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Summary of Contents for VersaLogic VL-EPU-3312
- Page 1 Hardware Reference Manual DOC. REV. 1.2 Jan 2017 Raven (VL-EPU-3312) Intel Atom™ E38xx-based ® Embedded Processing Unit with SATA, Dual Ethernet, USB, Digital I/O, Serial, Video, Mini PCIe Sockets, SPX, Trusted Platform Module, and microSD. VL-EPU-3312 Reference Manual...
- Page 2 Copyright © 2016-2017 VersaLogic Corp. All rights reserved. Notice: Although every effort has been made to ensure this document is error-free, VersaLogic makes no representations or warranties with respect to this product and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose.
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Page 3: Customer Support
Customer Support If you are unable to solve a problem after reading this manual, visiting the product support page, or searching the KnowledgeBase, contact VersaLogic Technical Support at (503) 747-2261. VersaLogic support engineers are also available via e-mail at Support@VersaLogic.com. -
Page 4: Electrostatic Discharge
CMOS RAM to become corrupted through careless handling, resulting in CMOS resetting to factory defaults. Earth Ground Requirement CAUTION: All mounting standoffs should be connected to earth ground (chassis ground). This provides proper grounding for EMI purposes. VL-EPU-3312 Reference Manual... -
Page 5: Table Of Contents
Power Delivery Considerations ................22 Power Button ....................... 23 Supported Power States ..................23 Battery Power Options ..................24 External Speaker ....................... 25 Push-button Reset ......................25 CPU Fan Connector ......................26 Cabling ......................... 26 LEDs ..........................27 VL-EPU-3312 Reference Manual... - Page 6 User I/O Connector ....................56 Cabling ......................... 57 On-board Battery ....................57 Auxiliary I/O Connector ..................58 Dimensions and Mounting Holes ................ 59 VL-CBR-2004B Paddleboard ..................60 Analog Input Connections ....................60 Main I/O Connector ......................61 Cabling ......................... 61 VL-EPU-3312 Reference Manual...
- Page 7 KNOWN ISSUES ......................77 Figures Figure 1. The Raven (VL-EPU-3312) ......................9 Figure 2. Raven (VL-EPU-3312) Block Diagram ..................11 Figure 3. Raven Dimensions and Mounting Holes ..................12 Figure 4. Mounting Plate Dimensions ......................13 igure 5. Typical Development Configuration ....................15 Figure 6.
- Page 8 Table 21: CPU Thermal Trip Points ......................64 Table 22: Temperature Monitoring Programs ....................65 Table 23: Absolute Minimum and Maximum Air Temperatures ..............66 Table 24: EPU-3312 Thermal Testing Setup ....................67 Table 25: Heat Pipe Additional Configuration Details .................. 71 VL-EPU-3312 Reference Manual viii...
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Page 9: Introduction
Introduction Introduction Figure 1. The Raven (VL-EPU-3312) VL-EPU-3312 Reference Manual... -
Page 10: Features
Introduction Features The Raven (VL-EPU-3312) is a feature-packed Embedded Processing Unit (EPU) engineered and tested to meet the embedded industry’s evolving requirements to develop smaller, lighter, and lower power embedded systems while adhering to stringent regulatory standards. This embedded computer, equipped with an Intel... -
Page 11: Block Diagram
Introduction Block Diagram Figure 2. Raven (VL-EPU-3312) Block Diagram VL-EPU-3312 Reference Manual... -
Page 12: Dimensions And Mounting
Introduction Dimensions and Mounting Raven Dimensions Figure 3 provides the board’s dimensions. Figure 3. Raven Dimensions and Mounting Holes (Not to scale. All dimensions in millimeters.) VL-EPU-3312 Reference Manual... -
Page 13: Mounting Plate Dimensions
Introduction Mounting Plate Dimensions Figure 4. Mounting Plate Dimensions (Not to scale. All dimensions in millimeters.) VL-EPU-3312 Reference Manual... -
Page 14: Configuration And Setup
VGA monitor and a VL-CBR-2032 Mini DisplayPort-to-VGA adapter A thermal solution (using either VersaLogic accessories or a customer-designed solution) You will also need an operating system (OS) installation CD-ROM. Basic Setup The following steps outline the procedure for setting up a typical development system. The Raven should be handled at an ESD workstation or while wearing a grounded antistatic wrist strap. -
Page 15: Igure 5. Typical Development Configuration
Attach the motherboard connector of the ATX power supply to the adapter. Attach an ATX power cable to any 3.5-inch drive that is not already attached to the power supply (hard drive or CD-ROM drive). VL-EPU-3312 Reference Manual... -
Page 16: Bios Setup Utility
Install the operating system according to the instructions provided by the operating system manufacturer. BIOS Setup Utility Refer to the VersaLogic System Utility Reference Manual for information on how to configure the Raven BIOS. The Raven permits you to store user-defined BIOS settings. This enables you to retrieve those settings from cleared or corrupted CMOS RAM, or battery failure. -
Page 17: Jumper Blocks
Jumper Out: Not terminated (RS-232) (default) Jumper In: Use Backup BIOS Primary/Backup BIOS Select Jumper Out: Use Primary BIOS (default) Jumper In: Backup BIOS is write-protected Backup BIOS Write Protect Jumper Out: Backup BIOS is not write-protected (default) VL-EPU-3312 Reference Manual... -
Page 18: Board Features
The Intel Atom E38xx SoC features integrated 3D graphics, video encode and decode, and memory and display controllers in one package. The following CPU configurations are available: VL-EPU-3312-EAP: Intel Atom 3815 – 1.46 GHz, Single Core VL-EPU-3312-EBP: Intel Atom 3827 – 1.75 GHz, Dual Core ... -
Page 19: I/O Interfaces
Battery Power Options on page 24 for more information. The BIOS Setup utility sets the RTC. Watchdog Timer The Raven has a watchdog timer that contains a selectable pre-scaler approximately 1 as to 10 minutes. The BIOS Setup utility configures the watchdog timer. VL-EPU-3312 Reference Manual... -
Page 20: External Connectors
SATA – page 29 Ethernet – page 52 SPX – page 41 LVDS Backlight – page 51 USB 3.0 – page 31 LVDS Display – page 49 User I/O – page 56 VL-EPU-3312 Reference Manual... -
Page 21: Power Delivery
An 8-pin power connector applies the Main input power to the Raven. Figure 8 shows the location and the pin orientation of the main power connector. Table 4 lists the pinout of the main power connector. Figure 8. Main Power Connector Pin Orientation VL-EPU-3312 Reference Manual... -
Page 22: Cabling
For example, driving long RS-232 lines at high speed can increase power demand. The VersaLogic VL-PS-ATX12-300A is a 1U size ATX power supply suitable for use with the Raven. Use the VL-CBR-0809 adapter cable to attach the power supply to the main power connector. -
Page 23: Power Button
S0. A full reboot is S5 (G2) required. No previous content is retained. Other components may remain powered so the computer can "wake" on input from the keyboard, clock, modem, LAN, or USB device. Mechanical off (ATX supply switch turned off). VL-EPU-3312 Reference Manual... -
Page 24: Battery Power Options
Figure 9 shows the location and pin orientation of the battery connector. Figure 9. Location and Pin Orientation of the Battery Connector Cabling If your application requires a custom cable, the following information will be useful: VL-EPU-3312 Board Connector Mating Connector Molex 501331-0207 Molex 501330-0200 VL-CBR-0203 External Battery Module The VL-CBR-0203 external battery module is compatible with the Raven. -
Page 25: External Speaker
1 mA. There must be no pull-up resistor on this signal. This connector uses IEC 61000-4-2-rated TVS components to help protect against ESD damage. A reset button on the VL-CBR-4005B paddleboard is provided. Refer to the chapter titled VL- CBR-4005B Paddleboard, beginning on page 55 for more information. VL-EPU-3312 Reference Manual... -
Page 26: Cpu Fan Connector
Signal Ground +12 VDC (Note) FAN_TACH FAN_CONTROL Note: The maximum current is 0.175 A Cabling If your application requires a custom cable, the following information will be useful: EPU-3312 Board Connector Mating Connector Molex 502386-0470 Molex 502380-0400 VL-EPU-3312 Reference Manual... -
Page 27: Leds
Wireless WAN/LAN activity for module installed in Mini PCIe Socket #2 Table 8, page 35 (Dual-LED) Status of power and wireless PAN activity for module installed in Mini Table 8, page 35 PCIe Socket #2 (Dual-LED) Figure 12. Location of Status Indicator LEDs VL-EPU-3312 Reference Manual... -
Page 28: Power-Good/Fault Indicator Leds
Green – indicates power good when the Raven in an S0 state. When in sleep modes, the LED pulses every 2 seconds. Yellow – indicates a fault. If this LED remains lit after power-cycling the Raven, contact VersaLogic Customer Support. Figure 13. Location of the Power-good/Fault Indicator LED VL-EPU-3312 Reference Manual... -
Page 29: Mass Storage Interfaces
Most current ATX power supplies provide SATA connectors, and many SATA drives provide both types of power connectors. If the power supply you are using does not provide SATA connectors, adapters are available. Figure 14. Location of the SATA Connector VL-EPU-3312 Reference Manual... -
Page 30: Microsd Socket
32 GB of storage capacity. Figure 15. Location of the microSD Socket eMMC Flash The Raven provides on-board eMMC Flash storage on certain models of the product. Specifically: VL-EPU-3312-EAP: none VL-EPU-3312-EBP: 4 GB VL-EPU-3312-EDP: 8 GB VL-EPU-3312 Reference Manual... -
Page 31: Multi-Purpose I/O
USB cable is removed by pulling up and away from the board. To reduce the risk of damaging the connector (and the board), pull the cable straight out of the connector; also, do not rock or wiggle the cable back and forth to loosen it from the connector. VL-EPU-3312 Reference Manual... -
Page 32: Mini Pcie Sockets
The sockets are compatible with plug-in Wi-Fi modems, GPS receivers, MIL-STD- 1553, flash data storage, and other cards for added flexibility. For information on Mini PCIe modules available from VersaLogic, contact Sales@VersaLogic.com. The VL-MPEs-F1E series of mSATA modules provide flash storage of 4 GB, 16 GB, or 32 GB. -
Page 33: Table 7: Mini Pcie / Msata Socket Pinout
Host transmitter diff. pair PCIe transmit – PETn0 – SMB_DATA SMBus data Two Wire I/F Two wire I/F data Host transmitter diff. pair PETp0 PCIe transmit + Ground Ground Ground Ground USB data – USB_D- Reserved Not connected VL-EPU-3312 Reference Manual... -
Page 34: W_Disable# Signal
Some Mini PCIe cards use this signal as a second Mini PCIe card wireless disable input. On the Raven, this signal is available for use for mSATA versus Mini PCIe card detection. There is an option on the VersaLogic Features BIOS Setup utility screen for setting the mSATA detection method. -
Page 35: Mini Pcie Card Wireless Status Leds
Wireless WAN inactive D12 and D14 Wireless LAN active Yellow Wireless LAN inactive Wireless PAN active Green Wireless PAN inactive D13 and D15 Minicard power is ON Yellow Minicard power is OFF Figure 18. Mini PCIe Wireless Status LEDs VL-EPU-3312 Reference Manual... -
Page 36: Msata Activity Led
Figure 19 shows the location of the SATA/mSATA activity blue LED. This LED indicates activity on either the SATA or the mSATA interface. Not all mSATA drives provide this disk activity signal. Figure 19. Location of the SATA/mSATA Activity LED VL-EPU-3312 Reference Manual... -
Page 37: User I/O Connector
This connector uses IEC 61000-4-2-rated TVS components to help protect against ESD damage. Figure 20 shows the location and pin orientation of the user I/O connector. Figure 20. Location and Pin Orientation of the User I/O Connector VL-EPU-3312 Reference Manual... -
Page 38: Cabling
Cabling An adapter cable, part number VL-CBR-4005A, is available for connecting the CBR-4005B paddleboard to the VL-EPU-3312. This is a 12-inch, Pico-Clasp 40-pin to 40-pin cable. If your application requires a custom cable, the following information will be useful: EPU-3312 Board Connector... -
Page 39: Analog-To-Digital Converter Interface
Analog-to-Digital Converter Interface The Analog-to-Digital converter interface provides eight single-ended analog input channels. Figure 21 shows the location and pin orientation of the Analog-to-Digital input connector. Figure 21. Location and Pin Orientation of the Analog-to-Digital Input Connector VL-EPU-3312 Reference Manual... -
Page 40: Cabling
SPI device 5 to enable the A/D read strobe for the SPI interface. Refer to the VL-EPU-3312 Programmer’s Reference Manual (available on the EPU-3312 Product Support Web Page) for information on configuring the SPX registers for A/D access. -
Page 41: Spx* Expansion Bus
1 of the SPX connector is protected by a 1 A resettable fuse. Figure 22 shows the location and pin orientation of the SPX connector. Figure 22. SPX Connector Location and Pin Configuration VL-EPU-3312 Reference Manual... -
Page 42: Cabling
An adapter cable, part number CBR-0901, is available. This is a 9-inch, 9-pin Pico-Clasp to Dual SPX cable. If your application requires a custom cable, the following information will be useful: EPM-31 Board Connector Mating Connector Molex 501568-0907 Molex 501330-0900 VL-EPU-3312 Reference Manual... -
Page 43: Serial I/O
IRQ lines are chosen in the BIOS Setup utility. The UARTs are 16550-based serial ports and are implemented in the FPGA. Figure 23 shows the location and pin orientation of the two serial I/O connectors. Figure 23. Location and Pin Orientation of the Serial I/O Connectors VL-EPU-3312 Reference Manual... -
Page 44: Serial Port Connector Pinout
COM4 CTS4 RXD4_P RXD4# RXD4_N — Cabling An adapter cable, part number CBR-1014, is available for routing the serial I/O signals to 9-pin D-sub connectors. This is a 12-inch, Pico-Clasp 10-pin to two 9-pin D-sub connector cable. VL-EPU-3312 Reference Manual... -
Page 45: Com Port Configuration
The default settings for the redirected console are as follows: 115,200 baud rate 8 data bits, No parity, 1 stop bit (that is, 8-None-1) No flow control VL-EPU-3312 Reference Manual... -
Page 46: Video Interfaces
(because it uses the DP port’s 3.3 V power) and it does not require software drivers. Figure 24 shows the location of the 20-pin Mini DisplayPort++connector. Table 14 lists the pinout of the Mini DisplayPort++ connector. VL-EPU-3312 Reference Manual... -
Page 47: Figure 24. Location Of The Mini Displayport++ Connector
Video Interfaces Figure 24. Location of the Mini DisplayPort++ Connector Table 14: Mini DisplayPort++ Connector Pinout Signal Signal HOT PLUG DETECT ML_LANE0_P CONFIG 1 ML_LANE0_N CONFIG 2 ML_LANE1_P ML_LANE3_P ML_LANE1_N ML_LANE3_N ML_LANE2_P AUX_CH_P ML_LANE2_N AUX_CH_N DP_POWER (3.3V) VL-EPU-3312 Reference Manual... -
Page 48: Vga Output
There is a 36 inch Mini DisplayPort to Mini DisplayPort cabling option available. (VL-CBR- 2031) There is also a Mini DisplayPort to HDMI 6 inch cable available (VL-CBR-2033). There is a Mini DisplayPort to VGA cable kit as well. (VL-CBR-2032) VL-EPU-3312 Reference Manual... -
Page 49: Lvds Interface
The BIOS Setup utility provides several options for standard LVDS flat panel types. If these options do not match the requirements of the panel you are using, contact Support@VersaLogic.com for a custom video BIOS. Figure 26. Location of the LVDS Connectors VL-EPU-3312 Reference Manual... -
Page 50: Table 15: Lvds Flat Panel Display Connector Pinout
VL-CBR-2017 – a 20-inch 24-bit 1.25 mm Hirose cable If your application requires a custom cable, the following information will be useful: EPU-3312 Board Connector Mating Connector Hirose DF19G-20S-1C (housing) Hirose DF19G-20P-1H(54) Hirose DF19-2830SCFA x19 (crimp socket) VL-EPU-3312 Reference Manual... -
Page 51: Lvds Backlight Connector
An adapter cable, part number CBR-0404, is available for powering the LVDS backlight from the Raven board. If your application requires a custom cable, the following information will be useful: EPU-3312 Board Connector Mating Connector Molex 501568-0407 Molex 501330-0400 VL-EPU-3312 Reference Manual... -
Page 52: Network Interfaces
The Ethernet connector provides access to the Ethernet ports 0 and 1. The connector uses IEC 61000-4-2-rated TVS components to help protect against ESD damage. Figure 27 shows the location and pin orientation of the Ethernet connector. Figure 27. Location and Pin Orientation of the Ethernet Connector VL-EPU-3312 Reference Manual... -
Page 53: Cabling
An adapter cable, part number CBR-1604, is available. This is a 12-inch, 16-pin Click-Mate to two RJ-45 connector cables. If your application requires a custom cable, the following information will be useful: EPU-3312 Board Connector Mating Connector Molex 503148-1690 Molex 503149-1600 VL-EPU-3312 Reference Manual... -
Page 54: Ethernet Status Leds
Figure 28 shows the location of the Ethernet status LEDs. LED D10 – indicates link activity on Ethernet port 0 LED D11 – indicates link activity on Ethernet port 1 Figure 28. Onboard Ethernet Status LEDs VL-EPU-3312 Reference Manual... -
Page 55: Vl-Cbr-4005B Paddleboard
VL-CBR-4005B Paddleboard VL-CBR-4005B Paddleboard VL-CBR-4005B Connectors and Indicators Figure 29 shows the locations of the connectors, switches, and LEDs on the VL-CBR-4005B paddleboard. Figure 29. VL-CBR-4005B Connectors, Switches, and LEDs VL-EPU-3312 Reference Manual... -
Page 56: User I/O Connector
USB1_N USB2_N USB3_P USB4_P USB3_N USB4_N +3.3 V (Note 1) SPKR# PLED# PWR_BTN# RST_BTN# I2C Clock V_BATT I2C Data V_BATT RETURN GPIO1 GPIO2 GPIO3 GPIO4 GPIO5 GPIO6 GPIO7 GPIO8 +3.3 V (Note 2) ETH0 LED ETH1 LED VL-EPU-3312 Reference Manual... -
Page 57: Cabling
Dispose of used batteries promptly. Nominal battery voltage is 3.0 V. If the voltage drops below 2.7 V, contact the factory for a replacement. The life expectancy under normal use is approximately five years. VL-EPU-3312 Reference Manual... -
Page 58: Auxiliary I/O Connector
Figure 31. Location and Pin Orientation of Auxiliary I/O Connector Table 19: Auxiliary I/O Connector Pinout Signal Signal I2C Clock V_BATT I2C Data V_BATT_RETURN GPIO1 GPIO2 GPIO3 GPIO4 GPIO5 GPIO6 GPIO7 GPIO8 +3.3 V Ethernet Port 0 LED Ethernet Port 1 LED VL-EPU-3312 Reference Manual... -
Page 59: Dimensions And Mounting Holes
VL-CBR-4005B Paddleboard Dimensions and Mounting Holes Figure 32. VL-CBR-4005B Dimensions and Mounting Holes VL-EPU-3312 Reference Manual... -
Page 60: Vl-Cbr-2004B Paddleboard
VL-CBR-2004B Paddleboard VL-CBR-2004B Paddleboard To access the eight analog-to-digital inputs on the Raven, a paddleboard and 12-inch cable are available from VersaLogic, part number VL-CBR-2005. Figure 33 shows the locations and pin orientations of the connectors on the CBR-2004B paddleboard. ... -
Page 61: Main I/O Connector
An adapter cable is bundled with the VL-CBR-2004B paddleboard. This is a 12-inch, Pico-Clasp 20-pin to 20-pin cable If your application requires a custom cable, the following information will be useful: CBR-4005B Board Connector Mating Connector Molex 501571-2007 Molex 501189-2010 VL-EPU-3312 Reference Manual... -
Page 62: Dimensions And Mounting Holes
VL-CBR-2004B Paddleboard Dimensions and Mounting Holes Figure 36. CBR-2004B Dimensions and Mounting Holes VL-EPU-3312 Reference Manual... -
Page 63: Thermal Considerations
90 ºC by controlling the mounting surface temperature. The EPU-3312 thermal solutions available from VersaLogic – the HDW-406 heat sink with or without the HDW-415 fan, or the HDW-408 heat pipe block – can be used in the user’s final system or only used during product development as a temporary bench-top solution. -
Page 64: Cpu Thermal Trip Points
Ideally, the CPU core temperatures will be kept well below 100 ºC with only brief excursions above. CPU temperature monitoring programs are available to run under both Windows and Linux. Table 22 lists some of these hardware monitoring programs. VL-EPU-3312 Reference Manual... -
Page 65: Table 22: Temperature Monitoring Programs
Thermal Considerations Table 22: Temperature Monitoring Programs Program Type Operating System Description Core Temperature http://www.alcpu.com/CoreTemp/ Windows Hardware Monitor http://www.cpuid.com/softwares/hwmonitor.html Open Hardware Monitor http://openhardwaremonitor.org/ Linux lm-sensors http://en.wikipedia.org/wiki/Lm_sensors VL-EPU-3312 Reference Manual... -
Page 66: Thermal Specifications, Restrictions, And Conditions
Due to the unknown nature of the entire thermal system, or the performance requirement of the application, VersaLogic cannot recommend a particular thermal solution. This information is intended to provide guidance in the design of an overall thermal system solution. -
Page 67: Epu-3312 Thermal Characterization
Test environment Thermal chamber Note: This device connects through a VersaLogic VL-CBR-4005B paddleboard. The test results reflect the test environment within the temperature chamber used. The airflow of this particular chamber is about 0.5 linear meters per second (~100 linear feet per minute). -
Page 68: Test Results
At 90% CPU utilization this single core unit operates within the CPU’s core temperature safe operating range all the way up to +85 ºC using only a heat sink. Figure 37. EPU-3312-EAP Single Core Temperature Relative to Ambient Temperature VL-EPU-3312 Reference Manual... -
Page 69: Figure 38. Epu-3312-Ebp Dual Core Temperature Relative To Ambient Temperature
90% CPU utilization. Adding the fan provides an additional 5-6 ºC of margin. For long-term reliability, ensure the CPU cores are predominately running with their temperatures below 100 ºC. Figure 38. EPU-3312-EBP Dual Core Temperature Relative to Ambient Temperature VL-EPU-3312 Reference Manual... -
Page 70: Figure 39. Epu-3312-Edp Quad Core Temperature Relative To Ambient Temperature
As shown below, the quad core version of the Raven will typically require a heat sink + fan for operation above 80 ºC, at >90% CPU utilization. Figure 39. EPU-3312-EDP Quad Core Temperature Relative to Ambient Temperature VL-EPU-3312 Reference Manual... -
Page 71: Figure 40. Epu-3312-Edp Quad Core With Heat Pipe - Temperature Relative To Ambient
25 ºC Same as above with an added HDW-415 fan on the HDW-406 Active Configuration heat sink Figure 40. EPU-3312-EDP Quad Core with Heat Pipe - Temperature Relative to Ambient VL-EPU-3312 Reference Manual... -
Page 72: Installing Versalogic Thermal Solutions
These assembly methods are shown in Figure 41 and Figure 42, respectively. Heat Plate Down Figure 41 (a representative image of a similar VersaLogic product) shows the assembly. Use this assembly method if you are attaching the Raven to a larger thermal solution such as a metal chassis/enclosure. -
Page 73: Installing The Vl-Hdw-406 Passive Heat Sink
Heat Plate Up Use this assembly method if you are adding a heatsink to the standard Raven heat plate. Figure 42 (a representative image of a similar VersaLogic product) shows the EPU-3310 assembly including the optional HDW-406 heatsink. Figure 42. Hardware Assembly with Heat Plate Up The recommended assembly method for this configuration is as follows: 1. -
Page 74: Figure 43. Installing The Passive Heat Sink
Thermal Considerations Figure 43. Installing the Passive Heat Sink VL-EPU-3312 Reference Manual... -
Page 75: Installing The Vl-Hdw-415 Heat Sink Fan
Affix the heat sink fan using four M3 pan head screws. Using a torque screwdriver, tighten the screws to 4.0 inch-pounds. 3. Connect power to the fan Connect the fan’s power cable to J18 on the EPU-3312. Figure 44. Installing the Heat Sink Fan VL-EPU-3312 Reference Manual... -
Page 76: Installing The Vl-Hdw-408 Heat Pipe Block
Affix the heat pipe block to the heat plate using six M2.5-0.45 x 10mm, Phillips, pan head screws. Using a torque screwdriver, tighten the screws to 4.0 inch-pounds. Figure 45. Installing the Heat Pipe Block VL-EPU-3312 Reference Manual... -
Page 77: Known Issues
In the USB Configuration menu, disabling the xHCI controller without enabling the EHCI controller prevents the use of all USB devices, including the keyboard. Without a keyboard to navigate BIOS Setup utility, the board may need to be returned to VersaLogic for repair. *** End of document ***...
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