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BayCat (VL-EPM-31)

BayCat  (VL-EPM-31)Atom

Atom "Bay Trail" based SBC with PC/104-Plus expansion

PC/104-Plus platform with a low power 4th gen. Intel Atom E3845 (quad core), E3826 (dual core) or E3815 (single core) CPU. Up to 8 GB RAM, dual GbE, USB 3.0 and USB 2.0 ports, SATA, digital I/O, I2C, PWM, Mini PCIe/mSATA Socket, and SPI/SPX expansion.


  • Intel Atom "Bay Trail" Processor
    Up to 1.9 GHz clock rate. Quad, dual or single core options. Low power consumption.
  • High-performance Video
    Integrated Intel Gen 7 graphics core supports DirectX 11, OpenGL 4, and H.264, MPEG-2 encoding/decoding. Analog and DisplayPort video outputs; both outputs support multiple display modes including Extended Desktop and Clone.
  • Trusted Platform Module
    On-board TPM security chip can lock out unauthorized hardware and software.
  • RAM
    Up to 8 GB DDR3L socketed memory (one SO-DIMM).
  • Network
    Dual Ethernet interfaces, autodetect 10BaseT / 100BaseTX / 1000BaseT with remote boot support.
  • Industrial I/O
    One USB 3.0 port and four USB 2.0 ports support keyboard, mouse, and other devices. Dual RS-232/422/485 serial ports, three 8254 timer/counters, I2C, and audio support .
  • Digital I/O
    Twenty-four 3.3V digital I/O lines
  • SATA
    3 Gb/s SATA port. Supports rotating or solid state SATA drive.
  • Mini PCIe socket
    Supports Wi-Fi modems, GPS receivers, flash data storage with auto-detect mSATA flash storage support, and other mini PCIe modules.
  • SPI Interface
    Supports SPI and SPX devices, including low cost analog and digital modules.
  • Main Power Input
    5V Input ±5%
  • PC/104 Expansion
    Legacy PCI connector, stack-down
  • PC/104 Expansion
    Legacy ISA connector, stack-down
  • Industrial Temperature
    -40° to +85°C operation for harsh environments
  • PC/104 Form Factor
    Industry-standard PC/104-Plus expansion
  • MIL-STD-202G
    Qualified for high shock/vibration operation

Software Expertise: Reference & Software Expertise

OS Compatibility: Win 10 Windows/Win 8/Win 7, Windows Embedded Win Std 7, Linux, Wind River, QNX, DOS

Embedded PC/104+ ModuleRoHS-compliant



The BayCat is a low-power / high-performance single board computer (SBC) with a traditional PC/104-Plus expansion interface. This combination makes it easy to upgrade existing systems to a powerful 4th generation Atom processor, while preserving plug-in expansion to existing specialty I/O boards. In addition, it also contains a full complement of on-board I/O interfaces, including USB 3.0, mini PCIe expansion socket, TPM chip, and a 24 bit digital I/O port.

Driven by the low power E3800 (Bay Trail) processor, with clock rates up to 1.9 GHz, the BayCat features quad, dual, and single-core processor options. Based on the industry-standard PC/104 format (4.2 x 3.8 inches), this SBC is an excellent solution for size, weight and power (SWaP) sensitive applications.

BayCat is built on the PC/104 form factor. It includes legacy ISA and PCI connectors to interface directly with PC/104-Plus plug-in boards.

As with all VersaLogic products, the BayCat is designed to support OEM applications where high reliability and long-term availability are required. From application design-in support, to its 10+ year extended life programs, the BayCat provides a durable embedded computer solution with an excellent cost of ownership.

VersaLogic products are designed for use by OEMs working in a variety of market applications: Aerospace, Defense, Energy, Industrial, Security, Medical, Military, Robotics, and Transportation. Anywhere that the need for superb quality and high-performance embedded computing exists, applications include: automation, avionics, gateway, in-vehicle, monitoring, simulation, and vision.

VersaLogic delivers extremely reliable standard and customized embedded computers backed with unsurpassed service and the highest availability in the market. VersaLogic exists to exceed customers' product, service, support and delivery needs - whenever and wherever the need arises.


General Board Size PC/104 Compliant: 108 mm x 96 mm (4.23" x 3.77")
Weight 140 grams (4.93 oz.)
Processor Intel 4th Generation "Bay Trail" Atom E3845 (quad core), E3826 (dual core), or E3815 (single core). 512K L2 cache per core. Supports Intel 64-bit instructions, AES Instructions, Execute Disable Bit, and Virtualization Technology.
Battery Connector for external 3.0V RTC backup battery
Power Requirements (+5V)
Model Idle Typical Max.
VL-EPM-31EAP 4.80W 5.15W 5.50W
VL-EPM-31EBP 4.90W 5.20W 5.50W
VL-EPM-31ECP 5.00W 6.50W 8.00W
Input Voltage 5V ± 5%
System Reset & Hardware Monitors Major voltage rails monitored. Watchdog timer with programmable timeout. CPU temperature and fan speed monitoring. Push-button reset and power.
Stackable Busses PC/104-Plus format. Legacy ISA and PCI connectors.
Regulatory Compliance RoHS (2011/65/EU)
Environmental Cooling Options Bolt-down heat plate standard. Optional Heat sink, Heat sink with fan, heat pipe, and other adaptors available.
Operating Temperature ◊
Model Heat Plate** Heat Sink Heat Sink + Fan
All Models -40°C to +85°C -40°C to +85°C -40°C to +85°C

Ranges shown assume 90% CPU utilization. For detailed thermal information, refer to the VL-EPM-31 Reference Manual.
**Heat plate must be kept below 90°C

Airflow Requirements Refer to the VL-EPM-31 Reference Manual for detailed airflow requirements.
Storage Temperature -40°C to +85°C.
Operating* To 15,000 ft. (4,570m)
Storage To 40,000 ft. (12,000m)
Thermal Shock 5°C/min. over operating temperature
Humidity Less than 95%, noncondensing
Vibration, Sinusoidal Sweep ¤ MIL-STD-202G, Method 204, Modified Condition A: 2g constant acceleration from 5 to 500 Hz, 20 min. per axis
Vibration, Random ¤ MIL-STD-202G, Method 214A, Condition A: 5.35g rms, 5 min. per axis
Mechanical Shock ¤ MIL-STD-202G, Method 213B, Condition G: 20g half-sine, 11 ms duration per axis
Security TPM Trusted Platform Module 1.2 device: Atmel - AT97SC3204-U2MA-20
Memory System RAM One SO-DIMM socket. Up to 8 GB DDR3L (1.35V) SDRAM.
Memory Speed 1066 MHz or 1333 MHz, CPU dependent
Video General Integrated high-performance video. Intel Gen-7 graphics core with 4 Execution Units and Turbo Boost. Supports 2 independent displays. Supports DirectX 11, OpenGL 4.0, VP8, MPEG2, H.264, VC1, 2 HD streams (1080p@30fps), Flash and WMP support.
Hardware Based Format
Decode H.264, MPEG2, MVC, VC-1, WMV9, VP8, MJPEG
Encode H.264, MPEG2, MVC
Analog (VGA) and mini DisplayPort video interfaces support Extended Desktop, Clone, and Twin display modes. Optional adapter card converts DisplayPort output to LVDS for flat panel operation.
VRAM Up to 224 MB shared DRAM
Desktop Display Interface Standard analog output (VGA). 24-bit. Up to 2560 x 1600 (60 Hz).
DisplayPort Interface § Support DisplayPort Standard Version 1.1
Mini DisplayPort++ output supports DisplayPort and HDMI signaling (Video and Audio outputs). 24-bit. Up to 2560 x 1600.
Mass Storage Rotating Drives /Flash / Solid State Drives ¥ Single SATA (Revision 2.0) port. Latching connector.
mSATA modules (SATA signaling, bootable).
One microSD socket. Supports up to 32 GB. Bootable.
Network Interface Ethernet Two autodetect 10BaseT/100BaseTX/1000BaseT ports. On-board status LEDs and external LED header. IEEE 1588 Precision Time Protocol (PTP) slave compatible. Latching headers
Network Boot Option Via on-board BIOS extension
Device I/O USB ठFour USB 2.0 host ports and one USB 3.0 host port.
COM 1 / 2 Interface RS-232/422/485 selectable. 16C550 compatible. 460 Kbps.
Digital I/O Twenty-four TTL I/O lines (3.3V). Independently configurable.
I2C Single I2C interface (3.3V)
Audio Via DisplayPort and HDMI interfaces, or optional VL-ADR-01 audio interface.
Counter / Timers Three 8254 compatible Programmable Interval Timers (PITs).
OTHER I/O Mini PCIe / Socket Full-length Mini PCIe socket. Supports Wi-Fi modems, GPS receivers, non-volatile flash data storage with auto-detect mSATA support, and other plug-in modules.
SPI Interface Supports SPI and SPX devices. Supports up to two SPX modules.
Software BIOS Phoenix Technologies UEFI BIOS. Field reprogrammable. Support for USB keyboard/mouse and USB boot.
VersaAPI VersaLogic Application Programming Interface to support on-board I/O devices.
Sleep Mode ACPI 3.0. Support for S3 and S4 suspend states and C1 processor state.
Operating Systems Compatible with most x86 operating systems including Windows, Windows Embedded, Linux, VxWorks, and QNX.
† Represents operation at +25°C with +5V supply running Windows 7. Typical power computed as the mean value of Idle and Maximum power specifications. Maximum power is measured with 95% CPU utilization.
◊ Derate -1.1°C per 305m (1,000 ft.) above 2,300m (7,500 ft.)
* For extended altitude information contact VersaLogic Sales Dept.
‡ TVS protected port (enhanced ESD protection)
§ Power pins on this port are overload protected
¥ Bootable storage device capability
¤ MIL-STD-202G shock and vibration levels are used to illustrate the extreme ruggedness of this product in general. Testing at higher levels and/or different types of shock or vibration methods can be accommodated per the specific requirements of the application. Contact a VersaLogic Sales Engineer for further information.

Specifications are subject to change without notification. Intel and Atom are trademarks of Intel Corp. PC/104 and PCIe/104-Plus are trademarks of the PC/104 Consortium. PCI Express is a registered trademark of PCI-SIG. SATA and mSATA are trademarks of the Serial ATA International Organization. All other trademarks are the property of their respective owners.

Software Support Packages

Windows Win 10
  • DRV-WIN10-BAYTRAIL - 1.0.0
    Driver Package (DRV) for VersaLogic boards based on the Baytrail platform including Viper (VL-EBX-38), BayCat (VL-EPM-31), SandCat (VL-EPM-39), Bengal (VL-EPMe-30), Osprey (VL-EPU-3311), and Raven (VL-EPU-3312). This package contains drivers for chipset, network, and IO.

Windows Win 7
  • DRV-WIN7-BAYTRAIL - 2.0.0
    Driver Package (DRV) for VersaLogic boards based on the Baytrail platform including Bengal (VL-EPMe-30), Baycat (VL-EPM-31), Hawk (VL-EPU-3310), Osprey (VL-EPU-3311), and Raven (VL-EPU-3312). This package contains drivers for chipset, network, IO, and video.
  • DRV-WIN7(xx)-BayTrail Win 7 - 1.0.0
    Driver Package (DRV) for VersaLogic SBCs based on the Intel E38xx BayTrail (4th GenerationAtom) platform. This package contains drivers for chipset, network, storage, and video.

Windows Embedded Win Std 7
  • VersaAPI 1.3.1 for WES7 - 1.3.1
    VersaAPI Application Programming Interface (API) Device drivers and VersaAPI included. Provides simplified I/O interface for most application languages.
  • BSP-WES7-BTRL - 1.0.0
    Board Support Package (BSP) for VersaLogic SBCs based on theBayTrail platform. This package contains TAP files, an ICE project file, utilities, and drivers not natively supported by the WES7 Distribution Share (DS).

Linux Ubuntu
  • VersaAPI 1.4.2 for Linux (Ubuntu) 32- and 64-bit - 1.4.2
    VersaAPI Application Programming Interface (API) Device drivers and VersaAPI included. Provides simplified I/O interface for most application languages.
    Supported Products: Raven (EPU-3312), Osprey (EPU-3311), Bengal (EPMe-30), Baycat (EPM-31), Anaconda (EBX-18), Fox (EPM-19)
  • Ubuntu Home Page -
    Link to the Ubuntu website OS download page. Note that the EPMe-30 Bengal has been tested by VersaLogic with Ubuntu Linux 14.04 LTS 32-bit and 64-bit operating systems.

Linux Knoppix
  • Knoppix Home Page -
    Link to the Knoppix website OS download page. Note that compatibility with the EPMe-30 Bengal has been verified by VersaLogic with Knoppix Linux 7.4.2.

Operating System Compatibility

Win 10 - Tested & Compatible
Win 8 - Meets Specifications
Win 7 - Tested & Compatible
Win XP - Not Compatible
Win Std 7 - Tested & Compatible
Win XPe - Not Compatible
Debian - Meets Specifications
Ubuntu - Tested & Compatible
Knoppix - Tested & Compatible
VxWorks - Meets Specifications
Neutrino - Meets Specifications
DOS - Tested & Compatible

OS Compatibility Notes

  • Tested on Microsoft Windows 7 Ultimate, 64-bit, 6.1.7601 Service Pack 1 Build 7601
  • Tested on Ubuntu Linux 14-04, 64-bit
  • Tested on Ubuntu 14.04 LT 32-bit
  • Tested on Knoppix 7.2.0 kernel 3.9.6, 32-bit
    Tested on Knoppix 7.4.2 kernel 3.16.2, 32-bit


Part Number Description Photo
Cable Kit
VL-CKR-BAYCATEPM-31 BayCat Eval. Cable Kit. Includes VL-CBR-4005, 0702, 1008, 1014, 1015, 1204, 1604, 2005, HDW-105, and HDW-401
VL-CBR-4005System I/O paddleboard
VL-CBR-0702SATA cable, latching, 19.75"
VL-CBR-1008ATX power adapter cable, 10-pin . 12"
VL-CBR-1014RS232 two channel cable 2xDsub (9-pin), latching, 12"
VL-CBR-1015USB 3.0 Micro A plug to 3.0 Micro B plug, 1 m
VL-CBR-1204VGA interface cable, 12-pin PicoClasp to 15-pin VGA, 12"
VL-CBR-1604Dual Ethernet adapter cable, latching, 12"
VL-CBR-2005Digital I/O cable and paddleboard, 1mm 20-pin, 12"
VL-HDW-105Standoff package, 0.6", Metric thread
VL-HDW-401Thermal compound paste. For attaching heat plates and sinks.
Thermal Options
VL-HDW-412Passive Heat Sink. Mounts to product's heat plate. 50 x 85 x 16mm
VL-HDW-407Cooling fan for HDW-406 and HDW-412 passive heat sink. 5V
VL-CBR-0401Power cable, ATX to SATA, 6.25"
VL-CBR-0503USB 2.0 Male A to Male Micro-B cable, 0.5 m
VL-CBR-0701SATA cable, 19.75"
VL-CBR-0901Pico-Clasp to two SPX cables, 9-pin. 9"
VL-CBR-2031miniDisplayPort to miniDisplayPort, 36"
VL-CBR-2032miniDisplayPort to VGA adapter, 6"
VL-CBR-2033miniDisplayPort to HDMI active adapter, requires DP port, 6"
VL-MM9-2EBNDRAM 2 GB, PC3-12800 SODIMM DDR3L module (1.35v), industrial temperature
VL-MM9-2SBNDRAM 2 GB, PC3-12800 SODIMM DDR3L module (1.35v), standard temperature
VL-MM9-4EBNDRAM 4 GB, PC3-12800 SODIMM DDR3L module (1.35v, industrial temperature
VL-MM9-4SBNDRAM 4 GB, PC3-12800 SODIMM DDR3L module (1.35v), standard temperature
VL-MM9-8EBNDRAM 8 GB, PC3-12800 SODIMM DDR3L module (1.35v), industrial temperature
VL-MM9-8SBNDRAM 8 GB, PC3-12800 SODIMM DDR3L module (1.35v), standard temperature
Solid State Drives
VL-F41-2EBNSSD 2 GB SLC MicroSD card, industrial temperature
VL-F41-4EBNSSD 4 GB SLC MicroSD card, industrial temperature
VL-F41-8EBNSSD 8 GB SLC MicroSD card, industrial temperature
VL-ADR-01S USB to Audio Adapter -25 to +85C
VL-PS200-ATX 200W ATX-style development power supply (20+4+4-pin ATX connector)
VL-DEV-USB-VV1 VersaViewer: A real-time viewer for embedded hardware developers.
VL-HDW-108Mini PCIe card / mSATA 10x hold-down screws for use with 2.5 mm standoffs, Metric thread, Nylon
VL-HDW-111Half- to Full-Size MiniPCIe Adapter Kit. Metal adapter and 2x screws.
VL-HDW-203PC/104 extractor tool (metal)
VL-EPH-V6 Display Port to Dual Channel LVDS converter

Expansion Modules

Part Number Description Form Factor
VL-MPEe-E3E Gigabit Ethernet Adapter, industrial temperature (PCIe signaling)Mini PCIe
VL-MPEe-E4E Gigabit Ethernet Over Fiber Optic media (PCIe signaling)Mini PCIe
VL-MPEe-E5E Two Channel Gigabit Ethernet Adapter (PCIe signaling)Mini PCIe
VL-MPEe-FW1E 1394 Firewire Module, industrial temperature (PCIe signaling)Mini PCIe
Serial I/O
VL-MPEe-U2E RS-232/422/485 x4 + GPIO x12 Module, industrial temperature (PCIe signaling)Mini PCIe
Analog & Digital I/O
VL-MPEe-A1E Analog Input Module, x8 channels single ended (12-bit resolution), industrial temperature (PCIe signaling)Mini PCIe
VL-MPEe-A2E Analog Input Module, x8 channels single ended (16-bit resolution), industrial temperature (PCIe signaling)Mini PCIe
VL-SPX-1 Analog Input Module, x8 Channels, industrial temperatureSPX
VL-SPX-2 Digital I/O Module, x16 lines, industrial temperatureSPX
VL-SPX-4 Analog Output Module, x4 single channels 12-bit, industrial temperatureSPX
VL-SPX-5 Solid State Switch Module, x8 channels, industrial temperatureSPX
VCM-DAS-2 Analog Input, x16 (16-bit resolution) 200kHz + Digital I/O x16PC/104
VCM-DAS-3a Analog Output x16 (12-bit resolution) + Digital I/O x24, industrial temperaturePC/104
VL-MPEu-G2E GPS Receiver, industrial temperature (USB signaling)Mini PCIe
VL-MPEu-G3E Precision GPS Receiver, industrial temperature (USB signaling)Mini PCIe
Solid-State Storage (flash memory)
VL-MPEs-F1E32 32 GB mSATA drive, industrial temperature (SATA signaling)MSATA
VL-MPEs-F1E16 16 GB mSATA drive, industrial temperature (SATA signaling)MSATA
VL-MPEs-F1E4 4 GB mSATA drive, industrial temperature (SATA signaling)MSATA
VL-EPM-P2E PC/104-Plus Mini PCIe socket x2 adapter, industrial temperaturePC/104-Plus
VL-MPEs-S3E SATA Adapter, industrial temperature (SATA signaling)MSATA
In-Stack Power Supply
VL-EPM-PS1a Power supply in-stack, industrial temperaturePC/104-Plus

Ordering Information

Model Processor Cores Speed DDR MAX
Graphics Frequency
Cooling Digi-Key logo
VL-EPM-31EAP Atom E3815 Single 1.46 GHz 1066 MHz 400 MHz / none -40 to +85C Heat plate
VL-EPM-31EBP Atom E3826 Dual 1.46 GHz 1066 MHz 533 MHz/ 667 MHz -40 to +85C Heat plate
VL-EPM-31ECP Atom E3845 Quad 1.91 GHz 1333 MHz 542 MHz/ 792 MHz -40 to +85C Heat plate

Export Information

Description Value
SCHEDULE B:8471.60.7000