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Method and base chip for monitoring the operation of a microcontroller unit

A microcontroller, basic technology, used in hardware monitoring, non-redundancy-based fault handling, instrumentation, etc., to solve problems such as crashes

Inactive Publication Date: 2008-04-02
NXP BV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, if the recurring occurrence is a software crash or reset, the watchdog will not be able to do anything, that is, due to low voltage, at some random point in the program, the watchdog or low voltage detector resets the control unit, and Then crash or low voltage again at a later point in time at the same point in the software

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  • Method and base chip for monitoring the operation of a microcontroller unit

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Embodiment Construction

[0024] Shown schematically in Fig. 1 is the control system 100, which includes a microcontroller unit 300 with a power supply unit 310 (providing VDD supply), a reset unit 320 and an I / O (input / output) module 330, and also has a A so-called SBC (System Basis Chip) 200 for monitoring the operation of the microcontroller 300 for an application.

[0025] For this purpose, the SoC 200 has, inter alia, a non-volatile memory area 10 (= "general-purpose memory") with which it is possible to generate and store information related to the operation of the microcontroller unit 300. Related failure statistics. Only when the system 100 is started, the system chip 200 allows write access to the freely programmable bits of the memory unit 10, so as to prevent erroneous write access during operation. On the other hand, read access to freely programmable bits of memory cell 10 is always permitted.

[0026] Because the system chip 200 allows a distinction to be made between different reset ev...

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Abstract

To enable a method and a base chip ( 200 ) for monitoring the operation of at least one microcontroller unit ( 300 ) that is intended for at least one application and is associated with a system ( 100 ) to bc further developed in such a way that the operation of the microcontroller unit ( 300 ), which is associated with a serial system, is monitored in such a way as to enable faulty operation, and particularly faulty operation that discharges the battery, to be reliably prevented, it is proposed that the microcontroller unit ( 300 ) has at least one non-volatile memory area ( 10 ) associated with it, the memory area ( 10 ) can be read from and / or written to by the microcontroller unit ( 300 ), and at least one set of statistics, and in particular a set of fault statistics, relating to the operation of the microcontroller unit ( 300 ), can be kept by means of the memory area ( 10 ).

Description

technical field [0001] The invention relates to a method for monitoring the operation of at least one microcontroller unit intended for at least one application and associated with a system. [0002] The invention also relates to a basis chip, and in particular a system basis chip, for monitoring the operation of at least one microcontroller unit intended for at least one application, and to an associated system, in particular a Control System. Background technique [0003] In today's control units, e.g. in automotive electronics, hardened pre-programmed microcontrollers are no longer used, as the fixed pre-programming means that modifications cannot be made thereafter during the ongoing mass production process or by the end user . Motor vehicle manufacturers are therefore increasingly using so-called volatile memory or flash memory in microcontrollers; this volatile memory allows the program code to be rewritten at any time, which can be used during production and in repa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/07G06F1/32G06F11/34G06F1/24G06F11/00
CPCG06F11/0766G06F11/004G06F11/0739G06F11/0757G06F11/073G06F11/0736G06F1/24
Inventor M·瓦纳M·穆特
Owner NXP BV
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