Model Interpretation

MVME: Motorola VME single board computer series identifier

5100: mid-range PowerPC SBC model; suffix codes define RAM size, flash capacity and temperature grade.

Technical Specifications

Processor & Cache

CPU: MPC755 PowerPC, 300MHz / 366MHz / 466MHz options with built-in FPU

Cache: 32KB Instruction Cache, 32KB Data Cache, 256KB on-chip L2 Cache

Memory & Storage

Onboard ECC SDRAM: standard 128MB, max expandable to 512MB

Onboard Flash: 8MB preloaded with MOTLoad boot firmware, optional CF socket for external storage

NVRAM:32KB non-volatile RAM for system configuration retention after power loss

Electrical & Environment

Power supplied from VME backplane (+5V, ±12V); typical power draw ~12W

Standard temp: 0℃ ~ +55℃ (forced air cooling); wide temp version: -40℃ ~ +85℃

Storage: -40℃~+85℃; humidity 5%~95%RH non-condensing; CE/FCC Class A compliance

Interface & Communication Configuration

Front Panel Ports

1×RJ45 10/100BASE-TX Ethernet

2×DB9 RS232/RS422 serial debug ports

Status LEDs: PWR, RUN, FAULT, LAN indicator

Backplane & Expansion Bus

VME64 via P1/P2 edge connector, Universe I VME bridge, supports A16/A24/A32 address space

1×IEEE1386 standard PMC slot; jumper selectable: front panel IO or rear P2 transition board routing

Onboard watchdog timer, general-purpose GPIO & hardware reset circuit

Core Functions

MOTLoad firmware implements power-on self-test, hardware diagnosis, OS download and flash programming; compatible with VxWorks, QNX, Embedded Linux real-time OS.

Acts as VME master/slave to manage rack-wide VME modules for synchronous data acquisition and logic control.

Expand Profibus, CAN, analog DAQ via PMC daughter card without occupying additional VME slots.

Hardware watchdog triggers automatic reset when program runaway occurs; onboard continuous self-diagnosis with fault LED alert.

Application Scenarios

Locomotive auxiliary control unit, nuclear non-safety DCS cabinet, industrial automated test bench, marine auxiliary monitoring system, conventional military ground test instrumentation.

Operation & Maintenance Notes

Power off rack before plugging/unplugging PMC cards to avoid PCI voltage spike damage

Adjust onboard jumpers to switch between front IO and rear transition board IO

Clean chassis ventilation dust regularly to prevent overheating during long continuous operation

Write OS image into onboard Flash via MOTLoad for fast recovery after unexpected power outage