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Error detection on IC input/output pins

A technology of integrated circuits and pins, which is applied in the direction of electronic circuit testing, marginal circuit testing, digital circuit testing, etc., and can solve problems such as wrong addressing and jamming

Active Publication Date: 2021-08-10
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microcontrollers have pins which may be stuck, or may be incorrectly addressed in e.g. analog input mode

Method used

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  • Error detection on IC input/output pins
  • Error detection on IC input/output pins
  • Error detection on IC input/output pins

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Embodiment Construction

[0029] In view of the foregoing, the present disclosure, therefore, through one or more of its various aspects, embodiments and / or particular features or sub-components, intends to exhibit one or more of the advantages as particularly pointed out below.

[0030] This disclosure describes a microcontroller that can perform error detection on pins. When microcontrollers are used to control LED driver circuits to meet UL Class 2 requirements as well as temperature Class P requirements, the software needs to be UL 60730 compliant. The microcontroller described here can detect if a pin is stuck high or low and if the analog input mux is addressed incorrectly. Protection can be triggered when an error is detected. The disclosure contained herein describes, for example, how to detect stuck input / output pins configured for digital outputs, and incorrect multiplexer addressing for analog input pins.

[0031] The methods described herein are illustrative examples, and thus are not int...

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Abstract

A method for detecting an error on an input / output (IO) pin of an integrated circuit comprising using the input / output of the integrated circuit in a first mode by receiving or sending a first value as analog or digital data pin. After each instance of using the input / output pin in the first mode, the input / output pin is toggled in the test mode. The test mode includes providing a second value different from the first value during a setup time after using the input / output pin in the first mode, receiving back a result value based on providing the second value, a measurement result value during the setup time, and Errors on input / output pins of the integrated circuit are identified based on the measured resulting values.

Description

technical field [0001] This disclosure relates to the field of integrated circuits. More specifically, the present disclosure relates to the field of error detection on input / output pins of integrated circuits. Background technique [0002] Integrated circuits include processors and microprocessors such as microcontrollers. Microcontrollers have pins that may be stuck, or may be incorrectly addressed in e.g. analog input mode. Conventionally, 2 lanes are used to detect stuck pins or misaddressing for call protection. [0003] US2002 / 0135391, US2008 / 0265262, US2011 / 0148429 and US2011 / 0234105 show different ways of using feedback loops to monitor output values. This feedback loop is part of the integrated circuit that provides the output value. Contents of the invention [0004] The present invention provides a solution for pin stuck detection on input / output pins of integrated circuits including microprocessors. The input / output pins of the integrated circuit are linke...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/319G01R31/30H05B45/30H05B44/00
CPCG01R31/31905G01R31/31926G01R31/3004H05B47/20H05B45/00H05B45/50G01R31/64G01R31/2884H05B41/2851
Inventor 方玉红M·乔勒克H·古迪帕蒂G·格瑞沃
Owner SIGNIFY HLDG BV