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Summary of Contents for BCM MX255D
- Page 1 MX255D User’s Manual 3rd Generation Intel® Atom™ D2550 Fanless Mini ITX Motherboard (Cedar Trail Platform) supports 12V DC Power...
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Page 2: Trademarks
▍ Preface Copyright Notice Copyright 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. -
Page 3: Safety Instructions
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. -
Page 4: Ce Conformity
▍ 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. -
Page 5: Weee Statement
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 manufactur- ers of covered electronic equipment will be obligated to take back such products at the end of their useful life. - Page 6 ▍ 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, Di- rektiva 2002/96/EC, koja stupa na snagu od 13. Avgusta 2005, proizvodi koji spadaju pod “elektronsku i električnu opremu”...
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Page 7: Table Of Contents
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 ............... -
Page 8: Overview
Chapter 1 Overview Thank you for choosing the MX255D, an excellent in- dustrial computer board from BCM. Based on the innovative Intel NM10 chipset for op- ® timal system effi ciency, the MX255D accommodates the Intel Cedarview-D processor and supports up to ®... -
Page 9: Mainboard Specifi Cations
▍ Overview Mainboard Specifi cations Mainboard Specifi cations ■ Intel Cedarview-D D2550 processor ■ North Bridge: integrated with CPU Chipset ■ South Bridge: Intel NM10 chipset ■ 2 DDR3 1066MHz Unbuffered, non-ECC SO-DIMM Memory slots, supporting the maximum of 4GB ■... - Page 10 MX255D ■ 2 SATA 3Gb/s ports Onboard ■ 2 USB 2.0 pinheaders (3 ports) Connec- ■ 1 LVDS connector tors/ Pin- ■ 1 LVDS inverter connector headers ■ 4 serial port connectors ■ 6 serial port power select jumpers ■ 1 parallel port connector ■...
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Page 11: Mainboard Layout
▍ Overview Mainboard Layout Mainboard Layout JVDD1 CPUFAN1 JSEL1 JINV1 JLVDS1 JPWR1 JKB_MS1 Top: JCOMP1 JCOMP2 COM1 JCOMP3 Bottom: JCOMP4 JCOMP5 COM2 JCOMP6 JLPT1 Top: VGA Port Bottom: DVI-D Port CON1 JPWR2 Top: LAN Jack JCI1 JUSB1 Bottom: USB Ports Top: LAN Jack Bottom: USB Ports T: Line-In... -
Page 12: Hardware Setup
Chapter 2 Hardware Setup This chapter provides you with the information on mainboard hardware confi gurations. Incorrect setting of jumpers and connectors may damage your main- board. Please pay special attention not to connect these headers in wrong direction. DO NOT adjust any jumper while the mainboard is powered on. -
Page 13: Quick Components Guide
▍ Hardware Setup Quick Components Guide Quick Components Guide Fan Power COM Power Select Connector, Jumper, p.2-17 p.2-9 LVDS Connector, p.2-14 LVDS Inverter AT/ATX Power Select Connector, p.2-14 DC Power Jumper, p.2-17 Connector, Keyboard/Mouse LVDS Power p.2-4 Connector, p.2-10 Jumper, p.2-17 Back Panel I/O, p.2-5 DIMM Slot,... -
Page 14: Memory
MX255D Memory Memory INSTALLING MEMORY MODULES Locate the SO-DIMM slot. Align the notch on the DIMM with the key on the slot and insert the DIMM into the slot. Push the DIMM gently downwards until the slot levers click and lock the DIMM in place. -
Page 15: Power Supply
▍ Hardware Setup Power Supply Power Supply DC POWER CONNECTOR: JPWR1 This DC-In connector provides 12V power input. SATA Power Connector: JPWR2 This DC-In connector provides DC power output for SATA devices. -
Page 16: Back Panel I/O
MX255D Back Panel I/O Back Panel I/O Line-In Jack LAN Jack LAN Jack RS-232/422/485 VGA Port Serial Port DC Powr Jack RS-232 DVI-D Port USB 2.0 Ports USB 2.0 Ports Line-Out Jack Serial Port Mic Jack ▶ DC Power Jack ▶... - Page 17 ▍ Hardware Setup RS-422 SIGNAL DESCRIPTION 422 TXD- Transmit Data, Negative 422 RXD+ Receive Data, Positive 422 TXD+ Transmit Data, Positive 422 RXD- Receive Data, Negative Signal Ground No Connection No Connection No Connection No Connection RS-485 SIGNAL DESCRIPTION 485 TXD- Transmit Data, Negative No Connection 485 TXD+...
- Page 18 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.
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Page 19: Connector
▍ 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. - Page 20 MX255D AUDIO AMPLIFIER CONNECTOR: JAMP1 The JAMP1 is used to connect audio amplifi ers to enhance audio perfor- mance. 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;...
- Page 21 ▍ Hardware Setup KEYBOARD/MOUSE CONNECTOR: JKB_MS1 This connector is used to connect PS/2 keyboard & mouse. 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 Con- nectivity Design Guide.
- Page 22 MX255D 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. Important Important Note that the pins of VCC and GND must be connected correctly to avoid possible damage.
- Page 23 ▍ Hardware Setup GPIO CONNECTOR: JGPIO1 This connector is provided for the General-Purpose Input/Output (GPIO) peripheral module. 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 sup- ports Enhanced Parallel Port (EPP) and Extended Capabilities Parallel Port (ECP) mode.
- Page 24 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. SIGNAL DESCRIPTION...
- Page 25 ▍ Hardware Setup LVDS Connector: JLVDS1 The LVDS (Low Voltage Differential Signal) connector provides a digital in- terface typically used with flat panels. After connecting an LVDS interface flat panel to the JLVDS1, be sure to check the panel datasheet and set the JVDD1 jumper to proper power voltage.
- Page 26 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. 2-15...
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Page 27: Jumper
▍ 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... - Page 28 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 +12V LVDS Power Jumper: JVDD1 The LVDS power jumper allows users to select the operation voltage of the LVDS fl...
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Page 29: Slot
▍ Hardware Setup Slot Slot MINI PCI-E (PERIPHERAL COMPONENT INTERCON- NECT EXPRESS) SLOT The Mini PCI-E slot is provided for wireless LAN card, TV tuner card, and Robson NAND Flash card . 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. -
Page 30: Bios Setup
Chapter 3 BIOS Setup 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. -
Page 31: Entering Setup
▍ 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. -
Page 32: Control Keys
MX255D CONTROL KEYS ← → Select Screen ↑ ↓ Select Item Change Field Select Field General Help Save and Exit 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. -
Page 33: The Menu Bar
▍ 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. -
Page 34: Main
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>. - Page 35 ▍ BIOS Setup [LBA/Large Enabling LBA causes Logical Block Address- Mode] ing to be used in place of Cylinders, Heads and Sectors [Block Any selection except Disabled determines the (Multi-Sector number of sectors transferred per block Transfer)] [PIO Mode] Indicates the type of PIO (Programmed Input/Output) [DMA Mode] Indicates the type of Ultra DMA...
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Page 36: Advanced
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. - Page 37 ▍ BIOS Setup ▶ CPU Confi guration ▶ Hyper-Threading The processor uses Hyper-Threading technology to increase transac- tion 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 perfor- mance is highly improved.
- Page 38 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.
- Page 39 ▍ BIOS Setup ▶ Hardware Health Confi guration These items display the current status of all monitored hardware devices/com- ponents such as voltages, temperatures and all fans’ speeds. ▶ Smart Fan Confi guration ▶ SYSFAN1 / 2 Type This setting specifi es the fan type. ▶...
- Page 40 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.
- Page 41 ▍ BIOS Setup ▶ Console Redirection ▶ Console Redirection Settings Console Redirection operates in host systems that do not have a moni- tor and keyboard attached. This setting enables/disables the opera- tion 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.
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Page 42: Boot
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>... -
Page 43: Security
▍ 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. - Page 44 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 inte- grated circuits (ICs) built into a variety of platforms to enable strong user authentication and machine attestation - essential to prevent inap- propriate access to confi...
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Page 45: Chipset
▍ 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. ▶... -
Page 46: Power
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. - Page 47 ▍ 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 de- tected.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.
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Page 48: Exit
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. -
Page 50: System Resources
Chapter 4 System Resources This chapter provides information on system re- sources. -
Page 51: Ami Post Code
▍ 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 de- scribes the type of checkpoints that may occur during the bootblock initial- ization portion of the BIOS: Checkpoint Description... -
Page 52: Post Code Checkpoints
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 check- points that may occur during the POST portion of the BIOS: Checkpoint Description Disable NMI, Parity, video for EGA, and DMA controllers. - Page 53 ▍ System Resources Checkpoint Description Early POST initialization of chipset registers. Uncompress and initialize any platform specifi c BIOS modules. Initialize System Management Interrupt. Initializes different devices through DIM. See DIM Code Checkpoints section of document for more information. Initializes different devices. Detects and initializes the video adapter installed in the system that have optional ROMs.
- Page 54 MX255D Checkpoint Description Log errors encountered during POST. Display errors to the user and gets the user response for error. Execute BIOS setup if needed / requested. Late POST initialization of chipset registers. Program the peripheral parameters. Enable/Disable NMI as selected Late POST initialization of system management interrupt.
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Page 55: Resource List
▍ System Resources Resource List Resource List ICH8M GPIO... - Page 56 MX255D SIO GPIO...
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Page 57: Gpio Programming
▍ 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”... - Page 58 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);...
- Page 59 ▍ 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);...
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