STX88831 Series Intel Atom™ N270 Processor STX Form Factor SoM User’s Manual
Disclaimers This manual has been carefully checked and believed to contain accurate information. AXIOMTEK Co., Ltd. assumes no responsibility for any infringements of patents or any third party’s rights, and any liability arising from such use. AXIOMTEK does not warrant or assume any legal liability or responsibility for the accuracy, completeness or usefulness of any information in this document. AXIOMTEK does not make any commitment to update the information in this manual.
ESD Precautions Computer boards have integrated circuits sensitive to static electricity. To prevent chipsets from electrostatic discharge damage, please take care of the following jobs with precautions: Do not remove boards or integrated circuits from their anti-static packaging until you are ready to install them. Before holding the board or integrated circuit, touch an unpainted portion of the system unit chassis for a few seconds. It discharges static electricity from your body.
Table of Contents Disclaimers ........................................................................................................... ii ESD Precautions ................................................................................................. iii CHAPTER 1 INTRODUCTION ..................................................................................... 1 1.1 Specifications ........................................................................................... 2 1.2 Utilities Supported .....
STX88831 STX Evaluation Platform Module Series User’s Manual CHAPTER 1 INTRODUCTION The STX88831 is a STX form factor SoM (System-On-a-Module) to support Intel® Atom™ N270 processor with FSB 533 MHz. It integrates Intel® 945GSE & ICH7M chipsets, designed with the spacelimited applications in mind. In addition of onboard features which are integrated on STX88831, the STX standard interface provides 4 PCI Masters and ISA output for expansion design purpose applied on the related Baseboard.
STX88831 STX Evaluation Platform Module Series User’s Manual 1.
STX88831 STX Evaluation Platform Module Series User’s Manual USB Interface Four USB ports with fuse protection and complies with USB Spec. Rev. 2.
STX88831 STX Evaluation Platform Module Series User’s Manual 1.
STX88831 STX Evaluation Platform Module Series User’s Manual CHAPTER 2 JUMPERS AND CONNECTORS 2.
STX88831 STX Evaluation Platform Module Series User’s Manual Solder Side 6 Jumpers and Connectors
STX88831 STX Evaluation Platform Module Series User’s Manual 2.
STX88831 STX Evaluation Platform Module Series User’s Manual Solder Side 8 Jumpers and Connectors
STX88831 STX Evaluation Platform Module Series User’s Manual 2.3 Jumper Settings Proper jumer settings configure the STX88831 to meet your application purpose. We are herewith listing a summary table of all jumpers and default settings for onboard devices, respectively. Jumper Default Setting Jumper Setting JP1 LVDS Voltage Selection Default： 3.
STX88831 STX Evaluation Platform Module Series User’s Manual 2.3.2 CMOS Clear Jumper (JP2) You may need to use this jumper is to clear the CMOS memory if incorrect settings in the Setup Utility. Descriptio Function n CMOS Normal Clear (Default) Jumper Setting Clear CMOS 2.3.
STX88831 STX Evaluation Platform Module Series User’s Manual 2.4 Connectors The connectors allow the CPU Board to connect with other parts of the system. Some problems encountered by your system may be a result from loose or improper connections. Ensure that all connectors are in place and firmly attached. The following table lists the function of each connector on the STX88831.
STX88831 STX Evaluation Platform Module Series User’s Manual 2.4.1 LVDS Flat Panel Connector (FC1) The board has a 30-pin connector FC1 for LVDS Interface LCD. It is strongly recommended to use the matching Hirose DF19G-30P-1H 30pin connector for LVDS on the board.
STX88831 STX Evaluation Platform Module Series User’s Manual 2.4.2 Serial ATA Connector (SATA1) The SATA connector SATA1 is for high-speed SATA interface ports, and It can be connected to hard disk devices. Pin Signal 1 GND 2 SATA_TX+ 3 SATA_TX- 4 GND 5 SATA_RX- 6 SATA_RX+ 7 GND 2.4.
STX88831 STX Evaluation Platform Module Series User’s Manual SP1 SP2 Pin Description Pin Description Pin Description Pin Description 1 GND 2 NET_TXD+ 1 IDE_RESET# 2 GND 4 NET_TXD- 3 IDE_D7 4 ISA_ IOCHCK# 6 NET_CTREF 5 IDE_D8 6 ISA_SD7 3 5 NET_ACT_LE D# NET_LINK_LE D# 7 DISK_LED# 8 LAN_RXD+ 7 IDE_D6 8 ISA_ RSETDRV 9 SPEAKR 10 LAN_RXD- 9 IDE_D9 10 ISA_SD6 11 PCI_GNT3# 12 GND 11 IDE_D5 12 VCC_5V 13 RSTBTN# 14 VCC_5V_SBY 13 IDE_D10 14 ISA_SD5 15
STX88831 STX Evaluation Platform Module Series User’s Manual SP1 SP2 Pin Description Pin Description Pin Description Pin Description 41 VCC_5V 42 HW_VCORE 41 IDE_IOR# 42 ISA_ IOCHRDY 43 PCI_AD0 44 VCC_5V 43 IDE_IORDY 44 GND 45 PCI_AD1 46 VCC_5V 45 IDE_ACK# 46 ISA_ MEMCS16# 47 VCC_5V 48 PCI_AD2 47 IDE_A1 48 ISA_ SBHE# 49 PCI_AD4 50 PCI_AD5 49 IDE_A0 50 ISA_AEN 51 PCI_AD3 52 GND 51 IDE_A2 52 ISA_SMEMW# 53 GND 54 PCI_C/BE0# 53 IDE_CS0# 54 ISA_IO
STX88831 STX Evaluation Platform Module Series User’s Manual SP1 SP2 Pin Description Pin Description Pin Description Pin Description 81 PCI_LOCK# 82 PCI_STOP# 81 FDC_WP# 82 ISA_SA16 83 VCC_3.3V 84 VCC_3.3V 83 FDC_RDATA# 84 ISA_DACK3# 85 VCC_3.3V 86 VCC_3.
STX88831 STX Evaluation Platform Module Series User’s Manual SP1 SP2 Pin Description Pin Description Pin Description Pin Description 121 PCI_AD28 122 PCI_AD29 121 LPT_PE 122 ISA_SYSCLK 123 PCI_AD27 124 VCC_3.3V 123 LPT_SLCT 124 ISA_SA11 125 VCC_3.3V 126 VCC_3.
STX88831 STX Evaluation Platform Module Series User’s Manual SP1 SP2 Pin Description Pin Description Pin Description Pin Description 161 FP_DSEL 162 GND 161 USB0- 162 ISA_IRQ3 163 FP_VDD_EN 164 FP_CLK_P 163 USB0+ 164 ISA_SA6 165 FP_BSEL 166 GND 165 GND 166 ISA_SD13 167 FP_DATA_EN ABLE 168 FP_CLK_S 167 USB1- 168 VCC_5V 169 VCC_5V 170 VCC_5V 169 USB1+ 170 ISA_DACK2# 171 FP_D0 172 FP_D12 171 GND 172 ISA_SA5 174 ISA_SD14 176 ISA_ MASTER# 178 ISA_TC
STX88831 STX Evaluation Platform Module Series User’s Manual CHAPTER 3 HARDWARE DESCRIPTION 3.1 Microprocessors ® The STX88831 Series supports Intel Atom™ N270 processor, which make your system operated under Windows XP/Vista and Linux environments. The system performance depends on the microprocessor. Make sure your installed microprocessor with all correct settings that prevent the CPU from damages. 3.2 BIOS The STX88831 Series uses American Megatrends BIOS with 8Mbit SPI Flash, DMI, Plug and Play.
STX88831 STX Evaluation Platform Module Series User’s Manual 3.4 I/O Port Address Map There are total 1KB port addresses (under OS WinXP) available for assignment to other devices via I/O expansion cards.
STX88831 STX Evaluation Platform Module Series User’s Manual Address Devices CC00-CC0F CC80-CC83 D000-D007 D080-D083 D400-D407 Intel® 82801GBM/GHM (ICH7-M Family) Serial ATA Storage Controller D480-D4BF D800-D8FF Vinyl AC’97 codec Combo Driver (WDM) E000-EFFF Intel® 82801G (ICH7 Family) PCI Express Root Port EC00-ECFF Realtek PCIe FE Family Controller FFA0-FFAF Intel® 82801G (ICH7 Family) Ultra ATA Storage Controllers Hardware Description 21
STX88831 STX Evaluation Platform Module Series User’s Manual 3.5 Interrupt Controller The STX88831 Series is a 100% PC compatible control board. It consists of 16 interrupt request lines, and four out of them can be programmable. The mapping list of the 16 interrupt request lines is shown as the following table.
STX88831 STX Evaluation Platform Module Series User’s Manual 3.
STX88831 STX Evaluation Platform Module Series User’s Manual Address 24 Devices FEA40000FEA7FFFF Mobile Intel® 945 Express Chipset Family FEA80000FEAFFFFF Mobile Intel® 945 Express Chipset Family FEB00000FEAFFFFF Intel® 82801G (ICH7 Family) PCI Express Root Port FEBFF000FEBFFFFF Realtek PCIe FE Family Controller Hardware Description
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STX88831 STX Evaluation Platform Module Series User’s Manual CHAPTER 4 AMI BIOS UTILITY This chapter provides users with detailed description how to set up basic system configuration through the AMIBIOS8 BIOS setup utility. 4.1 Starting To enter the setup screens, follow the steps below: 1. 2. Turn on the computer and press the key immediately. After you press the key, the main BIOS setup menu displays.
STX88831 STX Evaluation Platform Module Series User’s Manual Left/Right The Left keys allow you to select a setup screen. Up/Down The Up and Down keys allow you to select a setup screen or sub-screen. + Plus/Minus The Plus and Minus keys allow you to change the field value of a particular setup item. Tab The key allows you to select setup fields. F1 The key allows you to display the General Help screen.
STX88831 STX Evaluation Platform Module Series User’s Manual 4.3 Main Menu When you first enter the Setup Utility, you will enter the Main setup screen. You can always return to the Main setup screen by selecting the Main tab. There are two Main Setup options. They are described in this section. The Main BIOS Setup screen is shown below. System Time/Date Use this option to change the system time and date. Highlight System Time or System Date using the keys.
STX88831 STX Evaluation Platform Module Series User’s Manual 4.4 Advanced Menu The Advanced menu allows users to set configuration of the CPU and other system devices.
STX88831 STX Evaluation Platform Module Series User’s Manual CPU Configuration This screen shows the CPU Configuration, and you can change the value of the selected option. 30 Execute-Disable Bit Capability This item helps you enable or disable the No-Execution Page Protection Technology. Hyper Threading Technology Use this item to enable or disable Hyper-Threading Technology, which makes a single physical processor perform multi-tasking function as two logical ones.
STX88831 STX Evaluation Platform Module Series User’s Manual Intel (R) C-STATE tech Use this item to enable or disable the C-State technology. Enhanced C-States This item allows you to enable or disable any available enhanced C-states ( C1E, C2E, C3E, C4E and Hard C4E). IDE Configuration You can use this screen to select options for the IDE Configuration, and change the value of the selected option. A description of the selected item appears on the right side of the screen.
STX88831 STX Evaluation Platform Module Series User’s Manual Legacy IDE Channels When the ATA/IDE Configuration is set to Compatible, this item will be displayed. Primary/Secondary IDE Master/Slave Select one of the hard disk drives to configure IDE devices installed in the system by pressing for more options. Floppy Configuration You can use this screen to select options for the Floppy Configuration, and change the value of the selected option.
STX88831 STX Evaluation Platform Module Series User’s Manual SuperIO Configuration You can use this screen to select options for the SuperIO Configuration, and change the value of the selected option. A description of the selected item appears on the right side of the screen. OnBoard Floppy Controller Use this item to enable or disable the onboard floppy drive controller. Serial Port1 Address This item specifies the base I/O port address and Interrupt Request address of serial port 1.
STX88831 STX Evaluation Platform Module Series User’s Manual Serial Port2 Address This item specifies the base I/O port address and Interrupt Request address of serial port 2. The Optimal setting is 2F8/IRQ3. The Fail-Safe setting is Disabled. Serial Port2 IRQ This item specifies the IRQ used by the serial port 2. Parallel Port Address This item allows you to determine the I/O address for onboard parallel port. There are several options for your selection.
STX88831 STX Evaluation Platform Module Series User’s Manual Hardware Health Configuration This screen shows the Hardware Health CPU Configuration, and a description of the selected item appears on the right side of the screen.
STX88831 STX Evaluation Platform Module Series User’s Manual ACPI Configuration You can use this screen to select options for the ACPI Configuration, and change the value of the selected option. A description of the selected item appears on the right side of the screen.
STX88831 STX Evaluation Platform Module Series User’s Manual General ACPI Configuration Scroll to this item and press to view the General ACPI Configuration sub menu, which contains General ACPI (Advanced Configuration and Power Management Interface) options for your configuration.
STX88831 STX Evaluation Platform Module Series User’s Manual 38 Advanced ACPI Configuration Scroll to this item and press to view the Advanced ACPI Configuration sub menu, which contains Advanced ACPI (Advanced Configuration and Power Management Interface) options for your configuration.
STX88831 STX Evaluation Platform Module Series User’s Manual APM Configuration You can use this screen to select options for the APM Configuration, and change the value of the selected option. A description of the selected item appears on the right side of the screen. Power Management/APM Set this item to allow Power Management/APM support. The default setting is Enabled.
STX88831 STX Evaluation Platform Module Series User’s Manual Video Power Down Mode This option specifies the Power State that the video subsystem enters when the BIOS places it in a power saving state after the specified period of display inactivity has expired. The default setting is Suspend. Disabled Standby Suspend 40 This setting prevents the BIOS from initiating any power saving modes concerned with the video display or monitor.
STX88831 STX Evaluation Platform Module Series User’s Manual Disabled 1 Min 4 Min 10 Min This setting prevents the system from entering suspend mode. This is the default setting. Set this item to allow the computer system to enter suspend mode after being inactive for 1 minute. Set this item to allow the computer system to enter suspend mode after being inactive for 4 minutes. Set this item to allow the computer system to enter suspend mode after being inactive for 10 minutes.
STX88831 STX Evaluation Platform Module Series User’s Manual MPS Configuration This screen shows the MPS (Multi Processor Specification) Configuration, and you can change its value. A description of the selected item appears on the right side of the screen. 42 MPS Revision Use this item to select MPS (Multi Processor Specification) Revision 1.1 or 1.4.
STX88831 STX Evaluation Platform Module Series User’s Manual USB Configuration You can use this screen to select options for the USB Configuration, and change the value of the selected option. A description of the selected item appears on the right side of the screen. USB 2.0 Controller Mode Use this item to configure the USB 2.0 controller. The default setting is HiSpeed. Legacy USB Support Use this item to enable or disable support for USB device on legacy operating system.
STX88831 STX Evaluation Platform Module Series User’s Manual 4.5 PCI PnP Menu The PCI PnP menu allows users to change the advanced settings for PCI/PnP devices.
STX88831 STX Evaluation Platform Module Series User’s Manual (2) Clear NVRAM Use this item to clear the data in the NVRAM (CMOS). Here are the options for your selection, No and Yes. Plug & Play O/S When the setting is No, Use this item to configure all the devices in the system. When the setting is Yes and if you install a Plug and Play operating system, the operating system configures the Plug and Play devices not required for boot. The default setting is No.
STX88831 STX Evaluation Platform Module Series User’s Manual 46 Palette Snooping Some old graphic controllers need to “snoop” on the VGA palette, and then map it to their display as a way to provide boot information and VGA compatibility. This item allows such snooping to take place. Here are the options for your selection, Disabled and Enabled. PCI IDE BusMaster This item is a toggle for the built-in driver that allows the onboard IDE controller to perform DMA (Direct Memory Access) transfer.
STX88831 STX Evaluation Platform Module Series User’s Manual 4.6 Boot Menu The Boot menu allows users to change boot options of the system. You can select any of the items in the left frame of the screen to go to the sub menus: Boot Settings Configuration LAN Boot Option For items marked with “”, please press for more options.
STX88831 STX Evaluation Platform Module Series User’s Manual Boot Settings Configuration 48 Quick Boot Enabling this item lets the BIOS skip some power on self tests (POST). The default setting is Enabled. Boot Num-Lock Use this item to select the power-on state for the NumLock. The default setting is On. PS/2 Mouse Support This item determines if the BIOS should reserve IRQ12 for the PS/2 mouse or allow other devices to make use of this IRQ.
STX88831 STX Evaluation Platform Module Series User’s Manual LAN Boot Option Use these items to enable or disable the Boot ROM function of the onboard LAN chip when the system boots up.
STX88831 STX Evaluation Platform Module Series User’s Manual 4.7 Security Menu The Security menu allows users to change the security settings for the system. 50 Supervisor Password This item indicates whether a supervisor password has been set. If the password has been installed, Installed displays. If not, Not Installed displays. User Password This item indicates whether a user password has been set. If the password has been installed, Installed displays. If not, Not Installed displays.
STX88831 STX Evaluation Platform Module Series User’s Manual 4.8 Chipset Menu The Chipset menu allows users to change the advanced chipset settings. You can select any of the items in the left frame of the screen to go to the sub menus: North Bridge Configuration South Bridge Configuration For items marked with “”, please press for more options.
STX88831 STX Evaluation Platform Module Series User’s Manual North Bridge Configuration 52 DRAM Frequency This item allows you to control the Memory Clock. Configure DRAM Timing by SPD This item can enable or disable DRAM timing by SPD (Serial Presence Detect) device, which is a small EEPROM chip on the memory module, containing important information about the module speed, size, addressing mode and various parameters.
STX88831 STX Evaluation Platform Module Series User’s Manual Internal Graphics Mode Select This item allows you to select the amount of system memory used by the internal graphics device. Video Function Configuration Press for the sub-menu for setting up video function.
STX88831 STX Evaluation Platform Module Series User’s Manual South Bridge Configuration 54 AC97 Controller This item allows you to enable or disable the AC97 audio support. Restore on AC Power Loss This item can control how the PC will behave once power is restored following a power outage, or other unexpected shutdown. PCIE Port 0 / PCIE Port 0 IOxAPIC This item allows you to set or disable the PCI Express Ports.
STX88831 STX Evaluation Platform Module Series User’s Manual 4.9 Exit Menu The Exit menu allows users to load your system configuration with optimal or failsafe default values. Save Changes and Exit When you have completed the system configuration changes, select this option to leave Setup and reboot the computer so the new system configuration parameters can take effect. Select Save Changes and Exit from the Exit menu and press . Select Ok to save changes and exit.
STX88831 STX Evaluation Platform Module Series User’s Manual but may not work best for all computer applications. In particular, do not use the Optimal Setup options if your computer is experiencing system configuration problems. Select Load Optimal Defaults from the Exit menu and press . 56 Load Fail-Safe Defaults It automatically sets all Setup options to a complete set of default settings when you select this option.
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STX88831 STX Evaluation Platform Module Series User’s Manual APPENDIX A WATCHDOG TIMER Watchdog Timer Setting After the system stops working for a while, it can be auto-reset by the Watchdog Timer. The integrated Watchdog Timer can be set up in the system reset mode by program.
STX88831 STX Evaluation Platform Module Series User’s Manual ; IF to disable WDT: O 2E 30 O 2F 00 ; Can be disable at any time Timeout Value Range 1 to 255 Minute / Second Program Sample Watchdog Timer can be set to system reset after 5-second timeout.
STX88831 STX Evaluation Platform Module Series User’s Manual APPENDIX B DIGITAL I/O Digital I/O Software Programming (For STB86600 DIO Port) Didital I/O Connector : DIO1 Pin Signal Pin 1 Digital Output 0 (Bit 0) 2 Digital Input 0 (Bit 0) 3 Digital Output 1 (Bit 1) 4 Digital Input 1 (Bit 1) 5 Digital Output 2 (Bit 2) 6 Digital Input 2 (Bit 2) 7 Digital Output 3 (Bit 3) 8 Digital Input 3 (Bit 3) 9 Digital Output 4 (Bit 4) 10 Digital Input 4 (Bit 4) 11 Digital Output 5 (Bit 5) 12
STX88831 STX Evaluation Platform Module Series User’s Manual The Digital I/O on the board is not an isolated type : Output Address Bit Input Address Bit Out 0 123h 0 In 0 123h 0 Out 1 123h 1 In 1 123h 1 Out 2 123h 2 In 2 123h 2 Out3 123h 3 In 3 123h 3 Out 4 123h 4 In 4 123h 4 Out 5 123h 5 In 5 123h 5 Out 6 123h 6 In 6 123h 6 Out 7 123h 7 In 7 123h 7 DIO output program sample : O 123 03 Out 0, Out 1 is High, Out 2~7 is Low (1 High , 0 Low) O 123
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