Motorola MVME-327A總線適配器 

1.產(chǎn) 品 資 料 介 紹：

Motorola MVME-327A VMEbus 總線適配器解析

一、核心技術(shù)特性

1. VME 總線全兼容與協(xié)議適配

• 多版本總線支持：完全兼容 VMEbus 標準（包括傳統(tǒng) 32 位 VME、VME64 擴展標準），可適配不同世代的 VME 模塊：
  • 支持 16 位 / 32 位 / 64 位數(shù)據(jù)傳輸模式自動切換，解決早期 32 位處理器板（如 MVME162）與新一代 64 位 I/O 模塊的總線帶寬不匹配問題；
  • 兼容 VME 主模塊（如 MVME2301 控制器）的地址映射、中斷響應與 DMA 傳輸協(xié)議，確保主從模塊間指令與數(shù)據(jù)交互無協(xié)議障礙，避免總線沖突。
• 總線信號調(diào)理：內(nèi)置信號整形與驅(qū)動電路，補償 VME 背板長距離傳輸導致的信號衰減（尤其適配多槽位機箱），提升總線傳輸速率（最高支持 VME64 標準的 80MB/s 峰值帶寬），保障大容量數(shù)據(jù)（如工業(yè)相機圖像、雷達探測數(shù)據(jù)）傳輸?shù)膶崟r性。

2. 電氣隔離與抗干擾設計

• 光電隔離保護：關(guān)鍵總線通道集成光電隔離電路（隔離電壓≥2500Vrms），阻斷 VME 系統(tǒng)中不同模塊間的共地干擾（如工業(yè)電機啟停的浪涌電流、電力設備強磁場輻射），避免高電壓 / 大電流沖擊損壞核心處理器模塊（如 MVME167 單板機）；
• 電磁兼容優(yōu)化：電路設計符合 IEC 61000-4 標準（抗靜電、抗射頻干擾），板載 EMI 濾波組件，減少適配器自身對總線信號的干擾，同時抵御外部復雜電磁環(huán)境（如車間變頻器、車載電臺）對總線通信的影響，降低數(shù)據(jù)傳輸誤碼率。

Motorola MVME 172-263以太網(wǎng)模塊英文資料：

Analysis of Motorola MVME-327A VMEbus Adapter

Motorola MVME-327A is an industrial grade bus adapter designed specifically for VME bus systems. Its core positioning is "the signal adaptation and protocol conversion hub between VME master and slave modules" - by solving the bus compatibility, signal integrity, and electrical isolation problems between different VME modules (such as processor boards, I/O modules, and communication modules), it achieves efficient collaboration among multiple modules and expands the interface adaptation capability of VME systems. It is a key component in ensuring stable bus communication in complex VME architecture systems such as industrial automation, power energy, and national defense.

1、 Core technical characteristics

1. VME bus full compatibility and protocol adaptation

Multi version bus support: fully compatible with the VMEbus standard (including traditional 32-bit VME and VME64 expansion standards), adaptable to different generations of VME modules:

Support automatic switching between 16 bit/32-bit/64 bit data transfer modes, solving the problem of mismatched bus bandwidth between early 32-bit processor boards (such as MVME162) and the new generation of 64 bit I/O modules;

Compatible with the address mapping, interrupt response, and DMA transfer protocol of VME master modules (such as MVME2301 controller), ensuring no protocol barriers in instruction and data exchange between master and slave modules, and avoiding bus conflicts.

Bus signal conditioning: Built in signal shaping and driving circuits, compensating for signal attenuation caused by long-distance transmission of VME backboards (especially suitable for multi slot chassis), improving bus transmission speed (supporting up to 80MB/s peak bandwidth of VME64 standard), and ensuring real-time transmission of large capacity data (such as industrial camera images and radar detection data).

2. Electrical isolation and anti-interference design

Optoelectronic isolation protection: Key bus channels are integrated with optoelectronic isolation circuits (isolation voltage ≥ 2500Vrms) to block common ground interference between different modules in the VME system (such as surge currents from industrial motor start stop and strong magnetic field radiation from power equipment), avoiding high voltage/high current impact damage to core processor modules (such as MVME167 single board computer);

Electromagnetic compatibility optimization: The circuit design complies with the IEC 61000-4 standard (anti-static, anti radio frequency interference), and the onboard EMI filtering component reduces the interference of the adapter itself on the bus signal, while resisting the influence of external complex electromagnetic environments (such as workshop frequency converters and car radios) on bus communication, reducing data transmission error rates.

Motorola MVME 172-263以太網(wǎng)模塊產(chǎn)      品      展      示      

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