Motorola MVME133A-20 – High-Performance VMEbus Single-Board Computer | MVME100 Series
Engineering Background: The MVME133A-20 is part of Motorola’s MVME100 series of VMEbus single-board computers, built around the Motorola MC68030 32-bit microprocessor running at 20 MHz. Designed for demanding embedded control and industrial automation environments, this SBC delivers deterministic real-time performance within the IEEE 1014-1987 VMEbus standard architecture.
Product Positioning: Targeted at OEM system integrators, process control engineers, and industrial automation architects who require a proven, long-lifecycle VMEbus compute module. The MVME133A-20 is a direct fit for legacy system maintenance, DCS/SCADA upgrades, and new VMEbus chassis deployments where 68030-class processing is specified.
Complete Technical Specifications
- SKU / Part Number: MVME133A-20
- Manufacturer: Motorola (now part of Emerson / Artesyn Embedded Technologies lineage)
- Series / Platform: MVME100 VMEbus SBC Series
- CPU: Motorola MC68030 32-bit CISC processor
- Clock Speed: 20 MHz
- Bus Standard: VMEbus (IEEE 1014-1987), A32/D32 capable
- Bus Width: 32-bit data, 32-bit address
- On-Board RAM: Up to 4 MB DRAM (configuration dependent)
- ROM / Flash: Boot EPROM socket (27C series compatible)
- Serial I/O: Dual RS-232C/RS-422 serial ports (Z85C30 SCC)
- Parallel I/O: Centronics-compatible parallel port
- Ethernet: 10BASE-T / AUI LAN interface (optional, configuration dependent)
- SCSI: NCR 53C710 SCSI-2 controller (optional)
- Timer: Programmable interval timer, watchdog timer
- Interrupt Controller: VMEbus interrupt handler, 7-level priority
- Operating Temperature: 0°C to +55°C (commercial grade)
- Storage Temperature: -40°C to +85°C
- Power Supply: +5 VDC (±5%), +12 VDC, -12 VDC via VMEbus P1/P2 connectors
- Board Format: 6U VMEbus (233.35 mm × 160 mm)
- Weight: Approx. 300 g
- Compliance: IEEE 1014-1987 VMEbus, FCC Class A, CE Mark
Proven Application Environments
- Distributed Control Systems (DCS) — process plant automation and loop control
- SCADA front-end processors and remote terminal units (RTU)
- CNC machine tool controllers and motion sequencing platforms
- Telecommunications switching and signaling infrastructure
- Military and aerospace embedded computing (MIL-STD-461 compatible chassis)
- Medical imaging and laboratory instrumentation
- Power generation and substation automation systems
- Legacy VMEbus system life extension and board-level replacement
Engineering Advantages
- Deterministic Real-Time Performance: MC68030 with on-chip MMU and cache delivers predictable interrupt latency critical for closed-loop control.
- Full VMEbus A32/D32 Compliance: Supports block transfer (BLT) and multiplexed address/data cycles for high-throughput backplane communication.
- Long Lifecycle Availability: Motorola MVME boards are maintained in industrial supply chains well beyond commercial EOL, ensuring multi-year spares availability.
- Broad OS Support: Compatible with VxWorks, OS-9, pSOS, LynxOS, and bare-metal firmware environments.
- Modular Expansion: P2 connector supports mezzanine and PMC expansion for custom I/O.
- Robust ESD & EMI Design: Designed to IPC-A-610 Class 3 assembly standards for industrial reliability.
System Architecture & Signal Flow
The MVME133A-20 operates as a VMEbus System Controller (Slot 1) or non-controller node. The MC68030 CPU interfaces to local DRAM and ROM via a 32-bit local bus. The VMEbus interface chip (VMECHIP2 or equivalent ASIC) arbitrates backplane access, handles DMA transfers, and manages interrupt acknowledge cycles. Serial I/O is routed through the Z85C30 SCC to rear P2 I/O pins or front-panel DB-9 connectors. The SCSI controller connects to external storage via a 50-pin header. All power rails are monitored by an on-board supervisory circuit with reset generation.
Sourcing & Quality Verification
- Source: Konmask.com sources MVME133A-20 units from decommissioned industrial systems, certified refurbishers, and authorized surplus channels.
- Inspection: Every board undergoes visual inspection (IPC-A-610), power-on functional test, and VMEbus loopback verification before shipment.
- Condition Grades Available: New surplus (sealed), Refurbished (tested/cleaned), As-removed (sold as-is with inspection report).
- Traceability: Date code, lot number, and inspection records provided on request.
- Warranty: 90-day functional warranty on refurbished units; 30-day on as-removed units.
- Counterfeit Mitigation: All units verified against Motorola reference markings; suspect units are quarantined and not listed.
Procurement Process
- Confirm Requirement: Verify your chassis slot count, VMEbus revision (VME32/VME64), and OS/BSP compatibility with MVME133A-20.
- Request Quote: Contact [email protected] for volume pricing, condition grade selection, and lead time confirmation.
- Order & Payment: Purchase order, wire transfer, PayPal, and major credit cards accepted. Export compliance documentation provided for international orders.
- Shipping: Ships within 1–3 business days. ESD-safe packaging with anti-static bag, foam insert, and outer carton. DHL / FedEx / UPS international express available.
- Incoming Inspection: We recommend incoming functional test in target chassis before system integration.
Technical FAQ
Q: Is the MVME133A-20 compatible with VME64 backplanes?
A: Yes, the MVME133A-20 is backward compatible with VME64 backplanes operating in VME32 mode. Full VME64 extended features are not supported.
Q: Which BSP is available for VxWorks?
A: Wind River provides BSP support for the MVME133 family under VxWorks 5.x. Contact Konmask for BSP documentation links.
Q: Can I upgrade the RAM beyond 4 MB?
A: RAM capacity is fixed by the on-board SIMM/DRAM configuration. Some board revisions support up to 16 MB — confirm your board revision before ordering additional memory.
Q: Do you provide a test report with the board?
A: Yes. A functional test report is included with all refurbished units. As-removed units include an inspection checklist.
Q: What is the lead time for bulk orders (5+ units)?
A: Typical lead time is 5–10 business days for quantities up to 10 units. Contact us for larger volume commitments.
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