WO2000004517A1 - Method for switching on an electrically operated current-consuming component, and electronic circuit configuration - Google Patents

Method for switching on an electrically operated current-consuming component, and electronic circuit configuration Download PDF

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Publication number
WO2000004517A1
WO2000004517A1 PCT/EP1999/005053 EP9905053W WO0004517A1 WO 2000004517 A1 WO2000004517 A1 WO 2000004517A1 EP 9905053 W EP9905053 W EP 9905053W WO 0004517 A1 WO0004517 A1 WO 0004517A1
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WO
WIPO (PCT)
Prior art keywords
component
receiver
mode
code word
data telegram
Prior art date
Application number
PCT/EP1999/005053
Other languages
German (de)
French (fr)
Inventor
Rainer Vens
Dirk Wolf
Peter Lunova
Original Assignee
Leopold Kostal Gmbh & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Leopold Kostal Gmbh & Co. Kg filed Critical Leopold Kostal Gmbh & Co. Kg
Publication of WO2000004517A1 publication Critical patent/WO2000004517A1/en

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • G07C2009/00365—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks in combination with a wake-up circuit
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
    • G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
    • G07C2009/00793—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by Hertzian waves
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the invention relates to the field of waking electrically operated, power-consuming components when they are in a sleep mode, for example in a stand-by mode.
  • the invention relates to a method for switching an electrically operated, power-consuming component from a sleep mode into its working mode, which switching on of the component is triggered by the input of a data telegram containing the information for waking the component.
  • the invention relates to an electronic circuit arrangement for applying an alarm signal to an electrically operated, power-consuming component! comprising a receiving device for receiving a wake-up signal, the output of which is connected to the input of the component.
  • Keyless Access Authorization control systems use, among other things, radio remote control systems comprising a motor vehicle-side transceiver unit and one or more identification transmitters (ID transmitters) serving as “keys”.
  • ID transmitters identification transmitters
  • the receiver In contrast to the mobile ID transmitter, which only consumes power when actuated, the receiver, at which it is usually a superhet receiver that ensures readiness to receive as constantly as possible, so that access to the motor vehicle is available at all times by an authorized user.
  • These systems use a code which is sent by the mobile ID transmitter on the radio link to the motor vehicle-side transmitter
  • systems have been used in which the receiver module must be switched on continuously, and such an electronic receiver module can be provided for recognizing a specific wake-up routine, according to which, depending on the system used, either n a certain code word or a certain data format must be recognized so that after recognizing the code the power-consuming component, for example a microprocessor, can be switched from its idle mode to its working mode.
  • the result is often an incorrect recognition of the received data format with a correspondingly frequent incorrect wake-up of the microprocessor, especially in a strongly (radio) disturbed environment.
  • the microprocessor therefore also becomes a power consumer when a wake-up code has actually not been sent.
  • the receiver is switched on and off cyclically and is therefore in a polling mode.
  • the time intervals in which the receiver is in its switched-off state are dimensioned such that the response time of the system is sufficiently fast that the polling mode is not noticeable to a user.
  • Receiving a transmitted code is then only possible in those time intervals in which the receiver is ready to receive.
  • the receiver In systems which use the recognition of a certain data word as a wake-up signal, the receiver must of course remain switched on at least as long so that the entire code word can be received in this time interval. To ensure secure reception of the code word To guarantee, the receiver's readiness to receive must be a multiple of the length of the transmitted code word.
  • the invention is therefore based on the object, on the one hand, of providing a method for switching an electrically operated, current-consuming component from a sleep mode into its working mode, the current consumption of which is reduced compared to the previously known methods.
  • the invention is based on the object of providing a generic electronic circuit arrangement, the current consumption of which is reduced in sleep mode.
  • the method-related object is achieved in that the information intended to wake the component in a data message consists cumulatively of a specific data format and a code word contained in the data message, the data format of the data message being checked for its validity in a first step and wherein This step, if the received data format has been recognized as the valid one, is followed by a check of the data telegram for the presence of a code word valid for waking the component, the power-consuming component being switched to its working mode when the code word in the data telegram included and has been recognized as the valid for waking the device.
  • circuit arrangement-related problem is solved according to the invention in that the circuit arrangement is assigned an application-specific circuit for operating a receiver in a polling mode and for recognizing the data telegram received via the receiver with regard to its data format and a code word contained therein, which circuit is assigned by means of an E / A interface to the receiver and the interrupt input of the component closed is.
  • the code for waking the current-consuming component which is in a sleep mode is composed of the recognition of a valid data format and the recognition of a code word contained in the wake-up signal. Only when both code components - data format and code word - have been recognized as the respectively valid ones, is the power-consuming electrical component switched from its idle mode to its working mode. It is expedient to send the code word in a different data format than that which is to be recognized as a code. By following the recognition of a valid code word following the recognition of a valid data format, the wake-up security of the component is considerably increased while avoiding incorrect wake-up processes. As a result, power savings compared to systems that only recognize the recognition of a specific data format are increased.
  • a receiver In order to recognize a valid data format, a receiver only needs to be switched to ready for reception for a considerably shorter time compared to the length of time required to receive a valid code word.
  • the time intervals in which the receiver is in its ready-to-receive state need only be so short that a transmitted data format can be detected. It is therefore possible to leave the receiver in its ready-to-receive state only if a valid data format has been received.
  • the power consumption of the receiver module is thus initially reduced to receiving a valid data format; the switch-on time is only extended when a valid data format has been received.
  • the power-consuming component is only switched on when a valid code word has also been recognized. The power consumption in such a method is therefore reduced to a minimum.
  • an application-specific circuit which is aimed at the polling operation of the receiver, the evaluation of the received data format and the evaluation of a code word contained in the wake-up signal is used to implement such a method. While the power consumption of a Superhet receiver construction steins in the context of a keyless access control device in motor vehicles between 3 and 20 mA, the power consumption of such an application-specific circuit can be less than 0.1 mA.
  • the application-specific circuit is expediently designed as an integrated circuit and thus as an ASIC.
  • the receiver and the downstream component to be woken up, for example a microprocessor, are connected to the I / O interface of the ASIC module.
  • the receiver provided for receiving the wake-up signal need not only be ready to receive in only short time intervals , but, as provided in an exemplary embodiment, only needs to be switched on in such time intervals that are several times longer than those time intervals in which the receiver is ready to receive. This measure also leads to a reduction in the power consumption in the sleep mode of such an electronic circuit arrangement.
  • Such a method is preferably used in the context of a keyless access authorization control for a motor vehicle.
  • the load on the motor vehicle battery is then reduced to a minimum when the engine is switched off.
  • Fig. 1 a schematic block diagram of an electronic circuit
  • Circuit arrangement for supplying an electrically operated, current-consuming component with wake-up signals
  • Fig. 3 a schematic representation of the power consumption of the
  • An electronic circuit arrangement 1 is used to apply a wake-up signal to a microprocessor 2.
  • the circuit arrangement 1 further comprises a receiver 3 to which a receiving antenna 4 is connected on the input side.
  • the receiver 3 is connected to the I / O interface 5 of an ASIC 6.
  • the microprocessor 2 is also connected with its interrupt input to the I / O interface 5 of the ASIC 6.
  • the circuit arrangement 1 is part of a transceiver device used in a motor vehicle (not shown) for carrying out a keyless access authorization check.
  • This control system also includes at least one ID transmitter, from which a wake-up signal is sent for the subsequent implementation of a question-answer dialog for the access authorization control if the person wearing this ID transmitter wishes to have access to the motor vehicle.
  • the receiver 3 In its idle mode, in which the motor of the motor vehicle is generally switched off, the receiver 3 is in a polling mode, in which it is switched on and off between its operational state ready to receive and its non-operational state. It is provided that the ratio of switch-on time to switch-off time is approximately 1:10. If the current consumption of the receiver is assumed to be 5 mA, this results in a current consumption of 0.5 mA with respect to the receiver module 3.
  • the polling operation of the receiver 3 is controlled by the ASIC 6.
  • the ASIC 6 has a self-consumption of less than 0.1 mA.
  • the polling operation of the receiver 3 is shown in the flow chart shown in FIG. 2 in the two boxes above.
  • the microprocessor 2 is in this idle or standby mode during this operation of the ASIC 6 or the receiver 3.
  • the I / O interface 5 of the ASIC 6 is connected as an output, the level of which is high. If a valid data format is received within a time interval in which the receiver 3 is ready to receive, the polling operation of the receiver 3 is interrupted in a first step, the receiver 3 remaining switched to ready to receive. By the receiver 3 remaining in its ready-to-receive state, the latter can now receive a code word contained in a data telegram. To reduce the reception time of the code word it can be provided that the code word is sent as a preamble to a longer or more extensive data telegram and thus at the beginning.
  • a coding with regard to the position of the preamble in the data telegram is expediently specified in the data telegram.
  • the resulting advantages lead to a reduction in the duty cycle of the receiver. On the one hand, the receiver does not need to be switched on to receive the entire data telegram to recognize the code word (preamble), but only over the length of a data telegram section.
  • the on-time of the receiver only needs to be one data telegram length to receive the entire data telegram, since even at the beginning of the reception of a data telegram, for example in its second preamble position, the encoding of the received data telegram with respect to its components is possible, so that this can be done can then be evaluated as intended. If no code word or no valid code word is contained in the data telegram, the receiver 3 is switched back to polling mode by the ASIC 6. If the valid code word is also recognized in the transmitted data telegram after recognition of the valid data format, then the receiver 3 is switched permanently to its ready-to-receive operating state and the level of the I / O interface 5 of the ASIC 6 is pulled low.
  • an interrupt is output to the microprocessor 2 by means of the falling edge.
  • the microprocessor 2 is awakened by this interrupt signal and brought into its operating state.
  • the ASIC 6 then switches its I / O interface 5 as an input.
  • the operational microprocessor 2 takes over the further evaluation of the data telegram. Is the data telegram evaluated and are all Actions performed, which may also include a bidirectional question-answer dialog, the ASIC 6 resumes operation by a reset pulse triggered by the microprocessor 2 and controls the receiver 3 again in its polling mode.
  • the I / O interface 5 is then in turn connected as an output with a high level.
  • the current consumption resulting from the operation of this method is schematically summarized in the diagram in FIG. 3, in which the x-axis is the time axis and in which the current consumption [mA] is plotted on the y-axis.
  • the ASIC 6 has only a very low power consumption for controlling the polling operation of the receiver 3 and for recognizing a data format of a received data telegram and a code word contained therein. Only in the time intervals in which the polling operation of the receiver 3 is ready to receive does the power consumption increase by the amount of power required by the receiver 3. In the illustrated embodiment, this is approximately 5 mA.
  • the power consumption Upon receipt of a valid data format, the power consumption initially remains constant due to a longer switch-on time of the receiver 3, corresponding to a power consumption resulting from the operation of the receiver 3 and of the ASIC 6. If a valid code word has been recognized by the ASIC 6 in the received data telegram, the procedure is as above described, the microprocessor 2 awakened so that it is in its operational state and is therefore also a corresponding power consumer. The power consumption of such a microprocessor generally exceeds the power consumption of the receiver. If the microprocessor 2 is ready for operation, the ASIC 6 is in the switched-off state, so that the total current consumption of the circuit arrangement 1 is reduced by the current consumption of the ASIC 6. After the circuit arrangement 1 has been switched back to the polling operation of the receiver 3 controlled by the ASIC 6 by the microprocessor 3, the current consumption is as shown in FIG. 3 until a valid data format is received.
  • the ASIC is designed such that the switch-off time of the receiver is variably adjustable.
  • the response time and the power consumption of the system can be freely selected depending on the application, for example depending on the time of day. Provision can also be made to change the operating mode of the ASIC so that the first wake-up stage - the data format detection - is to be carried out with different numbers of bits. With this setting, the priority and the response time of the system can be set application-specifically.
  • the processor's oscillator (s) remain switched on to increase the system's response speed, even when the processor is shut down in its standby mode. The oscillators use only a fraction of the total amount of power in the entire processor.

Abstract

The invention relates to a method for switching on an electrically operated current-consuming component from a resting mode to itsworking mode. The switching-on of the component is triggered bythe input of a data telegram containing the information for waking up the component. The method is characterised in that the information for waking up the component in the data telegram consistscumulatively of a set data format and a code word contained in the data telegram. In a first step, the data format of the data telegram is checked for validity. If the received data format is identified as valid, the data telegram is then checked directly afterwards for the presence of a valid code word for waking up the component. The current-consuming component is switched into its working mode when the code word is contained in the data telegram and has been identified as the valid code word for waking up the component. The invention also relates to an electronic circuit configuration for subjecting an electrically operated, current-consuming component to wake-up and action signals. The inventive circuit configuration comprises a receiving device for receiving a wake-up signal, the output of the receiving device being connected tothe input of the component. This part of the invention is charac

Description

Verfahren zum Einschalten eines elektrisch betriebenen, stromverbrauchenden Bauelements sowie elektronische Method for switching on an electrically operated, power-consuming component and electronic
SchaltungsanordnungCircuit arrangement
Die Erfindung bezieht sich auf das Gebiet des Weckens von elektrisch betriebenen, stromverbrauchenden Bauelementen, wenn diese sich in einem Ruhemodus, etwa in einem Stand-by-Modus befinden. Insbeson- dere betrifft die Erfindung ein Verfahren zum Einschalten eines elektrisch betriebenen, stromverbrauchenden Bauelements aus einem Ruhemodus in seinen Arbeitsmodus, welches Einschalten des Bauelements durch den Eingang eines die Information zum Wecken des Bauelements beinhaltendes Datentelegramm getriggert wird. Ferner betrifft die Erfindung eine elektronische Schaltungsanordnung zum Beaufschlagen eines elektrisch betriebenen, stromverbrauchenden Bauelements mit einem Wecksigna! umfassend eine Empfangseinrichtung zum Empfangen eines Wecksignals, deren Ausgang an den Eingang des Bauelements angeschlossen ist.The invention relates to the field of waking electrically operated, power-consuming components when they are in a sleep mode, for example in a stand-by mode. In particular, the invention relates to a method for switching an electrically operated, power-consuming component from a sleep mode into its working mode, which switching on of the component is triggered by the input of a data telegram containing the information for waking the component. Furthermore, the invention relates to an electronic circuit arrangement for applying an alarm signal to an electrically operated, power-consuming component! comprising a receiving device for receiving a wake-up signal, the output of which is connected to the input of the component.
Bei verschiedenen Anwendungen werden elektrisch betriebene, stromverbrauchende Bauelemente in einen Ruhemodus bzw. Stand-by-Modus geschaltet, wenn ein solches Bauelement aktuell nicht benötigt wird. Ein solches Herunterfahren bestimmter elektronischer Bauelemente kann ins- besondere zu einer Herabsetzung des Stromverbrauches eingesetzt werden. Ein solches Powermanagement zur Reduzierung des Stromverbrauches wird beispielsweise im Kraftfahrzeugbereich bei schlüssellosen Zu- gangsberechtigungskontrollverfahren eingesetzt. Schlüssellose Zugangs- berechtigungskontrollsysteme verwenden unter anderem Funkfernsteuersysteme umfassend eine kraftfahrzeugseitige Sende-Empfangseinheit sowie einen oder mehrere als „Schlüssel" dienende Identifikationsgeber (ID-Geber). Im Gegensatz zu dem mobilen ID-Geber, der nur bei einer Betätigung Strom aufnimmt, muß der Empfänger, bei dem es sich üblicherweise um einen Superhet-Empfänger handelt, eine möglichst ständige Empfangsbereitschaft gewährleisten, damit der Zugang zu dem Kraftfahrzeug von einem berechtigten Benutzer jederzeit gegeben ist. Diese Systeme verwenden einen Code, der von dem mobilen ID-Geber auf der Funkstrecke an die kraftfahrzeugseitige Sende-Empfangseinheit übertragen wird. Zu diesem Zweck sind Systeme eingesetzt worden, bei denen der Empfängerbaustein kontinuierlich eingeschaltet sein muß. Ein solcher elektronischer Empfängerbaustein kann zum Erkennen einer bestimmten Weckroutine vorgesehen sein, gemäß der in Abhängigkeit von dem verwendeten System entweder ein bestimmtes Codewort oder ein bestimmtes Datenformat erkannt werden muß, damit nach Erkennen des Codes das stromverbrauchende Bauelement, etwa ein Mikroprozessor von seinem Ruhemodus in seinen Arbeitsmodus geschaltet werden kann. Bei einem Einsatz von Systemen, bei denen die Übertragung eines bestimmten Datenformates als Weckcode vorgesehen ist, ist insbesondere bei einer stark (funk-)gestörten Umgebung eine oftmalige Fehlerkennung des empfangenen Datenformates mit einem entsprechend häufigen Fehlwecken des Mikroprozessors die Folge. Der Mikroprozessor wird daher auch dann zum Stromverbraucher, wenn tatsächlich ein Weckcode gar nicht gesendet worden ist.In various applications, electrically operated, power-consuming components are switched to a sleep mode or standby mode if such a component is not currently required. Such a shutdown of certain electronic components can be used in particular to reduce power consumption. Such power management for reducing the power consumption is used, for example, in the motor vehicle sector in the case of keyless access authorization control methods. Keyless Access Authorization control systems use, among other things, radio remote control systems comprising a motor vehicle-side transceiver unit and one or more identification transmitters (ID transmitters) serving as “keys”. In contrast to the mobile ID transmitter, which only consumes power when actuated, the receiver, at which it is usually a superhet receiver that ensures readiness to receive as constantly as possible, so that access to the motor vehicle is available at all times by an authorized user.These systems use a code which is sent by the mobile ID transmitter on the radio link to the motor vehicle-side transmitter For this purpose, systems have been used in which the receiver module must be switched on continuously, and such an electronic receiver module can be provided for recognizing a specific wake-up routine, according to which, depending on the system used, either n a certain code word or a certain data format must be recognized so that after recognizing the code the power-consuming component, for example a microprocessor, can be switched from its idle mode to its working mode. When using systems in which the transmission of a specific data format is provided as a wake-up code, the result is often an incorrect recognition of the received data format with a correspondingly frequent incorrect wake-up of the microprocessor, especially in a strongly (radio) disturbed environment. The microprocessor therefore also becomes a power consumer when a wake-up code has actually not been sent.
Zur weiteren Stromerspamis werden Systeme eingesetzt, bei denen der Empfänger zyklisch ein- und ausgeschaltet wird und sich somit in einem Polling-Modus befindet. Dabei sind die Zeitintervalle, in denen sich der Empfänger in seinem ausgeschalteten Zustand befindet so bemessen, daß die Reaktionszeit des Systems ausreichend schnell ist, daß der Polling-Modus für einen Benutzer nicht bemerkbar ist. Das Empfangen eines gesendeten Codes ist dann nur in denjenigen Zeitintervallen möglich, in dem der Empfänger empfangsbereit geschaltet ist. Bei Systemen, die die Erkennung eines bestimmten Datenwortes als Wecksignal verwenden, muß der Empfänger naturgemäß zumindest solange eingeschaltet bleiben, damit in diesem Zeitintervall das gesamte Codewort empfangen werden kann. Um einen sicheren Empfang des Codewortes zu gewährleisten, muß die Empfangsbereitschaft des Empfängers zeitlich um ein Vielfaches der Länge des gesendeten Codewortes betragen.To further save electricity, systems are used in which the receiver is switched on and off cyclically and is therefore in a polling mode. The time intervals in which the receiver is in its switched-off state are dimensioned such that the response time of the system is sufficiently fast that the polling mode is not noticeable to a user. Receiving a transmitted code is then only possible in those time intervals in which the receiver is ready to receive. In systems which use the recognition of a certain data word as a wake-up signal, the receiver must of course remain switched on at least as long so that the entire code word can be received in this time interval. To ensure secure reception of the code word To guarantee, the receiver's readiness to receive must be a multiple of the length of the transmitted code word.
Es ist jedoch gewünscht, ein Verfahren bzw. eine elektronische Schal- tungsanordnung bei solchen Systemen zum Einsatz zu bringen, bei denen der Stromverbrauch noch weiter reduziert ist.However, it is desirable to use a method or an electronic circuit arrangement in systems in which the power consumption is reduced even further.
Ausgehend von dem oben diskutierten Stand der Technik liegt der Erfindung daher zum einen die Aufgabe zugrunde, ein Verfahren zum Ein- schalten eines elektrisch betriebenen, stromverbrauchenden Bauelements aus einem Ruhemodus in seinen Arbeitsmodus bereitzustellen, dessen Stromaufnahme gegenüber den vorbekannten Verfahren reduziert ist.On the basis of the prior art discussed above, the invention is therefore based on the object, on the one hand, of providing a method for switching an electrically operated, current-consuming component from a sleep mode into its working mode, the current consumption of which is reduced compared to the previously known methods.
Entsprechend liegt der Erfindung ausgehend von dem oben diskutierten Stand der Technik die Aufgabe zugrunde eine gattungsgemäße elektronische Schaltungsanordnung bereitzustellen, deren Stromaufnahme im Ruhemodus reduziert ist.Accordingly, based on the prior art discussed above, the invention is based on the object of providing a generic electronic circuit arrangement, the current consumption of which is reduced in sleep mode.
Die verfahrensbezogene Aufgabe wird erfindungsgemäß dadurch gelöst, daß die zum Wecken des Bauelements bestimmte Information in einem Datentelegramm kumulativ aus einem bestimmten Datenformat und einem in dem Datentelegramm enthaltenen Codewort besteht, wobei in einem ersten Schritt das Datenformat des Datentelegramms auf seine Gültigkeit hin überprüft wird und wobei sich an diesen Schritt, wenn das empfan- gene Datenformat als das gültige erkannt worden ist, eine Überprüfung des Datentelegramms auf das Vorhandensein eines zum Wecken des Bauelements gültigen Codewortes anschließt, wobei das stromverbrauchende Bauelement in seinen Arbeitsmodus geschaltet wird, wenn das Codewort in dem Datentelegramm enthalten und als das gültige zum Wecken des Bauelements erkannt worden ist.The method-related object is achieved in that the information intended to wake the component in a data message consists cumulatively of a specific data format and a code word contained in the data message, the data format of the data message being checked for its validity in a first step and wherein This step, if the received data format has been recognized as the valid one, is followed by a check of the data telegram for the presence of a code word valid for waking the component, the power-consuming component being switched to its working mode when the code word in the data telegram included and has been recognized as the valid for waking the device.
Die schaltungsanordnungsbezogene Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Schaltungsanordnung ein applikationsspezifischer Schaltkreis zum Betreiben eines Empfängers in einem Polling-Betrieb so- wie zum Erkennen des über den Empfänger eingehenden Datentelegramms hinsichtlich seines Datenformats und eines darin enthaltenen Codewortes zugeordnet ist, welcher Schaltkreis mittels einer E/A-Schnittstelle an den Empfänger und den Interrupt-Eingang des Bauelements an- geschlossen ist.The circuit arrangement-related problem is solved according to the invention in that the circuit arrangement is assigned an application-specific circuit for operating a receiver in a polling mode and for recognizing the data telegram received via the receiver with regard to its data format and a code word contained therein, which circuit is assigned by means of an E / A interface to the receiver and the interrupt input of the component closed is.
Gemäß dem durch die Erfindung bereitgestellten Verfahren setzt sich der Code zum Wecken des in einem Ruhemodus befindlichen stromverbrau- chenden Bauelements aus dem Erkennen eines gültigen Datenformates und dem Erkennen eines in dem Wecksignal enthaltenen Codewortes kumulativ zusammen. Nur wenn beide Codebestandteile - Datenformat und Codewort - als die jeweils gültigen erkannt worden sind, wird das stromverbrauchende elektrische Bauelement aus seinem Ruhemodus in seinen Arbeitsmodus geschaltet. Dabei ist es zweckmäßig, das Codewort in einem anderen Datenformat zu senden als das dasjenige, welches als Code erkannt werden soll. Durch das Nachschalten des Erkennens eines gültigen Codewortes im Anschluß an das Erkennen eines gültigen Datenformates wird erheblich die Wecksicherheit des Bauelementes unter Vermeidung von Fehlweckvorgängen erhöht. Folglich ist eine Stromersparnis gegenüber solchen Systemen, die lediglich die Erkennung eines bestimmten Datenformates erkennen, erhöht. Zum Erkennen eines gültigen Datenformates braucht ein Empfänger nur eine wesentlich kürzere Zeit empfangsbereit geschaltet sein, verglichen mit der Zeitdauer, die mit zum Empfangen eines gültigen Codewortes benötigt wird. Bei einem Betrieb des Empfängers in einem Polling-Modus brauchen diejenigen Zeitintervalle, in denen sich der Empfänger in seinen empfangsbereiten Zustand befindet, nur so kurz zu sein, daß ein gesendetes Datenformat erfaßt werden kann. Es ist daher möglich, den Empfänger nur dann in seinem empfangsbereiten Zustand zu belassen, wenn ein gültiges Datenformat empfangen worden ist. Der Stromverbrauch des Empfängerbausteins ist somit zunächst auf das Empfangen eines gültigen Datenformates reduziert; die Anschaltzeit wird erst dann verlängert, wenn ein gültiges Datenformat empfangen worden ist. Das stromverbrauchende Bauelement wird jedoch erst eingeschaltet, wenn auch ein gültiges Codewort erkannt worden ist. Der Stromverbrauch ist bei einem solchen Verfahren daher auf ein Minimum reduziert.According to the method provided by the invention, the code for waking the current-consuming component which is in a sleep mode is composed of the recognition of a valid data format and the recognition of a code word contained in the wake-up signal. Only when both code components - data format and code word - have been recognized as the respectively valid ones, is the power-consuming electrical component switched from its idle mode to its working mode. It is expedient to send the code word in a different data format than that which is to be recognized as a code. By following the recognition of a valid code word following the recognition of a valid data format, the wake-up security of the component is considerably increased while avoiding incorrect wake-up processes. As a result, power savings compared to systems that only recognize the recognition of a specific data format are increased. In order to recognize a valid data format, a receiver only needs to be switched to ready for reception for a considerably shorter time compared to the length of time required to receive a valid code word. When the receiver is operating in a polling mode, the time intervals in which the receiver is in its ready-to-receive state need only be so short that a transmitted data format can be detected. It is therefore possible to leave the receiver in its ready-to-receive state only if a valid data format has been received. The power consumption of the receiver module is thus initially reduced to receiving a valid data format; the switch-on time is only extended when a valid data format has been received. However, the power-consuming component is only switched on when a valid code word has also been recognized. The power consumption in such a method is therefore reduced to a minimum.
Schaltungstechnisch wird zur Verwirklichung eines solchen Verfahrens ein auf den Polling-Betrieb des Empfängers, die Auswertung des empfangenen Datenformates und die Auswertung eines in dem Wecksignal enthaltenen Codewortes gerichteter applikationsspezifischer Schaltkreis verwendet. Während die Stromaufnahme eines Superhet-Empfängerbau- steins im Rahmen einer schlüssellosen Zugangskontrolleinrichtung bei Kraftfahrzeugen zwischen 3 und 20 mA liegt, kann der Stromverbrauch einer solchen applikationsspezifischen Schaltung weniger als 0,1 mA betragen. Zweckmäßigerweise ist der applikationsspezifische Schaltkreis als integrierter Schaltkreis und somit als ASIC ausgebildet. Der Empfänger und das nachgeschaltete zu weckende Bauelement, beispielsweise ein Mikroprozessor sind an der E/A-Schnittstelle des ASIC-Bausteins angeschlossen.In terms of circuitry, an application-specific circuit which is aimed at the polling operation of the receiver, the evaluation of the received data format and the evaluation of a code word contained in the wake-up signal is used to implement such a method. While the power consumption of a Superhet receiver construction steins in the context of a keyless access control device in motor vehicles between 3 and 20 mA, the power consumption of such an application-specific circuit can be less than 0.1 mA. The application-specific circuit is expediently designed as an integrated circuit and thus as an ASIC. The receiver and the downstream component to be woken up, for example a microprocessor, are connected to the I / O interface of the ASIC module.
Durch das erfindungsgemäße gestaffelte (zweistufige) Erkennen bestimmter Codes, die zum Wecken eines stromverbrauchenden Bauelements vorgesehen sind, wobei in dem ersten Schritt lediglich eine Daten- formaterkennung vorgesehen ist, braucht der zum Empfang des Wecksignales vorgesehene Empfänger nicht nur in nur kurzen Zeitintervallen empfangsbereit zu sein, sondern braucht, wie im in einem Ausführungsbeispiel vorgesehen, nur in solchen zeitlichen Intervallen eingeschaltet zu werden, die um ein mehrfaches länger sind als diejenigen Zeitintervalle, in denen der Empfänger empfangsbereit ist. Auch diese Maßnahme führt zu einer Reduzierung des Stromverbrauchs im Ruhemodus einer solchen elektronischen Schaltungsanordnung.By means of the staggered (two-stage) recognition according to the invention of certain codes which are provided for waking up a power-consuming component, only data format recognition being provided in the first step, the receiver provided for receiving the wake-up signal need not only be ready to receive in only short time intervals , but, as provided in an exemplary embodiment, only needs to be switched on in such time intervals that are several times longer than those time intervals in which the receiver is ready to receive. This measure also leads to a reduction in the power consumption in the sleep mode of such an electronic circuit arrangement.
Bevorzugt wird ein solches Verfahren im Rahmen einer schlüssellosen Zugangsberechtigungskontrolle für ein Kraftfahrzeug eingesetzt. Die Belastung der Kraftfahrzeugbatterie ist bei ausgeschaltetem Motor dann auf ein Minimum reduziert.Such a method is preferably used in the context of a keyless access authorization control for a motor vehicle. The load on the motor vehicle battery is then reduced to a minimum when the engine is switched off.
Weitere Vorteile der Erfindung sowie Ausgestaltungen sind Bestandteil der übrigen Unteransprüche sowie der nachfolgenden Beschreibung eines Ausführungsbeispieles. Es zeigen:Further advantages of the invention and refinements are part of the remaining subclaims and the following description of an exemplary embodiment. Show it:
Fig. 1 : ein schematisiertes Blockschaltbild einer elektronischenFig. 1: a schematic block diagram of an electronic
Schaltungsanordnung zum Beaufschlagen eines elektrisch betriebenen, stromverbrauchenden Bauelements mit Wecksignalen,Circuit arrangement for supplying an electrically operated, current-consuming component with wake-up signals,
Fig. 2: ein Flußdiagramm darstellend ein Verfahren zum Einschalten eines elektrisch betriebenen, stromverbrauchenden Bauelements aus einem Ruhemodus in seinen Arbeitsmodus und2: a flowchart illustrating a method for switching an electrically operated, power-consuming component from a sleep mode into its working mode and
Fig. 3: eine schematisierte Darstellung des Stromverbrauches derFig. 3: a schematic representation of the power consumption of the
Schaltungsanordnung der Figur 1.Circuit arrangement of Figure 1.
Eine elektronische Schaltungsanordnung 1 dient zum Beaufschlagen eines Mikroprozessors 2 mit Wecksignalen. Die Schaltungsanordnung 1 umfaßt ferner einen Empfänger 3, an den eingangsseitig eine Empfangsantenne 4 angeschlossen ist. Der Empfänger 3 ist an die E/A- Schnittstelle 5 eines ASIC 6 angeschlossen. An der E/A-Schnittstelle 5 des ASIC 6 ist ferner der Mikroprozessor 2 mit seinem Interrupt-Eingang angeschlossen.An electronic circuit arrangement 1 is used to apply a wake-up signal to a microprocessor 2. The circuit arrangement 1 further comprises a receiver 3 to which a receiving antenna 4 is connected on the input side. The receiver 3 is connected to the I / O interface 5 of an ASIC 6. The microprocessor 2 is also connected with its interrupt input to the I / O interface 5 of the ASIC 6.
Die Schaltungsanordnung 1 ist Teil einer in einem nicht näher dargestell- ten Kraftfahrzeug eingesetzten Sende-Empfangseiπrichtung zum Durchführen einer schlüssellosen Zugangsberechtigungskontrolle. Zu diesem Kontrollsystem ist ferner zumindest ein ID-Geber zugehörig, von dem zum anschließenden Durchführen eines Frage-Antwort-Dialoges für die Zugangsberechtigungskontrolle ein Wecksignal gesendet wird, wenn die diesen ID-Geber tragende Person einen Zugang zu dem Kraftfahrzeug wünscht.The circuit arrangement 1 is part of a transceiver device used in a motor vehicle (not shown) for carrying out a keyless access authorization check. This control system also includes at least one ID transmitter, from which a wake-up signal is sent for the subsequent implementation of a question-answer dialog for the access authorization control if the person wearing this ID transmitter wishes to have access to the motor vehicle.
In seinem Ruhemodus, bei dem in der Regel der Motor des Kraftfahrzeuges ausgeschaltet ist, befindet sich der Empfänger 3 in einem Polling-Be- trieb, bei welchem dieser zwischen seinem empfangsbereiten Betriebszustand und seinem nicht betriebsbereiten Zustand ein- und ausgeschaltet wird. Dabei ist vorgesehen, daß das Verhältnis von Einschaltzeit zu Ausschaltzeit etwa 1 :10 ist. Bei einer angenommenen Stromaufnahme des Empfängers von 5 mA resultiert daraus eine Stromaufnahme von 0,5 mA bezüglich des Empfängerbausteins 3. Der Polling-Betrieb des Empfängers 3 wird durch den ASIC 6 gesteuert. Der ASIC 6 hat eine Eigenstromaufnahme von weniger als 0,1 mA. Der Polling-Betrieb des Empfängers 3 ist in dem in Figur 2 dargestellten Flußdiagramm in den beiden oberen Kästchen dargestellt. Der Mikroprozessor 2 befindet sich während dieses Betriebes des ASIC 6 bzw. des Empfängers 3 in seinem Ruhe- bzw. Stand-by-Modus. Die E/A-Schnittstelle 5 des ASIC 6 ist als Ausgang geschaltet, dessen Pegel hoch ist. Wird innerhalb eines Zeitintervalles, in dem der Empfänger 3 empfangsbereit ist, ein gültiges Datenformat empfangen, dann wird in einem ersten Schritt der Polling-Betrieb des Empfängers 3 unterbrochen, wobei dieser empfangsbereit geschaltet verbleibt. Durch das Verbleiben des Empfän- gers 3 in seinem empfangsbereiten Zustand kann dieser nunmehr ein in einem Datentelegramm enthaltenes Codewort empfangen. Zur Reduzierung der Empfangszeit des Codewortes kann vorgesehen sein, daß das Codewort als Präambel eines längeren bzw. umfangreicheren Datentelegramms und somit an seinem Anfang gesendet wird. Es kann auch vorgesehen sein, die Präambel mehrfach in dem Datentelegramm zu senden. Dies empfiehlt sich insbesondere dann, wenn längere Datentelegramme gesendet werden sollen. Nach dem Senden der Präambel ist in dem Datentelegramm zweckmäßigerweise eine Codierung hinsichtlich der Position der Präambel in dem Datentelegramm angegeben. Die sich daraus ergebenden Vorteile führen zu einer Reduzierung der Einschaltdauer des Empfängers. Zum einen braucht der Empfänger nicht zum Empfang des gesamten Datentelegrammes zum Erkennen des Codewortes (Präambel) angeschaltet sein, sondern nur über die Länge eines Datentelegrammabschnittes. Die Einschaltdauer des Empfängers braucht zum anderen zum Empfang des gesamten Datentelegrammes nur eine Datentelegrammlänge betragen, da auch bei dem Beginn des Empfangs eines Datentelegrammes, beispielsweise in seiner zweiten Präambelposition durch die anschließende Codierung eine Sortierung des empfangenen Datentelegrammes bezüglich seiner Bestandteile möglich ist, so daß dieses anschließend bestimmungsgemäß ausgewertet werden kann. Ist kein Codewort bzw. kein gültiges Codewort in dem Datentelegramm enthalten, wird vom ASIC 6 der Empfänger 3 wieder in den Polling-Betrieb geschaltet. Wird in dem gesendeten Datentelegramm nach einer Erkennung des gültigen Datenformates auch das gültige Codewort erkannt, dann wird der Empfänger 3 dauerhaft in seinen empfangsbereiten Betriebszustand geschaltet und der Pegel der E/A-Schnittstelle 5 des ASIC 6 auf tief gezogen. Durch die Pegeländerung dieser Schnittstelle 5 wird mittels der fallende Flanke ein Interrupt an dem Mikroprozessor 2 ausgegeben. Durch dieses Interrupt-Signal wird der Mikroprozessor 2 geweckt und in seinen Betriebszustand gebracht. Der ASIC 6 schaltet seine E/A-Schnittstelle 5 dann als Eingang. Die weitere Auswertung des Datentelegrammes übernimmt der betriebsbereite Mikroprozessor 2. Ist das Datentelegramm ausgewertet und sind alle Aktionen ausgeführt, was gegebenenfalls auch einen bidirektionalen Frage-Antwort-Dialog umfassen kann, nimmt der ASIC 6 durch einen von dem Mikroprozessor 2 getriggerten Reset-Impuls wieder seinen Betrieb auf und steuert den Empfänger 3 wiederum in seinem Polling-Betrieb. Die E/A-Schnittstelle 5 ist dann wiederum als Ausgang mit einem hohen Pegel geschaltet.In its idle mode, in which the motor of the motor vehicle is generally switched off, the receiver 3 is in a polling mode, in which it is switched on and off between its operational state ready to receive and its non-operational state. It is provided that the ratio of switch-on time to switch-off time is approximately 1:10. If the current consumption of the receiver is assumed to be 5 mA, this results in a current consumption of 0.5 mA with respect to the receiver module 3. The polling operation of the receiver 3 is controlled by the ASIC 6. The ASIC 6 has a self-consumption of less than 0.1 mA. The polling operation of the receiver 3 is shown in the flow chart shown in FIG. 2 in the two boxes above. The microprocessor 2 is in this idle or standby mode during this operation of the ASIC 6 or the receiver 3. The I / O interface 5 of the ASIC 6 is connected as an output, the level of which is high. If a valid data format is received within a time interval in which the receiver 3 is ready to receive, the polling operation of the receiver 3 is interrupted in a first step, the receiver 3 remaining switched to ready to receive. By the receiver 3 remaining in its ready-to-receive state, the latter can now receive a code word contained in a data telegram. To reduce the reception time of the code word it can be provided that the code word is sent as a preamble to a longer or more extensive data telegram and thus at the beginning. Provision can also be made to send the preamble several times in the data telegram. This is particularly recommended if longer data telegrams are to be sent. After the preamble has been sent, a coding with regard to the position of the preamble in the data telegram is expediently specified in the data telegram. The resulting advantages lead to a reduction in the duty cycle of the receiver. On the one hand, the receiver does not need to be switched on to receive the entire data telegram to recognize the code word (preamble), but only over the length of a data telegram section. On the other hand, the on-time of the receiver only needs to be one data telegram length to receive the entire data telegram, since even at the beginning of the reception of a data telegram, for example in its second preamble position, the encoding of the received data telegram with respect to its components is possible, so that this can be done can then be evaluated as intended. If no code word or no valid code word is contained in the data telegram, the receiver 3 is switched back to polling mode by the ASIC 6. If the valid code word is also recognized in the transmitted data telegram after recognition of the valid data format, then the receiver 3 is switched permanently to its ready-to-receive operating state and the level of the I / O interface 5 of the ASIC 6 is pulled low. Due to the level change of this interface 5, an interrupt is output to the microprocessor 2 by means of the falling edge. The microprocessor 2 is awakened by this interrupt signal and brought into its operating state. The ASIC 6 then switches its I / O interface 5 as an input. The operational microprocessor 2 takes over the further evaluation of the data telegram. Is the data telegram evaluated and are all Actions performed, which may also include a bidirectional question-answer dialog, the ASIC 6 resumes operation by a reset pulse triggered by the microprocessor 2 and controls the receiver 3 again in its polling mode. The I / O interface 5 is then in turn connected as an output with a high level.
Der beim Betrieb dieses Verfahrens anfallende Stromverbrauch ist schematisiert in dem Diagramm der Figur 3 summarisch dargestellt, bei dem die x-Achse die Zeitachse ist und bei dem auf der y-Achse der Stromverbrauch [mA] aufgetragen ist. Aus diesem Diagramm wird deutlich, daß der ASIC 6 zum Steuern des Polling-Betriebs des Empfängers 3 sowie zum Erkennen eines Datenformates eines empfangenen Datentelegramms und eines darin enthaltenen Codewortes nur eine sehr geringe Stromaufnahme aufweist. Nur in den Zeitintervallen, in denen durch den Polling-Betrieb der Empfänger 3 empfangsbereit ist, erhöht sich der Stromverbrauch um die von dem Empfänger 3 benötigte Strommenge. In dem dargestellten Ausführungsbeispiel beträgt diese etwa 5 mA. Bei Empfang eines gültigen Datenformates bleibt der Stromverbrauch durch eine längere Einschaltzeit des Empfängers 3 zunächst gleichbleibend entsprechend einem Stromverbrauch resultierend aus dem Betrieb des Empfängers 3 sowie des ASIC 6. Ist in dem empfangenen Datentelegramm ein gültiges Codewort von dem ASIC 6 erkannt worden, wird wie oben beschrieben, der Mikroprozessor 2 geweckt, so daß sich dieser in seinem betriebsbereiten Zustand befindet und somit auch ein entsprechender Stromverbraucher ist. Der Stromverbrauch eines solchen Mikroprozessors überschreitet im allgemeinen den Stromverbrauch des Empfängers. Ist der Mikroprozessor 2 betriebsbereit, befindet sich der ASIC 6 im ausgeschalteten Zustand, so daß der Gesamtstromverbrauch der Schaltungsanordnung 1 um den Stromverbrauch des ASIC 6 reduziert ist. Nachdem von dem Mikroprozessor 3 die Schaltungsanordnung 1 durch ein Reset wieder auf den durch den ASIC 6 gesteuerten Polling-Betrieb des Empfängers 3 geschaltet ist, stellt sich der Stromverbrauch so dar, wie in der Figur 3 bis zum Empfang eines gültigen Datenformates wiedergegeben.The current consumption resulting from the operation of this method is schematically summarized in the diagram in FIG. 3, in which the x-axis is the time axis and in which the current consumption [mA] is plotted on the y-axis. It is clear from this diagram that the ASIC 6 has only a very low power consumption for controlling the polling operation of the receiver 3 and for recognizing a data format of a received data telegram and a code word contained therein. Only in the time intervals in which the polling operation of the receiver 3 is ready to receive does the power consumption increase by the amount of power required by the receiver 3. In the illustrated embodiment, this is approximately 5 mA. Upon receipt of a valid data format, the power consumption initially remains constant due to a longer switch-on time of the receiver 3, corresponding to a power consumption resulting from the operation of the receiver 3 and of the ASIC 6. If a valid code word has been recognized by the ASIC 6 in the received data telegram, the procedure is as above described, the microprocessor 2 awakened so that it is in its operational state and is therefore also a corresponding power consumer. The power consumption of such a microprocessor generally exceeds the power consumption of the receiver. If the microprocessor 2 is ready for operation, the ASIC 6 is in the switched-off state, so that the total current consumption of the circuit arrangement 1 is reduced by the current consumption of the ASIC 6. After the circuit arrangement 1 has been switched back to the polling operation of the receiver 3 controlled by the ASIC 6 by the microprocessor 3, the current consumption is as shown in FIG. 3 until a valid data format is received.
In einem weiteren Ausführungsbeispiel ist vorgesehen, daß der ASIC dergestalt ausgebildet ist, daß die Ausschaltdauer des Empfängers variabel einstellbar ist. Durch diese Maßnahme läßt sich die Reaktionszeit und der Stromverbrauch des Systems anwendungsspezifisch, etwa tageszeitabhängig frei wählen. Ebenfalls kann vorgesehen sein, die Betriebsart des ASIC dahingehend zu verändern, daß die erste Weckstufe - die Datenformaterkennung - mit unterschiedlich vielen Bit vorgenommen werden soll. Mit Hilfe dieser Einstellung läßt sich die Priorität und auch die Reaktionszeit des Systems anwendungsspezifisch einstellen. Ferner kann vorgesehen sein, daß zur Erhöhung der Reaktionsgeschwindigkeit des Systems der oder die Oszillatoren des Prozessors eingeschaltet bleiben, auch wenn der Prozessor in seinem Stand-by-Modus heruntergefahren ist. Die Oszillatoren benötigen nur einen Bruchteil der Strommenge des gesamten Prozessors. In a further embodiment it is provided that the ASIC is designed such that the switch-off time of the receiver is variably adjustable. With this measure, the response time and the power consumption of the system can be freely selected depending on the application, for example depending on the time of day. Provision can also be made to change the operating mode of the ASIC so that the first wake-up stage - the data format detection - is to be carried out with different numbers of bits. With this setting, the priority and the response time of the system can be set application-specifically. It can further be provided that the processor's oscillator (s) remain switched on to increase the system's response speed, even when the processor is shut down in its standby mode. The oscillators use only a fraction of the total amount of power in the entire processor.
Zusammenstellung der BezugszeichenCompilation of the reference symbols
Elektronische Schaltungsanordnung Mikroprozessor Empfänger Antenne E/A-Schnittstelle ASIC Electronic circuit arrangement microprocessor receiver antenna I / O interface ASIC

Claims

Patentansprüche claims
1. Verfahren zum Einschalten eines elektrisch betriebenen, stromver- brauchenden Bauelements aus einem Ruhemodus in seinen Arbeitsmodus, welches Einschalten des Bauelements durch den Eingang eines die Information zum Wecken des Bauelements beinhaltendes Dateπtelegramm getπggert wird, dadurch gekennzeichnet, daß die zum Wecken des Bauelements (2) bestimmte Information in einem Datentelegramm kumulativ aus einem bestimmten Datenformat und einem in dem Datentelegramm enthaltenen Codewort besteht, wobei in einem ersten Schritt das Datenformat des Datentelegramms auf seine Gültigkeit hin überprüft wird und wobei sich an diesen Schritt, wenn das empfangene Daten- format als das gültige erkannt worden ist, eine Überprüfung des1. A method for switching on an electrically operated, power-consuming component from a sleep mode into its working mode, which switching on of the component is received by the receipt of a data telegram containing the information for waking the component, characterized in that the for waking the component (2 ) certain information in a data telegram consists cumulatively of a certain data format and a code word contained in the data telegram, the validity of the data format of the data telegram being checked in a first step and taking this step if the received data format as that valid has been recognized, a review of the
Datentelegramms auf das Vorhandensein eines zum Wecken des Bauelements (2) gültigen Codewortes anschließt, wobei das strom- verbraucheπde Bauelement (2) in seinen Arbeitsmodus geschaltet wird, wenn das Codewort in dem Datentelegramm enthalten und als das gültige zum Wecken des Bauelements erkannt worden ist.Data telegram follows the presence of a code word valid for waking the component (2), the power-consuming component (2) being switched to its working mode when the code word is contained in the data telegram and has been recognized as the valid one for waking the component.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß das Verfahren im Rahmen einer schlussellosen Zugangsberechtigungskontrolle für ein Kraftfahrzeug eingesetzt wird, bei dem das Wecksignals über eine Funkstrecke zum Wecken eines als stromverbrauchendes Bauelement vorgesehenen Prozessors (2) gesendet wird und von einem dem Prozessor (2) vorgeschalteten Empfanger (3) empfangen wird , welcher Empfanger (3) zyklisch zwischen seinem empfaπgsbereiten und seinem ausgeschalteten Mo- dus hin- und hergeschaltet wird (Polling-Betrieb), wobei die Steuerung des Polling-Betπebs des Empfangers (3), die Überprüfung eines empfangenen Datentelegramms bezuglich seines Datenformats und eines dann enthaltenen Codeworts von einer auf diese spezifischen Applikationen gerichteten spezifischen Schaltung (6) vorgenommen wird und wobei nach Empfangen eines gültigen2. The method according to claim 1, characterized in that the method is used in the context of a keyless access authorization control for a motor vehicle, in which the wake-up signal is sent over a radio link to wake up a processor (2) provided as a power-consuming component and from a processor ( 2) upstream receiver (3) is received, which receiver (3) is cyclically switched between its ready-to-receive mode and its switched-off mode (polling mode), with the control of the polling mode of the receiver (3) which A received data telegram is checked with regard to its data format and a code word then contained by a specific circuit (6) directed to these specific applications, and after receiving a valid one
Datenformats der Polling-Betrieb des Empfangers (3) unterbrochen und der Empfänger (3) empfangsbereit geschaltet bleibt Data format the polling operation of the receiver (3) is interrupted and the receiver (3) remains switched to receive
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Phasen, in denen sich der Empfänger (3) im ausgeschalteten Modus befindet, zeitlich um ein Mehrfaches länger sind als diejenigen Phasen, in denen der Empfänger (3) empfangsbereit ist.3. The method according to claim 2, characterized in that the phases in which the receiver (3) is in the switched-off mode are several times longer than those phases in which the receiver (3) is ready to receive.
4. Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß der Prozessor (2) durch einen von dem applikationsspezifischen Schaltkreis (6) erzeugten Interrupt von seinem Ruhemodus in seinen Betriebsmodus geschaltet wird.4. The method according to claim 2 or 3, characterized in that the processor (2) is switched from its idle mode to its operating mode by an interrupt generated by the application-specific circuit (6).
5. Elektronische Schaltungsanordnung zum Beaufschlagen eines elektrisch betriebenen, stromverbrauchenden Bauelements mit Wecksignalen umfassend eine Empfangseinrichtung zum Empfangen eines Wecksignals, deren Ausgang an den Eingang des Bauelements angeschlossen ist, dadurch gekennzeichnet, daß der Schaltungsanordnung (1 ) ein appiikationsspezifischer Schaltkreis (6) zum Betreiben eines Empfängers (3) in einem Polling-Betrieb sowie zum Erkennen des über den Empfänger (3) eingehenden Datentelegramms hinsichtlich seines Datenformats und eines darin enthaltenen Codewortes zugeordnet ist, welcher5. Electronic circuit arrangement for supplying an electrically operated, current-consuming component with wake-up signals comprising a receiving device for receiving a wake-up signal, the output of which is connected to the input of the component, characterized in that the circuit arrangement (1) is an application-specific circuit (6) for operating a Receiver (3) in a polling mode and for recognizing the incoming data telegram via the receiver (3) with regard to its data format and a code word contained therein, which
Schaltkreis (6) mittels einer E/A-Schnittstelle (5) an den Empfänger (3) und den Interrupt-Eingang des Bauelements (2) angeschlossen ist.Circuit (6) is connected to the receiver (3) and the interrupt input of the component (2) by means of an I / O interface (5).
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß das Bauelement ein Prozessor, insbesondere ein Mikroprozessor (2) ist.6. The device according to claim 5, characterized in that the component is a processor, in particular a microprocessor (2).
7. Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß der applikationsspezifische Schaltkreis ein integrierter Schaltkreis (ASIC) (6) ist. 7. The device according to claim 5 or 6, characterized in that the application-specific circuit is an integrated circuit (ASIC) (6).
PCT/EP1999/005053 1998-07-17 1999-07-15 Method for switching on an electrically operated current-consuming component, and electronic circuit configuration WO2000004517A1 (en)

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DE19832203A DE19832203A1 (en) 1998-07-17 1998-07-17 Activating electrically operated, current-consuming component through code word contained in data message of predetermined format

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