Motorola  MVME147-022 控制器模块

1.产 品 资 料 介 绍：

Motorola MVME147-022 VMEbus 控制器模块解析

一、核心技术特性

1. 68030 架构的实时运算能力

• 处理器核心：搭载 Motorola MC68030 工业级 CPU，主频典型值 25 MHz，集成 256B 指令缓存 + 256B 数据缓存，支持 32 位地址 / 数据总线，具备虚拟内存管理单元（MMU）：
  • 可高效运行实时控制算法（如 PID 调节、逻辑联锁），单指令周期内完成基础运算，满足工业设备 “毫秒级响应” 需求；
  • 可选配 MC68882 浮点协处理器，强化浮点运算能力（如电力参数计算、雷达信号预处理），避免无协处理器时的软件模拟浮点导致的性能损耗。
• 存储配置：
  • DRAM 内存：标配 4 MB，最大可扩展至 16 MB，支持奇偶校验（部分版本），保障数据读写准确性，满足多任务运行时的临时数据缓存需求；
  • 固化存储：板载 EPROM/Flash（典型容量 128 KB–1 MB），用于存储引导程序（如 147Bug 监控固件）、操作系统内核与基础驱动，断电后程序不丢失，支持系统上电自动启动。

2. VME 总线系统控制器功能

• 总线仲裁：支持优先级仲裁（PRI）与循环仲裁（RR）两种模式，可管理最多 7 个外部 VME 主模块（如其他处理器板、通信模块），根据任务紧急度分配总线使用权（如将 “设备故障保护” 指令设为最高优先级），避免总线冲突；
• 中断管理：集成 VME 中断控制器，支持 7 级中断优先级，可接收从模块（如 I/O 板、存储模块）的中断请求，按优先级调度 CPU 响应，保障高紧急度事件（如传感器超限告警）优先处理；
• 主从双模：既能作为 VME 主模块主动发起总线事务（如读取 I/O 数据、写入控制指令），也能作为从模块接收其他主模块的访问（如共享内存数据交互），灵活适配多主协同的复杂系统。

Motorola MVME147-014 单板计算机 英文资料：

Analysis of Motorola MVME147-022 VMEbus Controller Module

The Motorola MVME147-022 is a classic VMEbus controller module in the MVME147 series, essentially a highly integrated 32-bit embedded single board computer (SBC). Its core positioning is the "dual role hub" of the VME system - serving as the central processing unit (CPU) responsible for real-time computing and multitasking scheduling, as well as the VME bus system controller function, responsible for bus arbitration, interrupt management, and resource allocation, adapting to scenarios such as industry, power, and national defense that require strict "reliability+real-time+bus control capabilities". It is the core component for building independent control units in early VME architecture systems.

1、 Core technical characteristics

1. Real time computing capability of 68030 architecture

Processor core: Equipped with Motorola MC68030 industrial grade CPU, with a typical clock frequency of 25 MHz, integrated 256B instruction cache and 256B data cache, supporting 32-bit address/data bus, and equipped with virtual memory management unit (MMU):

Can efficiently run real-time control algorithms (such as PID regulation and logic interlocking), complete basic operations within a single instruction cycle, and meet the "millisecond level response" requirements of industrial equipment;

Optional MC68882 floating-point coprocessor can be used to enhance floating-point computing capabilities (such as power parameter calculation and radar signal preprocessing), avoiding performance loss caused by software simulation of floating-point without a coprocessor.

Storage configuration:

DRAM memory: comes standard with 4 MB, expandable up to 16 MB, supports parity check (some versions), ensures data read and write accuracy, and meets temporary data caching requirements during multitasking;

Solid state storage: onboard EPROM/Flash (typical capacity 128 KB-1 MB), used to store boot programs (such as 147Bug monitoring firmware), operating system kernels, and basic drivers. Programs are not lost after power failure, and the system supports automatic startup when powered on.

2. Function of VME bus system controller

As the core differentiation feature of MVME147-022, its integrated "VME System Controller" function can directly manage VME bus resources without the need for additional bus arbitration modules:

Bus arbitration: Supports priority arbitration (PRI) and loop arbitration (RR) modes, can manage up to 7 external VME main modules (such as other processor boards and communication modules), allocate bus usage rights based on task urgency (such as setting the "device fault protection" instruction to the highest priority), and avoid bus conflicts;

Interrupt management: Integrated VME interrupt controller, supports 7-level interrupt priority, can receive interrupt requests from modules (such as I/O boards, storage modules), schedule CPU responses according to priority, and ensure priority processing of high emergency events (such as sensor overload alarms);

 Motorola MVME147-014 单板计算机  产      品      展      示      

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