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Diamond Point International

MEN Mikro A20 - 6U VMEbus 2eSST Intel® Core™ 2 Duo CPU Board

Up to 4 GB (ECC) DDR2 RAM, 2 XMC/PMC Slots, Gigabit Ethernet


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.



CPU SpecUp 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
• Up to 4MB L2 cache integrated in Core 2 Duo
ChipsetNorthbridge: Intel® 945GME Express
Southbridge: Intel® ICH7-M DH
MemoryUp to 4GB SDRAM system memory
• Soldered
• DDR2
• 667MHz memory bus frequency
• Dual-channel, 2x64 bits
8Mbits bits boot Flash
Serial EEPROM 2kbits for factory settings
GraphicsIntegrated in 945GME Express chipset
• 200/250MHz 256-bit graphics core
VGA connector at front panel
• 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
StorageParallel 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

CompactFlash® card interface
• Via onboard IDE
• Type I
• True IDE
• DMA support
Front I/OVGA
One USB 2.0 (Series A)
One Ethernet (RJ45)
Rear I/OUSB 2.0, seven ports
PMC rear I/O (for one PMC)
One SATA channel
OtherBoard controller
Real-time clock, buffered by a GoldCap and a battery
Watchdog timer
Temperature measurement
One user LED
Reset button


ExpansionTwo 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

PCI Express®
• One x1 link to connect local 1000Base-T Ethernet controller
• 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
• 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
ElectricalSupply voltage/power consumption:
• +5V (-3%/+5%), 3.2A (idle)..6.6A (full load)
• 3.3V for XMC/PMC are generated on the board
MechanicalDimensions: standard double Eurocard, 233.3 mm x 160 mm
Front panel: 4HP with ejector
Conformal CoatingConformal coating on request
QNX® (on request)
TemperatureTemperature range (operation):
• 0..+60°C
• Airflow: min. 1.5m/s
Temperature range (storage): -40..+85°C
HumidityRelative humidity (operation): max. 95% non-condensing
Relative humidity (storage): max. 95% non-condensing
WeightWithout XMC/PMCs: 525g
Altitude-300 m to +3000 m
Vibration(sinusoidal): 1g/ 10..150Hz (EN 60068-2-6)
ShockShock: 15g/11ms (EN 60068-2-27)
Bump: 10g/16ms (EN 60068-2-29)
MTBF190,571h @ 40°C according to IEC/TR 62380 (RDF2000)
Safety/CertificationPCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers
EMCTested according to EN 55022 Class A (radio disturbance), EN 61000-4-2 (ESD), EN 61000-4-4 (burst) and EN 61000-4-5 (surge)
Warranty2 Years

Ordering Details

Intel® Core™ 2 Duo L7400, 1.5 GHz, 2 GB DDR2 DRAM, P0 not mounted, 0..+60°C
RS232 interface cable RJ45 to 9-pin D-Sub (1 COM to 1 COM), 2m

25 mounting screw sets to fix PMC/XMC modules on carrier boards

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