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Secondary reset circuit and reset method

A technology for resetting circuits and resetting chips, which is applied to electrical components, electronic switches, pulse technology, etc., and can solve problems such as reset failure, chip failure, and different reset signal pulse requirements

Active Publication Date: 2016-02-10
中科可控信息产业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since a reset has no falling edge, a reset will be invalid
The reset signal of the second reset has a falling edge, so it must be reset twice to enter the reset state
[0003] Moreover, different chips may have different requirements for the pulse of the reset signal, and the level of the reset signal changes from low to high at the moment of power-on.
This kind of reset signal may be invalid for some chips, and when there is an individual bug in the chip itself, this reset will also be invalid

Method used

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Embodiment Construction

[0024] In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all implementations. Exhaustive list of examples.

[0025] The reset pulse of the secondary reset circuit of the present invention is the same as the manual reset pulse, and has two signal edges. Designing a power-on secondary reset circuit in the reset circuit can avoid the situation that the chip cannot work normally due to the failure of the chip once reset.

[0026] Describe below in conjunction with a specific application scenario the secondary reset circuit according to the present invention, promptly utilize the secondary reset circuit of the present invention to reset the BMC (Baseboard Management Controller, mainboard management controll...

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Abstract

The invention provides a secondary reset circuit and method of a chip. The reset circuit is designed into a power-on secondary reset circuit with two signal edges on reset pulse, so that the conditions that the chip cannot work normally due to failure of the chip caused by once resetting can be prevented. By means of the secondary reset circuit and method, secondary resetting can be achieved, and individuation requirements on different chips can be met flexibly.

Description

technical field [0001] The invention relates to a chip secondary reset circuit and a reset method. Background technique [0002] Generally, the chip needs a power-on reset circuit to reset the chip at the moment of power-on, so as to complete the initialization of the chip at the moment of power-on. The most common power-on reset circuit is the RC charging circuit. After power-on, the voltage across the capacitor C needs to be charged for a period of T before it can be judged to be high by the chip. Before T, the voltage across C is judged to be low, and the chip is in a reset state. This reset is called a reset reset. Under normal circumstances, the chip enters the working state after a reset, and the second reset will not be used. However, some chips have special requirements for the reset signal. For example, it is required to enter the reset state at the falling edge of the reset signal and release the reset state at the rising edge of the reset signal. Since a reset...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/22
Inventor 袁海滨张克功邵宗有沙超群郑臣明王晖
Owner 中科可控信息产业有限公司