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Power supply power-fail method of auto sound singlechip and peripheral circuit equipment

A technology for peripheral circuits and power failures, applied in the field of car audio, can solve problems such as lack of guidance, and achieve the effect of shortening the required number of times

Inactive Publication Date: 2010-08-11
HUIZHOU DESAY SV AUTOMOTIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a power-off method for a car audio single-chip microcomputer and peripheral circuit equipment to solve the technical problem in the prior art that lacks guidance for passing power pulse experiments

Method used

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  • Power supply power-fail method of auto sound singlechip and peripheral circuit equipment
  • Power supply power-fail method of auto sound singlechip and peripheral circuit equipment
  • Power supply power-fail method of auto sound singlechip and peripheral circuit equipment

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as figure 1 As shown, the power-off method of the present invention divides the car stereo into three stages in the power-off time: high-frequency power-down stage (T1), low-frequency power-down stage (T2), reset power-off stage (after T2) .

[0019] 1. High-frequency power-off stage (T1): In this stage, the single-chip microcomputer is still in the high-frequency working state, and the peripheral equipment consumes a lot of power.

[0020] 2. Low-frequency power-off stage (T2): At this stage, the audio is turned off, the single-chip microcomputer is in a low-frequency working state, the peripheral equipment has stopped working, and the power consumption is small.

[0021] 3. Reset power-down stage (after T2): In this stage, the single-chip microcomputer is in an abnormal working state.

[0022] Wherein, the time T1 of ...

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Abstract

The invention relates to the technical field of auto sound, in particular to a power supply power-fail method of auto sound singlechip and peripheral circuit equipment, comprising a high-frequency power-fail stage which controls the power failure of singlechip high-frequency crystal oscillator and a low-frequency power-fail stage which controls the power failure of singlechip low-frequency crystal oscillator, wherein the high-frequency power-fail time is less than the low-frequency power-fail time. The invention builds a power-fail curve model, uses a time slot to specifically divide the model and gives the qualitative relationship of each stage in the power-fail curve model under the control of hardware. A mathematical model can be applied in all auto sound development and can shorten power supply pulse experiment times of the auto sound.

Description

technical field [0001] The invention relates to the technical field of car audio, in particular to a power-off method for a car audio single-chip microcomputer and peripheral circuit equipment. Background technique [0002] Car audio designers often spend a lot of time and energy on how to pass the power pulse experiment, how to quickly and effectively pass the power pulse experiment to save costs is a challenge for car audio designers, and there is currently no model that can reveal Relationship between power-down curve and software and hardware. Contents of the invention [0003] The invention provides a power supply power-off method for a car audio single-chip microcomputer and peripheral circuit equipment to solve the technical problem in the prior art that there is no guidance for passing power pulse experiments. [0004] The technical scheme that the present invention adopts is as follows: [0005] A power-off method for car audio single-chip microcomputer and peri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/40
Inventor 方加强王满红
Owner HUIZHOU DESAY SV AUTOMOTIVE