Fail safe code functionality

A security code and code technology, applied in the field of fail-safe code functions, can solve problems such as the inability to execute application code safely

Active Publication Date: 2014-05-21
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In case an uncorrectable bit error within the application code stored within the NVM has been detected by the ECC mechanism, the application code cannot be safely executed

Method used

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  • Fail safe code functionality
  • Fail safe code functionality
  • Fail safe code functionality

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Embodiment Construction

[0014] The description herein proceeds with reference to the drawings, wherein like reference numerals are generally utilized to refer to like elements throughout, and wherein various structures are not necessarily drawn to scale. In the following description, for purposes of explanation, numerous specific details are set forth in order to facilitate understanding. It will be apparent, however, to one of ordinary skill in the art that one or more aspects described herein may be practiced with a lesser degree of these specific details. In other instances, well-known structures and devices are shown in block diagram form to facilitate understanding.

[0015] figure 1 A system 100 is illustrated that includes an integrated chip (IC) 102, a microcontroller (μC) 104, and a first storage device 106 that further includes non-volatile memory (NVM), such as flash fast memory, electrically erasable programmable read-only memory (EEPROM), or magnetic memory. The first storage device 1...

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Abstract

Some aspects of the present disclosure provide for a system and method for fault mitigation of a non-volatile memory (NVM) store subject to error correction code (ECC) checking. A simple and robust means to test the integrity of failsafe code stored within the non-volatile memory prior to execution are disclosed. In some embodiments, the failsafe code comprises program elements to communicate the memory failure to other parts of the system, or to execute an orderly shutdown. In the event that an ECC error occurs, the failsafe code can be verified, and upon successful verification, executed.

Description

technical field [0001] The present invention relates to fail-safe code functions. Background technique [0002] In the prior art regarding non-volatile memory (NVM), data bit corruption is common. An error correction code (ECC) mechanism is incorporated in order to detect and correct data bit errors within application code accessed via NVM. The ECC mechanism can detect and correct all single-bit errors and detect some multiple-bit errors. In case an uncorrectable bit error within the application code stored within the NVM has been detected by the ECC mechanism, the application code cannot be safely executed. Contents of the invention [0003] According to an aspect of the present invention, there is provided a method for fail-safe protection in a system, comprising: when retrieving application code from a first storage device, utilizing a first corruption detection and correction mechanism for corruption verification of application code stored in said first storage devi...

Claims

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Application Information

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IPC IPC(8): G06F21/60
CPCG06F11/1076G06F11/1004G06F11/07G06F11/08
Inventor T.朗格T.莱门泽D.I.佩纳鲁
Owner INFINEON TECH AG
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