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Diamond Point International

MEN Mikro A12B - 6U VMEbus MPC8245 CPU Board (M-Modules)

256 MB DRAM, CompactFlash®, Dual 10/100-Mbit Fast Ethernet


The A12B is a single-board computer for embedded applications based on the PowerPC® MPC 8245. It can be used as a master or slave in a VMEbus environment or as a stand-alone card. The A12 provides up to 1MB local dual-ported SRAM for slave access and communication between the local CPU and another VMEbus master.

The CPU card comes with the MPC8245 PowerPC® with 300MHz clock frequency and a local 32-bit/33-MHz PCI data bus. It is a complete state-of-the-art SBC offering DRAM, Flash and CompactFlash® memory, dual Fast Ethernet, 4 COMs, USB, IDE and keyboard/mouse interfaces as well as an optional onboard hard disk. A software-loadable FPGA is available for individual user-defined functions such as additional UARTs, a CAN bus interface, DSP functions etc.

In addition, the A12B CPU board can be equipped with M-Module mezzanine cards. M-Modules are recommended for real-world I/O like analog/binary process I/O and instrumentation I/O. The modular combination of I/O functionality on a single-board computer allows to build up tailored control systems which appear as customized solutions based on standard components.

The A12 comes with MENMON support. This firmware/BIOS can be used for bootstrapping operating systems (from disk, flash or network), for hardware testing, or for debugging applications without running any operating system.

The A12 single-board computer is partly compatible with the MVME2100 board by Motorola.



CPU SpecPowerPC®
• MPC8245
• 300 MHz
• Double precision FPU
• L1 Cache integrated in MPC8245
MemoryUp to 512 MB SDRAM system memory
• One 144-pin SO-DIMM slot for SDRAM modules
• 100 MHz memory bus frequency
2 MB Flash
Serial EEPROM 2 KB for factory settings
• Two 10/100Base-T Ethernet channels
• RJ45 connector at front panel with two LEDs
StorageCompactFlash® card interface
• Via onboard IDE
• Type I
• True IDE

Parallel IDE (PATA)
• One port for local CompactFlash®
• One port for local hard-disk drive
• Drive can be connected via ribbon cable or mounted directly on the CPU board using MEN adapter kit
• Only one VMEbus slot needed even with hard disk
• One USB 1.1 port
• Available via I/O connector
• External PHY
• Data rates up to 12 Mbit/s
SerialOne UART (COM2)
• Accessible via I/O connector
• Physical interface using SA-Adapter via 10-pin ribbon cable on I/O connector
• RS232..RS485, isolated or not: for free use in system (e.g., cable to front)
• 16-byte transmit/receive buffer
• Handshake lines: CTS, RTS; DCD, DSR, DTR; RI

• Accessible via I/O connector
• Physical interface using SA-Adapter via 10-pin ribbon cable on I/O connector
• RS232..RS485, isolated or not: for free use in system (e.g., cable to front)
• Handshake lines: none
OtherPS/2 keyboard/mouse
• Accessible via I/O connector
• Requires external PHY


ExpansionThree M-Module slots
• Compliant with M-Module standard
• Characteristics: D16, D32, A08, A24, INTA, INTC

Local PCI Bus
• 32-bit/33-MHz, 3.3V V(I/O)
• Compliant with PCI Specification 2.2

• Slot-1 function with auto-detection
• Master: D08(EO):D16:A24:A16, transfer rate max. 7 MB/s
• Slave: D08(EO):D16:A24:BLT, transfer rate max. 15 MB/s
• Up to 1 MB shared fast SRAM
• Interrupter D08(O):I(7-1):ROAK
• Interrupt handler D08(O):IH(7-1)
• Single level 3 fair requester
• Single level 3 arbiter
• Bus timer
ElectricalSupply voltage/power consumption:
• +5 V (-3%/+5%), 1.65 A typ.
• ±12 V (-5%/+5%), only used for mezzanines, tbd.
MechanicalDimensions: standard double Eurocard, 233.3 mm x 160 mm
Conformal CoatingConformal coating on request
TemperatureTemperature range (operation):
• 0..+60°C or -40..+85°C (screened)
• Airflow: min. 10 m³/h
Temperature range (storage): -40..+85°C
HumidityRelative humidity (operation): max. 95% non-condensing
Relative humidity (storage): max. 95% non-condensing
WeightWeight (without mezzanines and accessories): 273 g
Vibration(sinusoidal): 2 g, 10..150 Hz
ShockShock: 15 g, 11 ms
Bump: 10 g, 16 ms
MTBF63 000 h @ 50°C (derived from MIL-HDBK-217F)
Safety/CertificationPCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers
EMCTested according to EN 55022 (radio disturbance), IEC1000-4-2 (ESD) and IEC1000-4-4 (burst)
Warranty2 Years

Ordering Details

A12B, MPC8245, 300MHz, 256 MB SDRAM, 2MB Flash, 3 M-Module slots, 0..+60°C
A21B, Freescale™ QorIQ™ single-core P1013, 800 MHz, 1 GB DDR3 ECC SDRAM, 32 MB Flash, 3 M-Module slots, -40 to +85°C screened

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