JPS5531383A - Terminal data collection method - Google Patents

Abstract

PURPOSE: To make the collection device of the center simple constitution by transmitting the timing synchronizing signal for sending out data from the center to the terminal and performing data transmission in accordance with the aforesaid synchronizing signal on the part of the terminal.

CONSTITUTION: The data signals from the terminal keyboard equipments 11a∼11g are stored in the latch circuit as information of "g" bits through the level conversion circuit 13. In this case, g means the number of bits of 1 group of the terminal keyboard equipment. The data of g bits mentioned above are stored in the buffer unit 17 after the control information of k+1 bits has been applied. These data are read in the processing unit 19, and subsequently are transmitted to the control unit 20 after judging a character and checking an error concerning the data of each terminal. The terminal keyboard is divided into groups whose number is n, and g bits of the keyboard data are loaded simultaneously to 1 group each. The synchronizing signal generation circuit 18 generates the timing signal of data transmission and loading for each key group, and the synchronizing signal of 1 group to each keyboard equipment is transmitted through the level conversion circuits 13, 14, as the same signal.

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