Activation control for an automotive electronic module

Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile

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3404255, 364707, 39575005, G06F 132

Patent

active

059457457

ABSTRACT:
A detector and battery switch control energy flow from a battery in a vehicle to an electronic module. The vehicle ignition switch controls battery energy flow when the ignition switch is on and the detector and battery switch control battery energy flow when the ignition switch is off. A dimming circuit provides a dimming signal when a demand for energy is made, such as when the headlights are turned on with the ignition switch turned off. The detector senses the dimming signal and operates a battery switch to power up a microprocessor controller from an unpowered state to control operation of the module when the demand for energy is made. There is no sleep mode. A response is made directly to the demand for energy and there is no battery power used until a demand is made for battery energy.

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