| 摘要 |
PURPOSE:To attain the high economical properties as well as miniaturization of the titled transmission device by performing the power transmission and the signal transmission/reception just with a single line. CONSTITUTION:When clocks are produced from a synchronizing signal generating part 35 after a power supply is applied, the supply of electric power is periodically started and stopped to a transmission line 33. Then the constant voltage is supplied to each part from power supply voltage holding circuits 51, 53 and 55 respectively. In the power supply stop modes generated in the prescribed order, a reception part 57, a transmission part 59 and transmission/ reception part 61 are controlled by a microcomputer so that they transmit the control data onto the line 33 between the slots of transmission and reception parts or read the data on these slots. |
