Car-mounted memory card interface short-circuit protection device

A memory card interface and short-circuit protection technology, applied in the field of vehicle-mounted memory card interface short-circuit protection devices, can solve problems such as memory card damage, device damage, and the whole machine cannot work normally, and achieve the effect of ensuring safety and avoiding irreversible damage.

Inactive Publication Date: 2015-03-25
JIANGSU TIANAN SMART SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during use, the memory card may be pulled out or inserted, or the memory card itself may be damaged, which may cause a short circuit of the power supply at the memory card interface.
In general, the power supply of the memory card interface adopts 3.3V and is powered by the machine. Therefore, the short circuit of the power supply caused by the above may directly lead to the failure of the whole machine or damage to other components.

Method used

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  • Car-mounted memory card interface short-circuit protection device

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Embodiment Construction

[0019] The present invention will be described in further detail below according to the drawings and embodiments.

[0020] Such as figure 1 As shown, a vehicle-mounted memory card interface short-circuit protection device according to an embodiment of the present invention includes a memory card interface seat, and the memory card interface seat includes a power supply pin and an insertion detection pin;

[0021] The power supply pin is connected to a power supply through a PTC overcurrent protection resistor, and the insertion detection pin is connected to a micro control unit.

[0022] In the above-mentioned embodiment, by setting the PTC overcurrent protection resistor, when the power supply short circuit moment occurs at the memory card interface, when the current increases, the overcurrent protection resistor takes effect, cuts off the power supply, and inserts the detection pin to connect with the micro control unit to detect in real time whether there is When the memor...

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Abstract

The invention relates to a car-mounted memory card interface short-circuit protection device. The car-mounted memory card interface short-circuit protection device comprises a memory card interface seat, wherein the memory card interface seat comprises a power supply pin and an insertion detection pin; the power supply pin is connected to a power supply through a PTC overcurrent protection resistor, and the insertion detection pin is connected with a micro-control unit. By adopting the car-mounted memory card interface short-circuit protection device, the 3.3V power supply of the memory card interface to the memory card can be cut off rapidly in power supply short circuit, so that devices in the machine can be prevented from being damaged, the power supply can be automatically and rapidly restored after the short circuit is eliminated, the entire car-mounted system is safe and stable to operate, the safety of the devices in the machine can be guaranteed, and the irreversible damage of the devices in the machine caused by the short-circuit accident can be avoided.

Description

technical field [0001] The invention relates to the technical field of a vehicle-mounted terminal connected to a vehicle-mounted memory card, in particular to a short-circuit protection device for a vehicle-mounted memory card interface. Background technique [0002] Existing vehicle-mounted terminals generally have external memory cards, especially TF cards, for media playback or map storage. However, during use, the memory card may be pulled out or inserted, or the memory card itself may be damaged, which may cause a short circuit of the power supply at the memory card interface. And because under normal circumstances, the power supply of the memory card interface adopts 3.3V and is powered by the machine, therefore, the short circuit of the power supply caused by the above may directly lead to the failure of the whole machine or damage to other components. [0003] Therefore, if a kind of vehicle-mounted memory card interface short-circuit protection device can be design...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11C7/10
Inventor 罗洪郎继军徐淑萍
Owner JIANGSU TIANAN SMART SCI & TECH
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