Option protection circuit for burn microcontroller

A microcontroller and protection circuit technology, applied in the direction of program control devices, instruments, static memory, etc., can solve the problem of option confusion, achieve the effect of solving option confusion, increasing performance and noise tolerance

Inactive Publication Date: 2010-03-17
HOLTEK SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention proposes an option protection circuit for programming microcontrollers, the main purpose of which is to solve the problem of disordered options of microcontrollers caused by external noise interference

Method used

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  • Option protection circuit for burn microcontroller
  • Option protection circuit for burn microcontroller
  • Option protection circuit for burn microcontroller

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Embodiment Construction

[0069] In order to have a further understanding of the purpose, structure, features, and functions of the present invention, it will be described in detail below with reference to the accompanying drawings and examples, but the following drawings and examples are only for auxiliary illustrations, and the present invention is not limited to the accompanying drawings and examples.

[0070] figure 1 For the preferred specific embodiment of the option protection circuit for the programming microcontroller of the present invention, please refer to figure 1, the option protection circuit 1 for programming microcontroller of the present invention includes: an option download unit 2, which receives a heavy load write signal wr-reload, a re-download signal re-download, and a take-out address Signal load-address and a pre-stored data signal pre-data, and generate a first data signal B, a temporary store data signal reg-data, a plurality of option data signals option-data and an address...

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Abstract

The invention discloses an option protection circuit for a burn microcontroller, which comprises an option downloading unit, an option prestoring unit and an error detection and data recovery generation unit. Thus, the microcontroller can ensure the accuracy of each option during working, so that users can use the option protection circuit to achieve an effect of an option error detection and recovery mechanism. Meanwhile, due to the characteristics, the problem of option errors caused by interferences of outside noises of the microcontroller is solved and the performance and noise tolerance of the microcontroller are improved.

Description

technical field [0001] The invention relates to an option protection circuit for a programming microcontroller, in particular to an option protection circuit capable of realizing the effect of option error detection and recovery mechanism. Background technique [0002] For one-time or multiple-programmable microcontrollers (OTP Type MCU), the option ROM (Option ROM) download will only occur after the power is turned on and before the microcontroller actually starts to work, when the microcontroller When starting to work, if there is unknown and powerful noise (such as EMI or ESD) that interferes with the work of the microcontroller, and the microcontroller itself has poor anti-noise ability, it is likely that the Option (Option) The value of the value changes (from 0→1 or from 1→0), causing the original output port (Port) to be a CMOS type (Type) output, and the output port is an NMOS type (Type) output, so that , the output port does not function as expected by the user. ...

Claims

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Application Information

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IPC IPC(8): G06F11/00G06F9/445G11C17/00G11C16/10
Inventor胡闵雄林春安
OwnerHOLTEK SEMICON