Method of delayed turn-off after ignition shutdown of car-mounted equipment
A vehicle-mounted device, closed technology, applied to vehicle components, circuits or fluid pipelines, transportation and packaging, etc., can solve problems such as damage to memory chips, failure to meet storage requirements, etc., achieve the use of fewer components and delay the power-off time of equipment , the effect of avoiding the risk of equipment damage
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[0017] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0018] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0019] A method for delaying shutdown after ignition of a vehicle-mounted device is turned off, the specific process is as follows:
[0020] 1. In the initial state, when the ignition (ACC) power supply is out of power, the system does not work, and the subsequent stage has no output;
[0021] 2. When the car is started, the ignition (ACC) power supply has power, wakes up the system, and supplies power to the subsequent equipment. At the same time, the MCU outputs an output signal, which will be logically or processed with the ignition (ACC) power supply to generate a control signal input To the switch and voltage conversion circuit to ensure the normal operation of the system, that is,...
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