| 摘要 |
<p>PURPOSE:To prevent an increase in the number of pins of a connector by transmitting an address command and an output command for each kind of electronic equipment from a control unit, and transmitting to electronic equipment corresponding to the address command a driving output corresponding to the output value command so as to control the electronic equipment from the side of a driving step unit. CONSTITUTION:A control unit 1 is connected to a driving step unit 2 via a time-sharing communication means 3 consisting of transmitting and receiving wires TX, RX for transmitting both an address command and an output value command corresponding to each kind of electronic equipment from the control unit 1 in shared time, and a clock signal wire CLK. An extended control means for receiving a command and varying driving output to electronic equipment that corresponds to the command is provided to the driving step unit 2 and receives transmitted commands and judges addresses and the output of a branch output port corresponding to a command is reversed according to judgement by the means. A number of kinds of electronic equipment are thus driven simply by connection of the control unit 1 and the driving step unit 2 to each other through a few of communication wires.</p> |
