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CN107783859A - A kind of configurable watchdog circuit for resetting duration and timing length - Google Patents

A kind of configurable watchdog circuit for resetting duration and timing length Download PDF

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Publication number
CN107783859A
CN107783859A CN201711185535.0A CN201711185535A CN107783859A CN 107783859 A CN107783859 A CN 107783859A CN 201711185535 A CN201711185535 A CN 201711185535A CN 107783859 A CN107783859 A CN 107783859A
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China
Prior art keywords
chip
pins
watchdog
resistance
connection
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CN201711185535.0A
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Chinese (zh)
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CN107783859B (en
Inventor
李慧斌
邵慧
武守净
温振新
赵成志
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Shandong Youren Information Technology Co Ltd
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Shandong Youren Information Technology Co Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0751Error or fault detection not based on redundancy
    • G06F11/0754Error or fault detection not based on redundancy by exceeding limits
    • G06F11/0757Error or fault detection not based on redundancy by exceeding limits by exceeding a time limit, i.e. time-out, e.g. watchdogs
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Debugging And Monitoring (AREA)

Abstract

The present invention relates to a kind of configurable watchdog circuit for resetting duration and timing length.The configurable watchdog circuit for resetting duration and timing length, including for connecting the watchdog circuit of monitored system, the watchdog circuit, which is connected with, resets duration configuration circuit and timing length configuration circuit.The circuit design is reasonable, novel, the setting of the length to positioning duration can be realized, realize that watchdog system matches with monitored SCM system, it ensure that the resetting/restarting of SCM system, it has been improved the operating efficiency of watchdog system, the setting for the length for resetting duration is realized, reset duration, which has been effectively ensured, can complete the resetting/restarting processing of single-chip microcomputer, be used suitable for being widely popularized.

Description

A kind of configurable watchdog circuit for resetting duration and timing length
Technical field:
The present invention relates to a kind of configurable watchdog circuit for resetting duration and timing length.
Background technology:
House dog is the monitoring system being monitored to the running situation for the system that is monitored, when monitored system operation is bad When, it is mostly to fix that operation, the watchdog system timing length used at present such as monitored system can be restarted or be resetted Length, also, timing length is shorter, and single-chip microcomputer (monitored system) the startup optimization time that we use in the past is shorter, makes Had no problem with current watchdog system, but with the complication of product, the startup time of single-chip microcomputer (monitored system) Rise appreciably, cause existing watchdog system can not realize that the monitoring to the system that is monitored is handled, easily cause the house dog to be The startup processing for multiplicating or the reset united to the system that is monitored.
Also, the reset duration restarted or resetted of existing watchdog system is shorter, easily cause single-chip microcomputer (monitored System) reset processing is imperfect, and reset the monolithic device that duration is insufficient to allow and carry out resetting/restarting.
Wherein, timing length is:Watchdog system gives SCM system one reset signal, and SCM system starts multiple Position, if operation conditions of system reset does not reach good also, watchdog system can reset letter at one to SCM system Number, timing length is then the time span between two reset signals.If position the corresponding monitored single-chip microcomputer system of duration The startup time of system falls short of, then easily causes watchdog system repeated to monolithic processor resetting signal.
Wherein, resetting duration is:Watchdog system gives SCM system one high level (or low level) signal, monolithic Machine system will be resetted, and the time span of the duration of high level (or low level) signal is then reset duration.If Reset duration to be less than the reset of single-chip microcomputer or start the time, easily cause monolithic processor resetting/restart imperfect, and resetting/restarting Failure.
The content of the invention:
The invention provides a kind of configurable watchdog circuit for resetting duration and timing length, the circuit design rationally, Novelty, the setting of the length to positioning duration can be realized, realize that watchdog system matches with monitored SCM system, The resetting/restarting of SCM system is ensure that, has been improved the operating efficiency of watchdog system, realizes the length for resetting duration Short setting, reset duration, which has been effectively ensured, can complete the resetting/restarting processing of single-chip microcomputer, be used suitable for being widely popularized, solution Determine problems of the prior art.
The present invention is that technical scheme is used by solving above-mentioned technical problem:
A kind of configurable watchdog circuit for resetting duration and timing length, including for connecting guarding the gate for monitored system Dog circuit, the watchdog circuit, which is connected with, resets duration configuration circuit and timing length configuration circuit.
The watchdog circuit includes a watchdog chip, the model SP706 of watchdog chip, and the 1 of watchdog chip No. 8 pins of watchdog chip are connected after number resistance R2 of pin serial connection one, after the electric capacity C2 of No. 2 pin serial connections one of watchdog chip Ground connection, No. 3 pins ground connection of watchdog chip, electric capacity C5, the electricity of a ground connection of the ground connection of No. 4 pins connection one of watchdog chip R7 and a resistance R3, resistance R3 other end connection power supply are hindered, No. 5 pins of watchdog chip connect a voltage-regulator diode D1, No. 2 pins of an interface chip J1 are connected after voltage-regulator diode D1 one resistance R1 of other end series connection, No. 1 of interface chip J1 is drawn Pin connects power supply, the resistance R6 of the ground connection of No. 6 pins connection one of watchdog chip and monitored system.
The timing length circuit includes a chip U1, and chip U1 model CD4024B, chip U1 No. 1 pin connect Connect No. 7 pins of watchdog chip, the electric capacity C1 of the chip U1 ground connection of No. 14 pins connection one, chip U1 No. 7 pins ground connection.
The resistance R8 and one for resetting No. 3 pins that duration configuration circuit includes a connection chip U1 connects chip U1's The resistance R9 of No. 4 pins, resistance the R8 other end are connected with the resistance R9 other end is connected in a tie point, the electricity of tie point connection one The R10 and FET Q1 of a resistance R11, resistance R10 connection one grid is hindered, is connected between the drain electrode of FET and source electrode The electric capacity C8 of one voltage-stabiliser tube diode D, the resistance R11 ground connection of other end connection one.
No. 6 pins of the watchdog chip are also connected with No. 2 pins of a chip U3, chip U3 model SN74LVC1G123, chip U3 No. 1 pin and No. 4 pins ground connection, the electric capacity C3 of the chip U3 ground connection of No. 8 pins connection one and One resistance R5, resistance R5 other end connection chip U3 No. 7 pins and an electric capacity C4, electric capacity C4 other end connection chip U3 No. 6 pins, chip U3 No. 5 pins connect No. 2 pins that chip U1 is connected after a diode D2.
The present invention uses said structure, and the circuit design is reasonable, novel, can realize setting for the length to positioning duration It is fixed, realize that watchdog system matches with monitored SCM system, that is, ensure that the resetting/restarting of SCM system, have The operating efficiency of watchdog system is improved, realizes the setting for the length for resetting duration, reset duration has been effectively ensured can The resetting/restarting processing of single-chip microcomputer is completed, peripheral counter is effectively increased, the reset signal of watchdog system is counted Number, equivalent to timing length is extended, the feeding-dog signal that peripheral counter is resetted is by that can trigger unit multi-frequency oscillation again Device, it effectively prevent counter and be constantly in reset state, watchdog system failure, counter output is answered with capacitance resistance ware Position signal is demonstrated to realize the regulation of self reset of counter and reset duration, it is achieved thereby that timing length and reset The configuration of duration, effectively realize watchdog system and be applicable a variety of monitored systems, used suitable for being widely popularized.
Brief description of the drawings:
Fig. 1 is the circuit connection diagram of the present invention.
Embodiment:
For the technical characterstic for illustrating this programme can be understood, below by embodiment, and its accompanying drawing is combined, to this hair It is bright to be described in detail.
As shown in fig. 1, a kind of configurable watchdog circuit for resetting duration and timing length, including supervised for connecting The watchdog circuit of control system, the watchdog circuit, which is connected with, resets duration configuration circuit and timing length configuration circuit.
In order to realize that monitoring of the watchdog system to the system operation situation that is monitored is handled, the watchdog circuit includes one Watchdog chip, connect after the model SP706 of watchdog chip, the resistance R2 of No. 1 pin serial connection one of watchdog chip and guard the gate No. 8 pins of dog chip, it is grounded after the electric capacity C2 of No. 2 pin serial connections one of watchdog chip, No. 3 pins of watchdog chip connect Ground, electric capacity C5, the resistance R7 and a resistance R3 of a ground connection of the ground connection of No. 4 pins connection one of watchdog chip, resistance R3's is another One end connects power supply, and No. 5 pins of watchdog chip connect a voltage-regulator diode D1, voltage-regulator diode D1 other end series connection one Connect No. 2 pins of an interface chip J1 after resistance R1, interface chip J1 No. 1 pin connection power supply, No. 6 of watchdog chip The resistance R6 of the ground connection of pin connection one and monitored system.
In order to effectively realize interval long enough of the watchdog system to the signal of monitored system reboot/reset, avoid by In the case that monitoring system is not restarted/resetted completely, watchdog system gives monitored system signal again, the timing length Circuit includes a chip U1, and No. 7 of chip U1 model CD4024B, chip U1 No. 1 pin connection watchdog chip are drawn Pin, the electric capacity C1 of the chip U1 ground connection of No. 14 pins connection one, chip U1 No. 7 pins ground connection.
In order to ensure each reset signal can complete monitored system restart or the whole process of reset processing, institute State No. 4 pins for the connection chips of resistance R8 and one U1 for resetting No. 3 pins that duration configuration circuit includes a connection chip U1 Resistance R9, resistance the R8 other end are connected with the resistance R9 other end is connected in a tie point, tie point connection one resistance R10 and one The FET Q1 of resistance R11, resistance R10 connection one grid, is connected with a voltage-stabiliser tube between the drain electrode of FET and source electrode The electric capacity C8 of diode D, resistance the R11 ground connection of other end connection one.
No. 6 pins of the watchdog chip are also connected with No. 2 pins of a chip U3, chip U3 model SN74LVC1G123, chip U3 No. 1 pin and No. 4 pins ground connection, the electric capacity C3 of the chip U3 ground connection of No. 8 pins connection one and One resistance R5, resistance R5 other end connection chip U3 No. 7 pins and an electric capacity C4, electric capacity C4 other end connection chip U3 No. 6 pins, chip U3 No. 5 pins connect No. 2 pins that chip U1 is connected after a diode D2.
Using the watchdog circuit of configurable the reset duration and timing length of the present invention, SP706 chips are seen for basic Door dog chip, CD4024B are counting chip, and SN74LVC1G123 is that the single channel with Schmidt trigger input can trigger list again Steady multi-frequency generator, No. 7 pins of watchdog chip are connected with chip U1 No. 1 pin, realize house dog timing length Extension;No. 6 pins of watchdog chip are feeding-dog signal and technology device reset signal, No. 6 pins and chip of watchdog chip U3 No. 2 pins are connected, and realize watchdog chip feeds dog and chip U1 reset;Resistance R11 and electric capacity C6 composition capacitance-resistances Charge-discharge circuit, when time-out is charged without feeding when No. 3 pins that dog causes chip U1 export high level, when being charged to CLR When level reaches chip U1 reset level, then reset chip U1, realizes chip U1 self reset and resets the regulation of duration.
Above-mentioned embodiment cannot function as limiting the scope of the invention, for the technology people of the art For member, any alternate modification or conversion made to embodiment of the present invention are all fallen within protection scope of the present invention.
Part is not described in detail by the present invention, is the known technology of those skilled in the art of the present technique.

Claims (5)

1. a kind of configurable watchdog circuit for resetting duration and timing length, including for connecting the house dog of monitored system Circuit, it is characterised in that:The watchdog circuit, which is connected with, resets duration configuration circuit and timing length configuration circuit.
A kind of 2. configurable watchdog circuit for resetting duration and timing length according to claim 1, it is characterised in that: The watchdog circuit includes a watchdog chip, the model SP706 of watchdog chip, No. 1 pin string of watchdog chip Join No. 8 pins that watchdog chip is connected after a resistance R2, be grounded, see after the electric capacity C2 of No. 2 pin serial connections one of watchdog chip Door dog chip No. 3 pins ground connection, watchdog chip No. 4 pins connection one ground connection electric capacity C5, one ground connection resistance R7 and One resistance R3, resistance R3 other end connection power supply, No. 5 pins of watchdog chip connect a voltage-regulator diode D1, voltage stabilizing two No. 2 pins of an interface chip J1, interface chip J1 No. 1 pin connection are connected after pole pipe D1 one resistance R1 of other end series connection Power supply, the resistance R6 of the ground connection of No. 6 pins connection one of watchdog chip and monitored system.
A kind of 3. configurable watchdog circuit for resetting duration and timing length according to claim 2, it is characterised in that: The timing length circuit includes a chip U1, chip U1 model CD4024B, chip U1 No. 1 pin connection house dog No. 7 pins of chip, the electric capacity C1 of the chip U1 ground connection of No. 14 pins connection one, chip U1 No. 7 pins ground connection.
A kind of 4. configurable watchdog circuit for resetting duration and timing length according to claim 3, it is characterised in that: The resistance R8 and one for resetting No. 3 pins that duration configuration circuit includes a connection chip U1 connects chip U1 No. 4 pins Resistance R9, the resistance R8 other end is connected with the resistance R9 other end is connected in a tie point, tie point connect a resistance R10 and The FET Q1 of one resistance R11, resistance R10 connection one grid, is connected with a voltage stabilizing between the drain electrode of FET and source electrode The electric capacity C8 of pipe diode D, resistance the R11 ground connection of other end connection one.
A kind of 5. configurable watchdog circuit for resetting duration and timing length according to claim 3, it is characterised in that: No. 6 pins of the watchdog chip are also connected with No. 2 pins of a chip U3, chip U3 model SN74LVC1G123, core Piece U3 No. 1 pin and No. 4 pin ground connection, the electric capacity C3 and a resistance R5, resistance R5 of the chip U3 ground connection of No. 8 pins connection one Other end connection chip U3 No. 7 pins and an electric capacity C4, electric capacity C4 other end connection chip U3 No. 6 pins, chip U3 No. 5 pins connect No. 2 pins of connection chip U1 after a diode D2.
CN201711185535.0A 2017-11-23 2017-11-23 Watchdog circuit capable of configuring reset duration and timing duration Active CN107783859B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109086154A (en) * 2018-07-26 2018-12-25 郑州云海信息技术有限公司 One kind is for detecting BIOS watchdog function inverse timing device and method
CN112084054A (en) * 2020-08-17 2020-12-15 浪潮思科网络科技有限公司 Watchdog circuit, and dog feeding method and device
CN112506694A (en) * 2020-12-24 2021-03-16 杭州塔石物联网科技有限公司 Watchdog circuit capable of configuring reset time and timing time

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CA1223080A (en) * 1984-05-26 1987-06-16 Hisataka Kobayashi Watchdog timer
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CN106528244A (en) * 2016-11-25 2017-03-22 迈普通信技术股份有限公司 Automatic loading system and method of FPGA (Field-Programmable Gate Array) configuration file
CN206097092U (en) * 2016-12-16 2017-04-12 广州市正唐信息科技有限公司 Adjustable reset pulse's watchdog circuit
CN206224444U (en) * 2016-12-02 2017-06-06 山东有人信息技术有限公司 A kind of configurable watchdog circuit for feeding the dog cycle
CN207817678U (en) * 2017-11-23 2018-09-04 山东有人信息技术有限公司 A kind of configurable watchdog circuit for resetting duration and timing length

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109086154A (en) * 2018-07-26 2018-12-25 郑州云海信息技术有限公司 One kind is for detecting BIOS watchdog function inverse timing device and method
CN109086154B (en) * 2018-07-26 2022-02-18 郑州云海信息技术有限公司 Device and method for detecting countdown of BIOS watchdog function
CN112084054A (en) * 2020-08-17 2020-12-15 浪潮思科网络科技有限公司 Watchdog circuit, and dog feeding method and device
CN112506694A (en) * 2020-12-24 2021-03-16 杭州塔石物联网科技有限公司 Watchdog circuit capable of configuring reset time and timing time

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