| 摘要 |
PROBLEM TO BE SOLVED: To suppress reset of a microcomputer due to temporary voltage reduction without using a booster circuit in an electronic control apparatus for supplying first voltage also to an external apparatus.SOLUTION: An electronic control apparatus 10 includes: a microcomputer 14 for receiving supply of first voltage and performing predetermined processing on the basis of an output from an external apparatus 52; a first connection line 16 fur supplying the first voltage to the microcomputer; a capacitor 18 connected between the first connection line and ground; a reset circuit 20 for resetting the microcomputer when the first voltage is turned to a reference value or less; a voltage detection circuit 22 for detecting second voltage supplied from an external power supply 50; a second connection line 24 for supplying the first voltage to the external apparatus; and a switch 26 arranged on the second connection line, allowed to be turned to an open state for interrupting the supply of the first voltage to the external apparatus in at least a part of a period in which the second voltage is a predetermined value or less and allowed to be turned to a close state in a period excluding the open state. The microcomputer does not perform the predetermined processing during a period in which the switch is in the open state. |
