A20 - 2eSST Intel Core 2 Duo CPU Board (Product Discontinued)

The A20 6U single-slot VMEbus SBC supports a variety of Intel Core Duo and Core 2 Duo processors from the high-end 1.5 GHz L7400 to the low-voltage dual-core versions down to a selection of single-core Celeron M types. It is designed especially for systems which require high computing and graphics performance and low power consumption in a typical Windows environment, under VxWorks or Linux.

Using the TSI148 bridge controller the CPU card provides 2eSST performance levels while maintaining backwards compatibility with older standards such as VME64 and VME32.

The standard I/O available at the front panel of the A20 includes graphics on a VGA connector, one Gigabit Ethernet and one USB 2.0 interface. As an option a COM interface on an RJ45 connector can be provided instead of the USB interface.

As rear I/O the A20 provides seven USB interfaces, one SATA port and PMC rear I/O.

A second SATA interface for connection of an onboard hard disk or for building up RAID systems is provided on-board instead of one PMC or XMC. One PATA interface supports the onboard CompactFlash slot.

The working memory comprises up to 4 GB DDR2 DRAM which is soldered to guarantee optimum shock and vibration resistance.

A total of six PCI Express lanes for high-speed communication (such as Gb Ethernet) are supported on the A20. One x1 PCIe link is used for the onboard Ethernet interface, three x1 links support the XMC slots, one x1 link supports the PMC slots via a PCI Express to PCI-X bridge and one x1 link is used for connection of the VMEbus bridge. The PMC slots support 64bit/66MHz (PCI-X).

Supervision of the processor and board temperature as well as a watchdog for monitoring the operating system complete the functionality of the SBC.

The A20 comes with a tailored passive heat sink within 4 HP height. However, forced air cooling is always required inside the system.

Equipped with Intel components exclusively from the Intel Embedded Line, the A20 has a guaranteed minimum standard availability of 5 years.

Its robust design make the A20 especially suited for rugged environments with regard to extended operating temperature, shock and vibration according to applicable DIN, EN or IEC industry standards. It is also ready for coating for use in humid and dusty environments. The wide range of industrial applications include for example monitoring, vision and control systems as well as test and measurement. Main target markets comprise industrial automation, security and infotainment, traffic and transportation, shipbuilding, medical engineering and robotics.


  • 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


  • 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)
  • Conformal coating on request
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)
BIOS/Boot Loader
Award BIOS
Software Support


Short-form Data Sheet
User Manuals
Application Notes
Errata & Technical Information