公开(公告)号：US4377843A

公开(公告)日：1983-03-22

申请号：US31374

申请日：1979-04-19

申请人： Roy T. Garringer ,  Lacrence G. Gierut

发明人： Roy T. Garringer ,  Lacrence G. Gierut

IPC分类号： G06F13/22 ,  H04Q11/04 ,  G06F3/00

CPC分类号： H04Q11/0407 ,  G06F13/22

摘要： A microprocessor-based circuit for interfacing between a plurality of serial data terminals and an external parallel data operating system. The interface circuit includes an asynchronous receiver-transmitter, which converts serial data to parallel data and converts parallel data to serial data. The interface circuit multiplexes received serial data from the terminals and couples that serial data to the receiver-transmitter. The microprocessor in the interface circuit further controls the transfer of this now-parallel data to the external parallel data operating system. The microprocessor also controls the transfer of parallel data from the parallel data operating system, which is converted to serial data by the asynchronous receiver-transmitter, demultiplexed by the interface circuit and transmitted to the terminals. Both the transmission and the reception of serial data is coordinated by the microprocessor, which also controls the receiver-transmitter and a set of registers connected to the operating system on a parallel data bus.

摘要翻译： 一种用于在多个串行数据终端和外部并行数据操作系统之间进行接口的基于微处理器的电路。 接口电路包括异步接收机 - 发射机，其将串行数据转换为并行数据，并将并行数据转换为串行数据。 接口电路将接收到的串行数据从终端复用，并将该串行数据耦合到接收机 - 发射机。 接口电路中的微处理器进一步控制将此并行数据传输到外部并行数据操作系统。 微处理器还控制从并行数据操作系统传输并行数据，由异步接收发射机转换为串行数据，由接口电路解复用并发送到终端。 串行数据的传输和接收都由微处理器协调，微处理器也控制接收机 - 发射机和一组在并行数据总线上连接到操作系统的寄存器。