TRANSMISSION EQUIPMENT FOR FULL DUPLEX DATA

摘要

PURPOSE:To relieve the load of the CPU and to improve the data transmission speed by providing a RAM and a control section independently respectively to a transmission section and reception section. CONSTITUTION:A transmission controller 35 of a transmission section outputs a clock R-CLK to a transmission RAM 50 and a reception controller 48 of a reception section gives a control signal to a driver 52 to make the input/output of the driver conductive and to cut off the input/output of a receiver 54. The R-CLK is fed to a reception RAM 53 at the same time to read the data stored in the RAM 53 and the data is written in a storage device in the CPU. The CPU compares the data number of a reception counter 44 and the readout data number and finishes the readout and the write into the storage device in the CPU when they are coincident. When the transmission section completes the transmission of the transmission data from the RAM 40 to the opposite party, the reception section starts the reception of the data transmitted from the opposite party again and the transmission starts writing the data to be transmitted to the opposite party into the RAM 40.