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Key Technical Specifications
- Processor: MPC604 PowerPC
- CPU Speed: 300 MHz
- Memory: ECC-protected DRAM, up to 128 MB
- Cache: On-chip L1 cache, dependent on CPU variant
- Flash: On-board Flash, model-dependent
- Expansion: 2 PMC slots
- Ethernet: 10/100 Mb/s auto-negotiate
- VME Interface: A32/D32/BLT64 master/slave support
- System Controller: Supported
- Form Factor: 6U VMEbus processor module
Product Introduction
Motorola MVME2308 is a 6U VME processor module in the MVME2300 family, built around a 300 MHz MPC604 PowerPC CPU. It is used in legacy industrial control, test systems, and OEM VME racks that need a higher-performance Motorola PowerPC board without changing the overall system architecture.
This module fits where Ethernet, PMC expansion, and ECC memory matter. In field replacements, the main goal is keeping the existing VME software stack and I/O structure intact while matching the original board’s bus behavior and configuration.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No LEDs on power-up | Rack power issue, not module failure | ❌ Low | Measure +5 V, +12 V, and -12 V at the VME slot | Check PSU and backplane fuses before replacing the board |
| Boots to monitor but not application | Corrupt flash, wrong image, or config mismatch | ✅ High | Open the serial console and review boot output | Restore the correct flash image and jumper settings first |
| Ethernet link absent | Cable issue, port mismatch, or PHY fault | ✅ Medium | Check link LED and test with a known-good cable and switch port | Verify the network option and physical interface revision |
| PMC cards not detected | Bad PMC module, slot issue, or power mismatch | ✅ Medium | Reseat the PMC and confirm slot power and connector seating | Check PMC type, I/O routing, and power budget |
| Random resets after warm-up | Thermal stress, weak power rail, or aging components | ✅ Medium | Measure rail ripple and monitor board temperature under load | Inspect cooling and supply stability before hardware swap |
| Serial console shows garbled text | Baud rate or terminal setting mismatch | ✅ Medium | Verify baud, parity, and stop bits against the original board | Match the site’s original console settings exactly |
Contact technical support with photos of the board, jumper positions, console output, and rack details if the fault is still unclear.
- MVME2308
- MVME2308
Frequently Asked Questions
Q: Is MVME2308 a direct replacement for every MVME2300 board?
A: No. It is a specific high-end configuration in the MVME2300 family, and compatibility depends on CPU option, memory size, PMC layout, and firmware expectations. Match the exact suffix and board revision before ordering.
Q: Can I hot-swap this board?
A: No. Power down the rack first. Pulling a legacy VME CPU board live can stress the backplane and corrupt attached hardware.
Q: Will my existing software run on it?
A: Usually yes if the boot image, memory map, serial settings, and PMC hardware match the old board. The main risk is configuration drift, not the processor itself.
Q: Why is this cheaper than factory-new hardware?
A: Because MVME2308 is an obsolete legacy part. Most units available today are surplus, pulled from service, or refurbished, so pricing reflects availability and test status rather than current production.
Q: What condition should I expect?
A: Most sellers list it as New Surplus or Refurbished and tested. Ask for actual board photos, the serial number, and a test report before you buy.
Q: What are the common failure points?
A: Aging capacitors, flash corruption, battery-backed settings loss, and power or jumper mismatch. In the field, many “bad board” calls turn out to be setup issues.
Q: What warranty is realistic for a board like this?
A: Limited warranty is normal for surplus industrial electronics, often 30 to 365 days depending on seller policy and test depth. Get the warranty terms in writing before purchase.
