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Diamond Point International

MEN Mikro XM50 - ESMexpress® COM with PowerPC® MPC8548

Up to 1.5 GHz, up to 2 GB (ECC) DDR2 SDRAM


The XM50 is a computer-on-module of the ESMexpress® family controlled by an integrated PowerPC® MPC8548 or MPC8543 CPU processor (optionally with encryption unit) with clock frequencies between 800 MHz and 1.5 GHz. Together with an application-specific carrier board it forms a semi-custom solution for industrial, harsh, mobile and mission-critical environments.

The XM50 accommodates up to 2 GB of directly soldered ECC main memory and supports other memory like USB Flash on the carrier board. It also features industrial FRAM and SRAM.

Interfaces from the MPC8548 are all routed from the XM50 for availability on any ESMexpress® carrier board. Those interfaces include up to three Gigabit Ethernet channels, 8 PCI Express® lanes for one link (x4, x2 or x1, or x8 as an option), triple SATA, 6 USB host ports and one USB client realized using a UART-to-USB converter. Additional COM interfaces can be made available on the carrier board via USB to COM conversion.

The XM50 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 XM50 is screened for operation in a -50°C to +85°C conduction or convection cooled environment. As all ESMexpress® modules it is embedded in a covered frame. This ensures EMC protection and allows efficient conductive cooling. Air cooling is also possible by applying a heat sink on top of the cover. Where operating temperatures are moderate, the module may even do without the frame and cover, with a suitable low-power processor and airflow. ESMexpress® modules are firmly screwed to a carrier board and come with rugged industry-proven connectors supporting high frequency and differential signals. Only soldered components are used to withstand shock and vibration, and the design is optimized for conformal coating. All ESMexpress® modules support a single 95x125mm form factor.

For evaluation and development purposes an ATX carrier board is available. The ESMexpress® module can be evaluated on a COM Express® carrier board via an adapter from ESMexpress® to COM Express®.



CPU SpecPowerPC® PowerQUICC™ III MPC8548, MPC8548E, MPC8543 or MPC8543E
800 MHz up to 1.5 GHz
Please see Standard Configurations for available standard versions.
e500 PowerPC® core with MMU and double-precision embedded scalar and vector floating-point APU
Integrated Northbridge and Southbridge
Memory2x 32 KB L1 data and instruction cache, 512 KB / 256 KB L2 cache integrated in MPC8548/MPC8543
Up to 2 GB SDRAM system memory, soldered, DDR2 with or without ECC, up to 300 MHz memory bus frequency
16 MB boot Flash
2 MB non-volatile SRAM
With GoldCap or battery backup on the carrier board
128 KB non-volatile FRAM
Serial EEPROM 8 kbits for factory settings
NetworkThree 10/100/1000Base-T Ethernet channels with MPC8548/E
Two 10/100/1000Base-T Ethernet channels with MPC8543/E
Two LED signals per channel for LAN link and activity status and connection speed
Accessible via ESMexpress® connector
StorageThree ports via ESMexpress® connector
SATA Revision 1.x support
Transfer rates up to 150 MB/s (1.5 Gbit/s)
Via PCI-to-SATA bridge
ExpansionOne x1 or one x2 or one x4 link via ESMexpress® connector
PCIe® 1.x support
Data rate 250 MB/s in each direction (2.5 Gbit/s per lane)
USBSix USB 2.0 host ports via ESMexpress® connector, OHCI and EHCI, up to 480 Mbit/s
One USB client port via ESMexpress® connector
Other1 GPIO line from board controller via ESMexpress® connector
Real-time clock (with GoldCap or battery backup on the carrier board)
Temperature sensor, power supervision and watchdog


Electrical+12V (9 to 16 V), 12 W max.
MechanicalDimensions: 95 mm x 125 mm (conforming to ESMexpress® specification)
ESMexpress® PCB mounted between a frame and a cover
Conformal CoatingOn request
QNX® (on request; support of the FPU is currently not provided by QNX®)
INTEGRITY® (Green Hills® Software) support available. Please contact Green Hills® for further information.
OS-9® (on request)
Temperature(operation): -50° to +85°C Tcase (ESMexpress® cover/frame) (screened)
(storage): -50° to +85°C
Humidity(operation): max. 95% non-condensing
(storage): max. 95% non-condensing
Weight250 g (incl. cover and frame)
Vibration1 g, 10 Hz - 150 Hz (EN 60068-2-6)
Shock15 g, 11 ms (EN 60068-2-27)
MTBF209,732h @ 40°C according to IEC/TR 62380 (RDF 2000)
Safety/CertificationPCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers
EMCMEN has performed general, successful EMC tests for ESMexpress® using the XC1 evaluation carrier according to:
EN 55022 (radio disturbance)
IEC 61000-4-2 (ESD)
IEC 61000-4-3 (electromagnetic field immunity)
IEC 61000-4-4 (burst)
IEC 61000-4-5 (surge)
IEC 61000-4-6 (conducted disturbances)
Warranty2 Years

Ordering Details

Board15XM50-00 MPC8548 / 1.33 GHz, 512 MB DDR2 DRAM, 2 MB SRAM, 128 KB FRAM, -50..+85°C screened

Please note that boards are supplied with no cables, software or manuals.
Software/manuals are available electronically.
Accessories08AE12-00 ESMexpress® module to COM Express® carrier adapter, 0..+60°C
08XC01-00 Evaluation and development board for all ESMexpress® modules (coming with top cover and frame), 0..+60°C, incl. faceplate, 4 GB USB Flash Disk and USB cable type A to A

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