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A20 - 2eSST Intel Core 2 Duo CPU Board

6U VMEbus

The A20 is a 6U single-slot multi-core VMEbus SBC supporting a variety of Intel Core Duo and Core 2 Duo processors and offering two XMC or PMC slots.

  • A20 Product ImageA20 6U VMEbus 2eSST Intel Core 2 Duo CPU Board
  • A20 Product ImageA20 2eSST Intel Core 2 Duo CPU Board with 2 PMCs installed
  • A20 Product Image
  • A20 Product Image

Main Features

  • Intel Core 2 Duo L7400
  • Core Duo U2500 or L2400
  • 1-slot 2eSST VMEbus master and slave
  • Up to 4 GB DDR2 DRAM soldered
  • 2 SATA, 1 PATA interface
  • 1 VGA at front
  • 1 Gb Ethernet at front
  • 1 USB at front
  • 2 XMC or 2 PMC
  • PCI Express six x1 links
  • Board controller
A20 Product Image

Technical Data

  • Up to Intel Core 2 Duo L7400
    • Dual-core 64-bit processor
    • Up to 1.5GHz processor core frequency
    • Up to 667MHz front-side bus frequency
  • Chipset
    • Northbridge: Intel 945GME Express
    • Southbridge: Intel ICH7-M DH
  • 4MB L2 cache integrated in Core 2 Duo
  • Up to 4GB SDRAM system memory
    • Soldered
    • DDR2
    • 667MHz memory bus frequency
    • Dual-channel, 2x64 bits
  • CompactFlash card interface
    • Via onboard IDE
    • Type I
    • True IDE
    • DMA support
  • 8Mbits boot Flash
  • Serial EEPROM 2kbits for factory settings
Mass Storage
  • Parallel IDE (PATA)
    • One IDE port for local CompactFlash
  • Serial ATA (SATA)
    • One channel for onboard hard disk
    • One channel via rear I/O connector P2
    • Transfer rates up to 150MB/s
    • RAID level 0/1 support
  • Integrated in 945GME Express chipset
    • 200/250MHz 256-bit graphics core
  • VGA connector at front panel
  • USB
    • One USB 2.0 port via Type A connector at front panel
    • Seven USB 2.0 ports via rear I/O
    • UHCI implementation
    • Data rates up to 480Mbit/s
  • Ethernet
    • One 10/100/1000Base-T Ethernet channel at front panel
    • RJ45 connector at front panel
    • Ethernet controller connected by one x1 PCIe link
    • Onboard LEDs to signal activity status and connection speed
Front Connections
  • VGA
  • One USB 2.0 (Type A)
  • One Ethernet (RJ45)
Rear I/O
  • USB 2.0, seven ports
  • PMC rear I/O (for one PMC)
  • One SATA channel
Mezzanine Slot
  • Two slots usable for PMC or XMC
  • XMC slots
    • Compliant with XMC standard VITA 42.3-2006
    • Two x1 PCI Express links for slot 2
    • One x1 PCI Express link for slot 1
  • PMC slots
    • Compliant with PMC standard IEEE 1386.1
    • PCI / PCI-X 32/64 bit, 33/66MHz, 3.3V V(I/O)
    • One x1 PCI Express link via PCI Express to PCI-X bridge
    • PMC I/O module (PIM) support (for one PMC)
    • Current limited to 2A for 5V and 3.3V
  • Board controller
  • Real-time clock, buffered by a GoldCap and a battery
  • Watchdog timer
  • Temperature measurement
  • One user LED
  • Reset button
PCI Express
  • One x1 link to connect local 1000Base-T Ethernet controller
  • Three x1 links to connect XMC
  • One x1 link to connect PMC via PCI Express to PCI-X bridge
  • One x1 link to connect the VME bridge via a PCI Express to PCI-X bridge
  • Data rate up to 250MB/s in each direction (2.5 Gbit/s per lane)
  • IDT TSI148 controller
  • Compliant with VME64 Specification
  • Supports VME32, VME64, 2eVME and 2eSST (VITA 1.5)
  • Maximum data rate 250 MB/s (limited by PCI Express link)
  • Slot-1 function with auto-detection
  • Master
    • D08:D16:D32:D64:A16:A24:A32:A64:BLT:MBLT:RMW
  • Slave
    • D08:D16:D32:D64:A16:A24:A32:A64:BLT:MBLT
  • DMA
  • Mailbox functionality
  • Bus timer
  • Location Monitor
  • Interrupter D08(O):I(7-1):ROAK
  • Interrupt handler D08(O):IH(7-1)
  • Single level 3 fair requester
  • Single level 3 arbiter
Electrical Specifications
Supply voltage/power consumption:
  • +5V (-3%/+5%), 3.2A (idle)..6.6A (full load)
  • 3.3V for XMC/PMC are generated on the board
Mechanical Specifications
  • Dimensions: standard double Eurocard, 233.3mm x 160mm
  • Front panel: 4HP with ejector
  • Weight:
    • Without XMC/PMCs: 525g
Environmental Specifications
  • Temperature range (operation):
    • 0..+60°C
    • Airflow: min. 1.5m/s
  • Temperature range (storage): -40..+85°C
  • Relative humidity (operation): max. 95% non-condensing
  • Relative humidity (storage): max. 95% non-condensing
  • Altitude: -300m to + 3,000m
  • Shock: 15g/11ms (EN 60068-2-27)
  • Bump: 10g/16ms (EN 60068-2-29)
  • Vibration (sinusoidal): 1g/ 10..150Hz (EN 60068-2-6)
190,571h @ 40°C according to IEC/TR 62380 (RDF2000)
PCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers
Tested according to EN 55022 Class A (radio disturbance), EN 61000-4-2 (ESD), EN 61000-4-4 (burst) and EN 61000-4-5 (surge)
Award BIOS
Software Support
  • Windows
  • Linux
  • VxWorks
  • QNX (on request)
  • Intel Virtualization Technology, allows a platform to run multiple operating systems and applications in independent partitions; one computer system can function as multiple "virtual" systems
  • For more information on supported operating system versions and drivers see Software.


  • Core 2 Duo L7400, 1.5GHz LV
  • Core Duo L2400, 1.66GHz LV
  • Core Duo U2500, 1.2GHz ULV
  • Celeron M 423, 1.06 GHz
  • System RAM
    • 512 MB, 1 GB, 2 GB or 4 GB
  • CompactFlash
    • 0 MB up to maximum available
UART (instead of front USB and one PCI Express link)
  • One RS232 via adapter cable (see Accessories)
  • One RJ45 connector at front panel
  • Data rates 300bit/s..230kbit/s
  • FIFO receive and transmit buffers for high data throughput
  • Handshake lines: full support
Some of these options may only be available for large volumes.
Please ask our sales staff for more information.

Ordering Information

Mass Storage

CompactFlash card, 4 GB, Type I, fixed bit set, -40 to +85°C


CompactFlash card, 16 GB, -40 to +85°C


CompactFlash card, 2 GB, Type I, fixed bit set, -40 to +85°C

Systems & Card Cages

MEN delivers turn-key systems completely installed (hardware, operating system, accessories), wired and tested. Different rack sizes, power supplies and backplanes on request.
For details please contact your local sales representative.



The MDIS5 system package includes most standard device drivers for Linux available from MEN.


VME4WIN/MDIS5 Software Package (MEN) - VMEbus support under Windows XP/Vista/Windows 7 for MEN A19 and A20


Windows chipset graphics driver (Intel) for F15, F17, D9, A19 and A20


Windows USB2UART driver (FTDI) for F14, F15, F17, F18, F19P, F21P, F22P, F23P, D9, A19, A20, XM2 and XM50 / XM51 / F50P / F50C hosts


Windows chipset driver (Intel) for F14, F15, F17, F18, F18E, F19P, F21P, F22P, G20, G22, XM2, CB70C, D9, D6, D7, D601, A19 and A20


Windows Installset (MEN) for F14, F15, F17, F18, D9, D601, A19 and A20


VxWorks 6.6 BSP for A19 and A20


MDIS5 System (and Device Driver) Package (MEN) for VxWorks. This software package includes most standard device drivers available from MEN.

This product includes a specially adapted BIOS.

System BIOS for A19 and A20


Intel software development products such as analyzers, compilers, threading tools etc. can be downloaded under www.intel.com/cd/software/products/asmo-na/eng/index.htm.
IA-32 Intel Architecture Software Developer's Manuals are available under www.intel.com/products/processor/manuals/index.htm.


Data Sheets
User Manuals
Errata & Technical Information
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