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四、几种工作方式: SCC的功能可以从两个不同的角度来描述,在当做数据通讯设备时,它从数据通讯协议的宽度和变量来发送和接收数据。在当做处理机外设时它同CPU相对话並提供向量中断及交换信号。SCC提供编程使用任何公共异步或同步数据通讯协议的两个独立的全双工通道。它们可以分别在异步方式,同步方式,SDLC循环方式下工作。异步方式: SCC每个通道能独立地以每个字符5—8位,加上奇偶校验完成发送和接收数据。发送器能支持每个字符1位,1 1/2,2位停止位及在任何时候提供返回输出,接收器断点总测逻辑在
Fourth, several ways of working: SCC function can be described from two different perspectives, as a data communications equipment, it is from the width of the data communication protocol and variables to send and receive data. When it comes to processor peripherals it talks to the CPU and provides vector interrupts and exchange of signals. The SCC provides two independent full-duplex channels programmed to use any common asynchronous or synchronous data communication protocol. They can work in asynchronous mode, synchronous mode, SDLC loop mode. Asynchronous mode: SCC Each channel can independently 5-8 bits per character, plus the parity to complete the sending and receiving data. The transmitter can support 1 bit per character, 1 1/2, 2 stop bits and provide return output at any time. The receiver breakpoint total logic