IC693BEM331M  | 总线控制器 |  总线的连接与协议转换

IC693BEM331M  GE Fanuc

I/O 总线 / Genius 总线控制器

IC693BEM331M 总线控制器是总线系统的核心，其主要任务是管理总线的使用，包括总线上设备的管理和设备使用总线的过程管理 。

总线控制器在逻辑上是一个概念，并不一定存在一个独立的物理控制器，其功能可能分布到总线的各个部件或者设备上 。

IC693BEM331M 总线控制器的主要功能包括：

总线系统资源的管理：IC693BEM331M 总线系统的资源主要有存储空间、设备端口空间、通道、中断等。总线控制器需要对这些资源进行分配，解决资源冲突，并对设备进行选择、启动和复位等操作1。

IC693BEM331M 总线的定时控制：无论是同步总线还是异步总线，系统都需要定时控制。这涉及到产生总线命令和标识信号，协调设备的工作过程，辅助总线仲裁器工作，以及控制设备占用总线的时间等。

总线的仲裁：当多个设备同时请求使用总线时，总线控制器需要进行仲裁，确定哪个设备可以优先获得总线使用权。

总线的连接与协议转换：对于系统中存在多种总线的情况，总线控制器需要完成不同总线协议之间的转换；对于有多条总线的系统，总线控制器还需要完成这些总线之间的连接。

总线控制器在多种总线标准和系统中都有应用，例如ISA总线、MCA总线、EISA总线等，它们都是计算机系统中的标准总线，而总线控制器则负责管理和协调这些总线的使用。

IC693BEM331M  GE Fanuc

I/O bus/Genius bus controller

The IC693BEM331M bus controller is the core of the bus system, its main task is to manage the use of the bus, including the management of the device on the bus and the process management of the device using the bus.

The bus controller is a concept in logic, and there is not necessarily an independent physical controller, whose functions may be distributed to various parts of the bus or devices.

The main functions of the IC693BEM331M bus controller include:

Management of bus system resources: The resources of the IC693BEM331M bus system mainly include storage space, device port space, channels, interrupts, etc. The bus controller needs to allocate these resources, resolve resource conflicts, and select, start, and reset devices.

Timing control of IC693BEM331M bus: Whether it is a synchronous bus or an asynchronous bus, the system needs timing control. This involves generating bus commands and identification signals, coordinating the work process of the device, assisting the work of the bus arbitrator, and controlling the time that the device occupies the bus.

Bus arbitration: When multiple devices request to use the bus at the same time, the bus controller needs to arbitrate to determine which device can get the bus first.

Bus connection and protocol conversion: For the case of multiple buses in the system, the bus controller needs to complete the conversion between different bus protocols; For systems with multiple buses, the bus controller also needs to complete the connection between these buss1.

Bus controllers are used in a variety of bus standards and systems, such as ISA bus, MCA bus, EISA bus, etc. They are all standard buses in computer systems, and the bus controller is responsible for managing and coordinating the use of these busses.1