ReadyBoard™ 910 Single Board Computer Reference Manual P/N 50-1Z115-1020
Notice Page DISCLAIMER ADLINK Technology, Incorporated makes no representations or warranties with respect to the contents of this manual or of the associated ADLINK products, and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose. ADLINK shall under no circumstances be liable for incidental or consequential damages or related expenses resulting from the use of this product, even if it has been notified of the possibility of such damages.
Contents Chapter 1 About This Manual ....................................................................................................1 Purpose of this Manual ....................................................................................................................1 References ......................................................................................................................................1 Chapter 2 Product Overview...........................................................
Contents Power Interfaces ........................................................................................................................... 36 Power In ................................................................................................................................... 36 Power On ................................................................................................................................. 36 Power-On Button ........................................................
Contents Table 2-4. Table 2-5. Table 2-6. Table 2-7. Table 3-1. Table 3-2. Table 3-3. Table 3-4. Table 3-5. Table 3-6. Table 3-7. Table 3-8. Table 3-9. Table 3-10. Table 3-11. Table 3-12. Table 3-13. Table 3-14. Table 3-15. Table 3-16. Table 3-17. Table 3-18. Table 3-19. Table 3-20. Table 3-21. Table 3-22. Table 4-1. Table A-1. ReadyBoard 910 Power Supply Requirements .................................................................................16 Environmental Requirements............................
Contents vi Reference Manual ReadyBoard 910
Chapter 1 About This Manual Purpose of this Manual This manual is for designers of systems based on the ReadyBoard 910 Single Board Computer (SBC). The information in this manual helps designers create embedded systems based on specific design requirements.
Chapter 1 • About This Manual SMBus Specification Version 2.0 Specification: http://smbus.org/specs/ • AMI BIOS Aptio TSE User’s Guide Datasheet: http://www.ami.com/support/doc/AMI_TSE_User_Manual_PUB.pdf Chip specifications: • Intel Corporation and the Mobile 2nd and 3rd Generation Core™i or Celeron© B810 CPUs Web site: http://ark.intel.com/ • Intel Corporation and the BD82HM65, 6 Series Express chipset, featured as the Platform Controller Hub (PCH) Datasheet: http://www.intel.
Chapter 2 Product Overview This overview presents general information about the EPIC form factor and the ReadyBoard 910 Single Board Computer (SBC). After reading this chapter you should understand: • EPIC architecture • Product Description • ReadyBoard 910 features • Major components • Connectors • Specifications EPIC Architecture In 2004, five companies collaborated to fill the void between the EBX size and the PC/104 size with a new industry standard form factor (115mm x 165mm, or 4.
Chapter 2 Product Overview Product Description The ReadyBoard 910 is a mid-sized, EPIC-compatible, high quality single-board system, which contains all the component subsystems of a PC/AT PCI motherboard plus the equivalent of up to 4 PCI expansion boards.
Chapter 2 Product Overview Board Features • • • • • • CPU Supports Intel 35W Celeron and 35W and 45W 2nd and 3rd Generation Core i processors Provides DMI (Direct Media Interface) with 2GB/s of maximum theoretical bandwidth in each direction Provides FDI (Flexible Display Interface) for carrying display traffic to the PCH Supports internal 256KB L2 cache for each execution core Supports up to 8MB L3 cache shared among all cores Supports Enhanced Intel SpeedStep® Technology (EI
Chapter 2 • • • • • 6 Product Overview Support RS232 capability on both ports Support full modem capability on both ports Support RS485 or RS422 operation on both ports Support programmable word length, stop bits, and parity Support 16-bit programmable baud-rate generator and an interrupt generator Keyboard/Mouse Interface Provides PS/2 keyboard interface (shared with mouse) Provides PS/2 mouse interface (shared with keyboard) Provides shared over-current fuse Prov
Chapter 2 Product Overview Provides SMBus data and clock headers Provides headers for optional CPU and System fans (+12 volt power supply required) Supports a customizable Logo (Splash) Screen (contact Sales Representative) Supports Serial Console Provides Watchdog Timer SSD (Solid State Drive) Provides EXT header for optional CAN and Telecom modules ReadyBoard 910 Reference Manual 7
Chapter 2 Product Overview Block Diagram Figure 2-3 illustrates the functional components of the ReadyBoard 910. CPU Intel Core i7-3610QE (Quad-Core) 2.3GHz Core i5-3610ME (Dual-Core) 2.7GHz Core i3-3120ME (Dual-Core) 2.2GHz Core i7-2710QE (Quad-Core) 2.1GHz Core i5-2510E (Dual-Core) 2.5GHz Core i3-2330E (Dual-Core) 2.2GHz Celeron B810 (Dual-Core) 1.6GHz (with integrated Processor Core and Graphics Memory Hub) USB 3.0 Host USB 2.
Chapter 2 Product Overview Major Components (ICs) Table 2-1 lists the major Integrated Circuits (ICs) on the ReadyBoard 910, including a brief description of each IC. Figure 2-4 shows the locations of the major ICs. Table 2-1. Major Component Descriptions and Functions Chip Type Mfg.
Chapter 2 Product Overview Table 2-1.
Chapter 2 Key: U5 - PCIe-to-PCI Bridge U15 - PCH U18 - TMDS Level Shifter U22 - RS-485/422 Transceiver - COM0-1 U24 - Super I/O U25 - SSD U26 - Audio Codec U30 - CPU U33 - Gb Ethernet Controller - GLAN1 U34 - Gb Ethernet Controller - GLAN2 U38 - Ethernet EEPROM - GLAN1 U46 - RS-232 Transceiver - COM0-1 Product Overview U46 U30 U24 U33 U38 U25 U18 U5 U26 U22 RB910_Top_Comp_b U15 U34 Figure 2-4.
Chapter 2 Product Overview Header, Connector, and Socket Definitions Table 2-2 describes the headers, connectors, and sockets shown in Figure 2-6. Table 2-2. Header, Connector, and Socket Descriptions 12 Header # Board Access Description CN1 – Power On Top 3-pin, 0.049" (1.25mm) shrouded header for Power On and +5V standby voltages CNX1 – Digital Audio S/PDIF I/O Top 3-pin, 0.049" (1.25mm) shrouded header for incoming and outgoing digital audio signals CN2 – PCI-104 Top 120-pin, 0.
Chapter 2 Product Overview Table 2-2. Header, Connector, and Socket Descriptions (Continued) CN23 – DDR3 SODIMM1 (on bottom side) Bottom 204-pin, standard socket for non-ECC, unbuffered DDR3 SODIMM FN1 – CPU Fan Top FN2 – System Fan Top JP5 – Beeper/Buzzer Top 3-pin, 0.100" (2.54 mm) header, providing +12V, tach, and ground signals to CPU fan 3-pin, 0.100" (2.54mm) header, providing +12V, tach, and ground signals to System fan 2-pin, 0.
Chapter 2 Product Overview Key: CN1 - Power On CNX1 - Digital Audio SPDF I/O CN2 - PCI-104 CN3 - Power CN4 - DVI CN5 - LVDS CN6 - SATA1 CN7 - LPC CN8 - Serial 2 - COM1 CN9 - EXT CN10 - Audio CN11 - SATA2 CN12 - Battery CN13 - GPIO CN14 - USB 1-2 CN15 - USB Standard CN16 - PS/2 Standard CN17 - Serial 1 - COM0 (Standard DB9) CN18 - VGA CN19 - GLAN1 Standard RJ45 CN20 - GLAN2 Standard RJ45 CN21 - PCIe Mini Card (on bottom side) CN22 - SODIMM2 (on bottom side) CN22 - SODIMM1 (on bottom side) FN1 - Fan (CPU) F
Chapter 2 Product Overview Jumper Header Definitions Table 2-3 describes the jumper headers shown in Figure 2-6 on page 14. All jumper headers provide 0.079" (2mm) pitch. Table 2-3. Jumper Settings Jumper Header Installed Removed/Moved JP1 – LVDS Panel-Voltage Selection Enable +3.
Chapter 2 Product Overview Specifications Power Specifications Table 2-4 lists the power requirements for the ReadyBoard 910. Table 2-4. Power Supply Requirements Parameter 2.3GHz Intel Core i73610QE Characte ristics 2.7GHz Intel Core i53610ME Characte ristics 2.4GHz Intel Core i33120ME Characte ristics 2.1GHz Intel Core i72710QE Character istics 2.5GHz Intel Core i5-2510E Character istics 2.2GHz Intel Core i3-2330E Character istics 1.
Chapter 2 Product Overview Environmental Specifications Table 2-5 provides the most efficient operating and storage temperature ranges required for this board. Table 2-5.
Chapter 2 Product Overview Mechanical Specifications Figures 2-9 and 2-10 provide the I/O panel and mounting hole dimensions of the ReadyBoard 910. DB9 Gigabit Ethernet 2 Power/SATA Activity LED USB 1 & 2 Keyboard/ (USB 1 Lower) Mouse Reset Switch VGA RB910sideview_a Gigabit Ethernet 1 165.1 2.54 15.849 1.727 15.290 1.391 4.572 9.398 14.071 6.985 1.828 13.893 12.954 6.985 16.510 16.256 9.906 2.032 30.835 1.701 15.849 11.56 5.
Chapter 2 Product Overview (109.93mm) 4.33 (104.85mm) 4.13 (66.25mm) 2.60 (15.25mm) 0.60 0.00 (5.08mm) 0.20 0.20 (5.08mm) 0.00 0.00 0.02 (0.55mm) 2.03 (51.55mm) 2.50 (63.40mm) RB910_Mech_Dimen_b 2.52 (64.03mm) 4.76 (120.82mm) 5.52 (140.24mm) 5.55 (140.87mm) 5.70 (145.02mm) 6.10 (154.84mm) 6.30 (159.92mm) Figure 2-10.
Chapter 2 20 Product Overview Reference Manual ReadyBoard 910
Chapter 3 Hardware Overview This chapter discusses custom features of the ReadyBoard 910 in the following order: • Interrupt Channel Assignments • Memory Map • I/O Address Map • Serial Interfaces • USB Interfaces • • • • • USB 3.0 Support (2 ports) USB 2.
Chapter 3 • Hardware Fan Interfaces Power and Sleep States Sleep States (ACPI) Wake-Up Activities NOTE ADLINK Technology, Inc. supports only the features/options tested and listed in this manual. The main integrated circuits (chips) used in the ReadyBoard 910 may provide more features or options than are listed for the ReadyBoard 910, but some of these chip features/options are not supported on the board and may not function as specified in the chip documentation.
Chapter 3 Hardware Interrupt Channel Assignments The interrupt channel assignments are shown in Table 3-1. Table 3-1. Interrupt Channel Assignments Device vs IRQ No.
Chapter 3 Hardware Memory Map The following table provides the common PC/AT memory allocations. These are DOS-level addresses. The OS typically hides these physical addresses by way of memory management. Memory below 000500h is used by the BIOS. Table 3-2.
Chapter 3 Table 3-3.
Chapter 3 Hardware 1 2 3 4 5 9 7531 Serial Port 2 (CN8, COM1) Or 10 8 6 4 2 Standard DB9 Serial Port 1 (CN17, COM0) Connector (Male) Front View 6 7 8 9 RB910RS485jump_a The RS-422 mode uses a four-wire interface and does not need any pins tied together, but you must select RS-485 mode in BIOS Setup. Figure 3-1. RS-485 Serial Port Implementation Table 3-4 provides the signals for the corresponding pins of the serial 2 interface (CN8).
Chapter 3 Hardware USB Interfaces The ReadyBoard 910 offers state-of-the-art USB 3.0 support through the PCH using PCIe x1 Port 1 and a USB 3.0 xHCI host controller module. Features of the USB 3.0 interface include up to two downstream ports (each independently enabled or disabled), SuperSpeed, High-Speed, and Full-Speed signals, and support for input frequencies between 20MHz and 50MHz. An 18-pin, standard dual-port connector (CN15) delivers the signals for two USB 3.
Chapter 3 Hardware Table 3-6 lists the pin signals for the Digital Audio header, which provides 10 pins, two rows, odd/even pin sequence with 0.079" (2mm) pitch. Table 3-6.
Chapter 3 • Hardware Provide plug and play capabilities (EDID and DDC2B) NOTE The ReadyBoard 910 DVI support is only for DVI-D signals. The cable kit for this product only provides a DVI-I cable, but the cable is compatible with DVI-D signals.
Chapter 3 Hardware Table 3-8. DVI Pin Signal Descriptions (CN4) (Continued) 21 NC Not Connected 22 NC Not Connected Note: The shaded table cells denote power or ground. LVDS Interface Table 3-9 lists the pin signals for the LVDS header, which provides 42 pins, two rows, odd/even (1,2) pin sequence with 0.049" (1.25mm) pitch. Table 3-9. LVDS Interface Pin Signals (CN5) 30 Pin # Signal Description 1 +12V +12 volt input 2 +VCC (+3.
Chapter 3 Hardware Table 3-9.
Chapter 3 Hardware Table 3-10. EXT Interface Pin Signal Descriptions (CN9) (Continued) Pin # Signal Description 13 S2_TXD Serial Transmit Data 14 WL_RST-L Power Reset Low 15 S2_RTS-L Serial Request To Send Low 16 PCH_GPIO36 GPIO 3.3V Standby 17 S3_RXD Serial Receive Data 18 PCH_GPIO37 GPIO 3.3V Standby 19 S3_TXD Serial Transmit Data 20 PCH_GPIO38 GPIO 3.3V Standby 21 SIO_SERIRQ Super IO Serial IRQ for Interrupt Support 22 PCH_GPIO39 GPIO 3.
Chapter 3 Hardware External Beeper/Buzzer Interface The Beeper/Buzzer signals from the PCH are fed to Beeper/Buzzer header through an OR circuit in conjunction with +5V to drive an external PC speaker. The signal is also fed to the on-board Audio CODEC to provide a PC Beep/Buzz signal for the Line Out connections. Table 3-12. External Beeper/Buzzer Interface Pin Signal Descriptions (JP5) Pin # Signal Description 1 BUZZ_BEEP Speaker Output – This signal drives an external PC Beeper/Buzzer speaker.
Chapter 3 Hardware Oops! Jumper (BIOS Recovery) The Oops! jumper is provided in the event the BIOS settings you have selected prevent you from booting the system. By using the Oops! jumper you can prevent the current BIOS settings in Flash from being loaded, forcing the BIOS to use the default settings. Connect the DTR pin to the RI pin on Serial port 1 (COM0) prior to boot up to prevent the present BIOS settings from loading.
Chapter 3 Hardware System Management Bus (SMBus) The PCH contains both a host and slave SMBus ports; but the host cannot access the slave internally. The slave port allows an external master access to the PCH through headers JP7 and JP8. The master is used to communicate with the SODIMMs. Table 3-14 lists the slave device names and corresponding reserved binary addresses on the SMBus. Table 3-15 lists the pin signals for the SMBus DATA header, which provides 2 pins, 1 row, and 0.079" (2mm) pitch.
Chapter 3 Hardware Power Interfaces The ReadyBoard 910 uses various voltages onboard and externally receives +12 volts through the external Power In (CN3) interface, which uses an 8-pin header with 0.165" (4.2 mm) pitch. The +12V is provided for the CPU Fan, System Fan, LVDS power, PCI-104 bus, and PCIe Mini Card power. All other onboard voltage requirements, including the CPU core voltages are met with +5 volts DC +/- 5%, derived from the externally supplied +12 volts.
Chapter 3 Hardware Power-On Button The Power-On button turns the ReadyBoard 910 and its attached power supply to a fully on condition, if you are using an ATX power supply. Normally—if the operating system (OS) supports sleep states—the OS will turn off the ReadyBoard 910 and its power supply during the OS shut down process.
Chapter 3 Hardware Power and Sleep States The following information applies to the ReadyBoard 910 only if an ATX power supply is used to provide power. If a non-ATX power supply is used, the ReadyBoard 910 is controlled only by the Power On/Off switch on the power supply and the various sleep states are not available. Sleep States (ACPI) The ReadyBoard 910 supports the ACPI (Advanced Configuration and Power Interface) standard, which is a key component of certain Operating Systems’ power management.
Chapter 3 • Hardware 4th state is a hibernate or suspend-to-disk state (S4). In this state, no internal operations take place, except for the internal RTC. This includes no activity for the CPU, CD-ROM, or hard disk drives. The ReadyBoard 910 appears to be off, including the external Power-On LED if connected. Your system will take longer to wake-up in this sleep state, however, since your data is saved to the disk, it is more secure and should not be lost in the event of a power failure.
Chapter 3 40 Hardware Reference Manual ReadyBoard 910
Chapter 4 BIOS Setup Introduction This section assumes the user is familiar with general BIOS Setup and does not attempt to describe the BIOS functions. Refer to “BIOS Setup Menus ” on page 43 in this chapter for a map of the BIOS Setup settings. If ADLINK has added to or modified any of the standard BIOS functions, these functions will be described. Entering BIOS Setup (Local Video Display) To access BIOS Setup using a local video display for the ReadyBoard 910: 1.
Chapter 4 9. BIOS Setup Use the key to select the screen menus listed in the Opening BIOS screen. NOTE The serial console port is not hardware protected. Diagnostic software that probes hardware addresses may cause a loss or failure of the serial console functions. OEM Logo Screen (Splash) The ReadyBoard 910 BIOS supports a graphical logo screen, which can be customized by the user and an ADLINK Sales Representative and displayed when enabled through the BIOS Setup Utility.
Chapter 4 BIOS Setup BIOS Setup Menus This section provides illustrations of the six main setup screens in the ReadyBoard 910 BIOS Setup Utility. Below each illustration is a bullet list of the screen’s submenus and setting selections. The setting selections are presented in brackets after each submenu or menu item, and the optimal default settings are presented in bold. For more detailed definitions of the BIOS settings, refer to the AMI Aptio TSE User Manual: http://www.ami.
Chapter 4 • BIOS Setup System Date & Time System Date (day of week, mm:dd:yyyy) – This field requires the alpha-numeric entry of the day of week, day of the month, calendar month, and all 4 digits of the year, indicating the century plus year (Fri XX/XX/20XX). System Time (hh:mm:ss) – This is a 24-hour clock setting in hours, minutes, and seconds. BIOS Advanced Setup Screen Aptio Setup Utility - Copyright (C) 20XX American Megatrend, Inc.
Chapter 4 • • BIOS Setup Max CPU Speed XXXX MHz Min CPU Speed XXX MHz Processor Speed XXXX MHz CPU Speed XXXX MHz Processor Cores X Intel HT Technology Supported EMT64 Supported Hyper-Threading [Disabled; Enabled] Active Processor Cores [All; 1; 2; 3] SATA Configuration SATA Controller(s) SATA Mode Selection Serial ATA Port 0 [Empty] Serial ATA Port 1 [Empty] Serial ATA Port 2 [SSD model] [IDE; AHCI] USB Configuration USB Devices: •
Chapter 4 • • H/W Monitor CPU Temperature : +XX Degree C System Temperature : +XX Degree C CPU Fan Speed : XXXX RPM SYS Fan Speed: : XXXX RPM Vcore : +X.XXX V Vccp : +X.XX V Vcc : +X.XX V +5.0V : +X.XX V +12V : +XX.XX V VTR : +X.XX V Vbat : +X.
Chapter 4 BIOS Setup COM1 • Console Redirection [Disabled; Enabled] • Console Redirection Settings (When Console Redirection for this Port is Enabled) - Terminal Type [VT100; VT100+; VT-UTF8; ANSI] - Bits per second [9600; 19200; 38400; 57600; 115200] - Data Bits [7; 8] - Parity [None; Even; Odd; Mark; Space] - Stop Bits [1; 2] - Flow Control [None; Hardware RTS/CTS] - VT-UTF8 Combo Key Support [Disabled; Enabled] - Recorder Mode [Disabled; Enabled] - Resolution 100x31 [Disabled; Enabled] - Legacy O
Chapter 4 BIOS Setup BIOS Chipset Setup Screen Aptio Setup Utility - Copyright (C) 20XX American Megatrend, Inc. Advanced Chipset Boot Security Save & Exit Main [Setting Description] PCH-IO Configuration System Agent (SA) Configuration Enter : Select +/- : Change Opt. F1 : General Help F2 : Previous Values F3 : Optimized Defaults F4 : Save & Exit ESC: Exit RB910_BIOS_Chipset_b : Select Screen : Select Item Version X.XX.XXXX. Copyright (C) 20XX American Megatrends, Inc. Figure 4-3.
Chapter 4 • BIOS Setup System Agent (SA) Configuration X.X.X.
Chapter 4 BIOS Setup BIOS Boot Setup Screen Aptio Setup Utility - Copyright (C) 20XX American Megatrend, Inc. Advanced Chipset Boot Security Save & Exit Main [Setting Description] Boot Configuration Setup Prompt Timeout Bootup NumLock State 1 [On] Quiet Boot [Disabled] Set Boot Priorities [CD/DVD] [Hard Disk : Xxxxxxxx] [USB Floppy] [USB CD/DVD] [USB Hard Disk] [USB Key] [Network] [UEFI] : Select Screen : Select Item Enter : Select +/- : Change Opt.
Chapter 4 BIOS Setup 7th Boot [CD/DVD; Hard Disk : Xxxxxxx; USB Floppy; USB CD/DVD; USB Hard Disk; USB Key; Network; UEFI; Disabled] 8th Boot [CD/DVD; Hard Disk : Xxxxxxx; USB Floppy; USB CD/DVD; USB Hard Disk; USB Key; Network; UEFI; Disabled] Hard Disk BBS Priorities • [SATA: Xxxxxxxx; Disabled] BIOS Security Setup Screen Main Aptio Setup Utility - Copyright (C) 20XX American Megatrend, Inc.
Chapter 4 BIOS Setup BIOS Save & Exit Setup Screen Aptio Setup Utility - Copyright (C) 20XX American Megatrend, Inc.
Chapter 4 BIOS Setup Save as User Defaults • Restore User Defaults • • Save configuration? [Yes; No] Restore User Defaults? [Yes; No] Boot Override SATA: XXXXXXXXXXX Launch EFI Shell from file system device ReadyBoard 910 Reference Manual 53
Chapter 4 54 BIOS Setup Reference Manual ReadyBoard 910
Appendix A Technical Support ADLINK Technology, Inc. provides a number of methods for contacting Technical Support listed below in Table A-1. Requests for support through the Ask an Expert are given the highest priority, and usually will be addressed within one working day. • ADLINK’s Ask an Expert – This is a comprehensive support center designed to meet all your technical needs. This service is free and available 24 hours a day through the Ampro By ADLINK web page at http://www.adlinktech.com/AAE/.
Appendix A Technical Support Table A-1. Technical Support Contact Information (Continued) ADLINK Technology Beijing Address: ࣫ҀᏖ⍋⎔ऎϞഄϰ䏃 1 োⲜ߯ࡼॺ E ᑻ 801 ᅸ(100085) Rm. 801, Power Creative E, No. 1 Shang Di East Rd. Beijing, 100085 China Tel: +86-10-5885-8666 Fax: +86-10-5885-8626 Email: market@adlinktech.com ADLINK Technology Shenzhen Address: ⏅ഇᏖफቅऎ⾥ᡔುफऎ催ᮄफϗ䘧 ᭄ᄫᡔᴃು A1 ᷟ 2 ὐ C ऎ (518057) 2F, C Block, Bldg. A1, Cyber-Tech Zone, Gao Xin Ave. Sec. 7 High-Tech Industrial Park S.
Appendix A Technical Support Table A-1. Technical Support Contact Information (Continued) ADLINK Technology, Inc. (Israeli Liaison Office) Address: 27 Maskit St., Corex Building PO Box 12777 Herzliya 4673300, Israel Tel: +972-54-632-5251 Fax: +972-77-208-0230 Email: israel@adlinktech.com ADLINK Technology, Inc. (UK Liaison Office) Tel: +44 774 010 59 65 Email: UK@adlinktech.
Appendix A 58 Technical Support Reference Manual ReadyBoard 910
Index A E ACPI features ...................................................... 38 Advanced BIOS screen ....................................... 44 AMI BIOS User’s Guide ...................................... 2 Architecture EPIC (Embedded Platform for Industrial Computing) ....................................................... 3 audio interface pin out list .................................. 28 Environmental specifications ..............................17 EPIC Architecture ................................
Index O Oops! jumper (BIOS recovery) ........................... 34 P PCH data sheet ...................................................... 2 PCI-104 features ............................................................ 5 specification .................................................... 1 pins pin-1 locations ............................................... 14 sequence definition ........................................ 13 power consumption ..................................................
Index T V Technical Support ............................................... 55 temperature monitor .......................................................... 33 parameters ..................................................... 17 terminal emulation software serial console ................................................. 34 thermal cooling requirements ..................................... 17 sensor ............................................................ 33 thickness .................................
Index 62 Reference Manual ReadyBoard 910