High performance communication controller

一种通信控制器，用于处理高速多协议数据流，其中数据流由帧组成。通信控制器具有两个处理器，第二处理器初始化第一处理器并处理高级管理和协议功能，第一处理器处理数据流事务。第一和第二处理器与两条外部总线相连。第一处理器通过执行任务而处理帧的事务。如果第一处理器确实处理了一整个帧，或者如果需要从通信信道提取帧的一部分，当需要从与第一或第二外部总线相连的外部单元提取信息时，第一处理器便执行任务转换。 A communication controller for handling high speed multi protocol data streams, wherein a stream is comprised of frames. Communication controller has two processors, second processor initializes first processor and handles high level management and protocol functions, first processor handles the data stream transactions. First processor and second processors are coupled to a two external buses. First processor handles a transactions of a frame by executing a task. First processor performs a task switch when there is a need to fetch information from an external unit, coupled to either first or second external bus, if it did process a whole frame, or if there is a need to fetch a portion of a frame from a communication channel.