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Method and device for switching between operating modes of a multiprocessor system by means of at least one external signal

A technology of external signals and working modes, applied in the fields of machine execution devices, electrical digital data processing, instruments, etc.

Inactive Publication Date: 2009-11-18
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A targeted switchover to the provided operating mode in dependence on external signals or suppression of the switchover cannot be accomplished in the prior art, ie by means of program-specific flags or access to a certain memory address

Method used

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  • Method and device for switching between operating modes of a multiprocessor system by means of at least one external signal
  • Method and device for switching between operating modes of a multiprocessor system by means of at least one external signal
  • Method and device for switching between operating modes of a multiprocessor system by means of at least one external signal

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Embodiment Construction

[0020] In the following, an execution unit can be expressed as a processor / chip / CPU (Central Processing Unit), or as an FPU (Floating Point Unit), DSP (Digital Signal Processor), co-processor or ALU (Operation logic unit).

[0021] The present invention relates to a figure 1 The multiprocessor system W100 shown in is equipped with: at least two execution units W110a, W110b, a comparison unit W120, and a conversion unit W150. The execution units are each connected via an optional buffer W111a, W111b to a comparison unit W120 and a switchover unit W150. The conversion unit W150 has at least two output ports, corresponding to the two system interfaces W130a, W130b. Through the above-mentioned interface, registers, memory or peripheral devices such as digital output ports, digital / analog (D / A)-converters, and communication controllers can be controlled.

[0022] Such a multiprocessor system can operate in at least two operating modes, namely in a comparison mode VM and a perfor...

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Abstract

The method involves switching between operating modes e.g. safety and performance modes, of computer units in a multiprocessor system using a switching unit. Data distribution and / or selection of a data source are dependent upon one of the operating modes. Switching is triggered and / or indicated by a control signal e.g. mode signal, based on the operating modes. The control signal is generated based on the units. An independent claim is also included for a system with a unit for distributing data from a data source.

Description

technical field [0001] The invention relates to a device and a method for switching between at least two operating modes of a multiprocessor system with at least two execution units and a corresponding processor system. Background technique [0002] Transient failures caused by alpha particles or cosmic rays have increasingly become a problem for integrated semiconductor circuits. By reducing the structure width, lowering the voltage and increasing the pulse repetition frequency, the likelihood that a voltage peak due to alpha particles or cosmic radiation will distort a logic value in an integrated circuit is increased. Distorted calculation results may be a consequence of this. Therefore, in reliability-related systems, especially in automobiles, it is necessary to reliably detect a fault of the kind described above. [0003] In safety-related systems, such as the ABS-regulating system (anti-lock brake system) in the car - in these systems, malfunctions of the electroni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/38
CPCG06F2201/845G06F11/1679G06F11/1641G06F11/1695G06F11/1654
Inventor R·韦伯勒B·穆勒R·安杰鲍尔Y·科拉尼R·各默利克E·博厄尔T·科特克W·普菲弗F·哈特维克W·哈特K·格雷比斯
Owner ROBERT BOSCH GMBH
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