01 for bit0 of GPI00 input data

value = “high”;

else

value = “low”;

4-9

MX255D

Example 2: Set GPIO “Pin4-GPO04” output to “high”,

// the “Pin4-GPO04” output setting is at address F1 bit 4,

Step 1. Enable SIO confi guration mode without timeout in between commands

Out(0x4e, 0x87); // (port, value), 0x4e for index

Out(0x4e, 0x87);

Step 2. Select LDN06 (GPIO) (LDN: Logic device number)

Out(0x4e, 0x07); // select entry page, 0x4e for index

Out(0x4f, 0x06); // select LDN06, 0x4f for data

Step 3. Set address to 0xF1

Out(0x4e, 0xF1); //0x4e for index

Step 4. Get data from port 0x4f (Save current state)

Byte tmp = Inp(0x4f); //Read current data for adding the output in bit4

Step 5. Write data to port 0x4f (only set bit 4 to “high” and write back)

Out(0x4f, tmp|0x10); //0x4f for data

Example 3: Set GPIO “Pin4-GPO04” output to “low”,

// the “Pin4-GPO04” output setting is at address F1 bit 4,

Step 1. Enable SIO confi guration mode without timeout in between commands

Out(0x4e, 0x87); // (port, value), 0x4e for index

Out(0x4e, 0x87);

Step 2. Select LDN06 (GPIO) (LDN: Logic device number)

Out(0x4e, 0x07); // select entry page, 0x4e for index

Out(0x4f, 0x06); // select LDN06, 0x4f for data

Step 3. Set address to 0xF1

Out(0x4e, 0xF1); //0x4e for index

4-10

▍ System Resources

Step 4. Get data from port 0x4f (Save current state)

Byte tmp = Inp(0x4f); //Read current data for adding the output in bit4

Step 5. Write data to port 0x4f (only set bit 4 to “low” and write back)

Out(0x4f, tmp&0xEF);