Electrical control unit for an automobile
First Claim
Patent Images
1. An electrical control unit for an automobile comprising:
- a microcomputer which controls equipment installed in automobilean input circuit which passes an electric signal from the outside to said microcomputer;
a driver circuit which outputs the electric signal output from said microcomputer outside; and
a power supply circuit which supplies power supply to said microcomputer,whereinsaid power supply circuit is conflaured to receive a wake-up signal from the outside, and begin supplying power to the microcomputer, andsaid microcomputer is awakened by the stating of the supplying of power from the power supply.
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Accused Products
Abstract
An electrical control unit for an automobile of which standby current is smaller. In an electrical control unit for an automobile having a microcomputer, an input circuit, a driver circuit, and a power supply circuit, which is started by a wake-up signal from the circuit other than the ignition switch even when the ignition switch of the automobile is cut off, the microcomputer is started by shifting the power supply circuit from an inert state to an active state to generate the voltage for operating the microcomputer, and the predetermined processing is executed.
55 Citations
28 Claims
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1. An electrical control unit for an automobile comprising:
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a microcomputer which controls equipment installed in automobile an input circuit which passes an electric signal from the outside to said microcomputer; a driver circuit which outputs the electric signal output from said microcomputer outside; and a power supply circuit which supplies power supply to said microcomputer, wherein said power supply circuit is conflaured to receive a wake-up signal from the outside, and begin supplying power to the microcomputer, and said microcomputer is awakened by the stating of the supplying of power from the power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 12, 13, 15, 17, 18)
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9. An electrical control unit for an automobile comprising:
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a microcomputer which controls equipment installed in automobile an input circuit which passes an electric signal from the outside to said microcomputer, a driver circuit which outputs the electric signal output from said microcomputer outside, and a power supply circuit which supplies power supply to said microcomputer, wherein said power supply circuit is conflaured to receive a wake-up signal from the outside, and to begin supplying power to the microcomputer, and said microcomputer is awakened by the stating of the supplying of power from the power supply circuit; and
wherein said power supply circuit comprises;a first regulator which generates the voltage to operate said microcomputer by inputting said ignition switch signal or said wake-up signal, a second regulator which operates even when said ignition switch is cut off, an OR circuit activating said first regulator by using either the ignition switch signal or one of said plural wake-up signals, a start factor determining means to distinguish whether said first regulator is activated by which signal of the ignition switch signal and one of plural wake-up signals, a communication device to transmit the start factor determined by said start factor determining device. - View Dependent Claims (10, 11, 14, 16, 19, 20, 21, 22)
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23. An electrical control unit for an automobile comprising:
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a microcomputer which controls equipment installed in automobile, an input circuit Which passes an electric signal from the outside to said microcomputer, an output circuit, for outputting an electric signal output from said microcomputer, and a power supply circuit which supplies power supply to said microcomputer, wherein said power supply circuit is a semiconductor IC configured to receive a wake-up signal from the outside, and to begin supplying power to the microcomputer, and said microcomputer is awakened by the stating of the supplying of power from the power supply circuit. - View Dependent Claims (24, 25, 26, 27, 28)
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Specification