WO2020012928A1 - Dispositif de commande électronique embarqué - Google Patents
Dispositif de commande électronique embarqué Download PDFInfo
- Publication number
- WO2020012928A1 WO2020012928A1 PCT/JP2019/024868 JP2019024868W WO2020012928A1 WO 2020012928 A1 WO2020012928 A1 WO 2020012928A1 JP 2019024868 W JP2019024868 W JP 2019024868W WO 2020012928 A1 WO2020012928 A1 WO 2020012928A1
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- WO
- WIPO (PCT)
- Prior art keywords
- integrated circuit
- voltage level
- communication
- arithmetic
- arithmetic unit
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
Definitions
- the present invention relates to an on-vehicle electronic control device for the purpose of adjusting the signal voltage levels of both communication means in communication within the on-vehicle electronic control device.
- the serial communication represented by the two values of the high-level voltage “1” and the low-level voltage “0” is generally used between the devices in the vehicle-mounted electronic control device.
- an appropriate signal voltage level on the transmission (output) side corresponding to the voltage threshold on the reception (input) side is required. If the signal voltage level between the transmission and the reception does not match, the transmission content cannot be correctly received on the receiving side ("0" and "1" cannot be correctly determined), and the communication is not established.
- a differential method that is resistant to common-mode noise is used for high-speed communication.
- high speed is required for communication from the arithmetic unit to an integrated circuit having a built-in drive unit, and normal high-level and low-level low-speed communication is used from the integrated circuit to the arithmetic unit.
- Patent Document 1 describes serial communication performed between a CAN transceiver and an arithmetic unit.
- TxD is an output signal sent from the arithmetic unit to the CAN transceiver
- RxD is an input signal received by the arithmetic unit from the CAN transceiver.
- These communications correspond to the low-speed communications performed between the devices in the above-mentioned in-vehicle electronic control device.
- the differential communication performed by the CAN transceiver using the CAN bus line with another in-vehicle electronic control device does not correspond to the aforementioned high-speed serial communication performed in the in-vehicle electronic control device.
- the signal voltage level between such a CAN transceiver and the arithmetic unit is set by a Vio pin provided on the CAN transceiver.
- the Vio pin By connecting this Vio pin to the Vcc of the processing unit, the signal voltage level output from the CAN transceiver to the processing unit as RxD is set to the Vcc of the processing unit.
- the signal voltage level of TxD input from the arithmetic unit to the CAN transceiver is Vcc, and the input threshold of the CAN transceiver is set to a value suitable for the Vcc level. In this way, the input and output signal voltage levels of the CAN transceiver and the arithmetic unit are set to appropriate values, so that communication can be performed without any problem.
- the number of pins of the arithmetic unit has increased drastically with the advancement of functions of the arithmetic unit, and a plurality of input / output functions are assigned to one pin. It is difficult to arbitrarily set the signal voltage level of the pin.
- the signal voltage level of a pin used for serial communication is fixed to 5 V or 3.3 V in advance, or a plurality of Vio pins for setting signal voltage levels of a plurality of pins are provided, Either method has been used.
- the problem to be solved by the present invention is to make it possible to arbitrarily set the output signal voltage level on the integrated circuit side of the high-speed serial communication using the differential method for such an arithmetic device that is becoming more sophisticated and complicated. It is to be.
- a switch for switching the output signal voltage level of the high-speed serial communication using the differential method is provided in the integrated circuit, and the switch is used for communication from the arithmetic device. By switching the switch, the output signal voltage level on the integrated circuit side can be set arbitrarily.
- a switch for switching an output signal voltage level of high-speed serial communication using a differential method in an integrated circuit and a pin for switching the switch are provided, and the pin is set to a high level or a low level.
- the output signal voltage level on the integrated circuit side can be arbitrarily set.
- a pin for providing an output signal voltage level for high-speed serial communication using a differential method is provided in an integrated circuit, and an arbitrary power supply voltage is applied to the pin, so that an output signal on the integrated circuit side is provided.
- the voltage level can be set arbitrarily.
- a signal voltage level conversion circuit is provided on an output signal line of high-speed serial communication using a differential method of an integrated circuit, so that a signal voltage level input to an arithmetic unit can be arbitrarily set. Can be.
- the communication with the arithmetic unit can be established by arbitrarily setting the output signal voltage level on the integrated circuit side without providing a new pin on the integrated circuit.
- the output signal voltage level on the integrated circuit side can be arbitrarily set without changing the communication definition between the integrated circuit and the arithmetic device. Communication can be established.
- the signal voltage level input to the arithmetic unit is arbitrarily set only by adding the signal voltage level conversion circuit to establish communication with the arithmetic unit. be able to.
- Circuit configuration diagram of Example 1 Detailed view of voltage switch 103 Circuit configuration diagram of Embodiment 2 Circuit configuration diagram of Embodiment 3 Circuit configuration diagram of Example 4
- Example 5 circuit configuration diagram Example 5 circuit configuration diagram
- the on-vehicle electronic control device 1 is provided with an arithmetic unit 101 and an integrated circuit 102, and both perform high-speed serial communication using a differential system.
- the arithmetic unit 101 performs “”.
- the integrated circuit 102 performs “”.
- the data register 105 performs “”.
- SI + is communicated via the differential input signal line (+) 201
- SI ⁇ is communicated via the differential input signal line ( ⁇ ) from the arithmetic unit 101 to the integrated circuit 102.
- each bias level and signal amplitude are specified in advance, and a device that satisfies the specifications can communicate normally.
- Data input from the integrated circuit 102 to the arithmetic device 101 is SO203 of serial output data represented by high level and low level.
- the output interface 104 of the integrated circuit 102 is provided with a switch 103 for switching the output signal voltage level.
- the switch 103 is provided to switch the connection destination of the output interface 104 to one of VCC33 (3.3 V power supply) and VCC5 (5 V power supply).
- the switch 103 is controlled by a switching signal 204 output from the data register 105.
- the arithmetic device 101 transmits the differential signals SI + 201 and SI-202 to the data register of the integrated circuit 102.
- An output signal voltage level register (not shown) 105 is set to VCC5.
- the switching signal 204 controls the switch 103 to select VCC5, and the output interface 104 is supplied with VCC5.
- the SO203 of the serial output data becomes a signal whose high level is 5 V, and communication with the arithmetic unit 101 is established.
- the switching signal 204 similarly controls the switch 103 to select VCC33, and SO203 of the serial output data is high.
- the signal has a level of 3.3 V, and communication with the arithmetic unit 101 is established.
- the output signal voltage levels are two types, VCC33 (3.3V power supply) and VCC5 (5V power supply) .However, the output signal voltage levels are not limited to these voltage values, but may be different. Any configuration may be used as long as it is set. Further, the present invention is not limited to two types, and may include three or more types of voltage set values. The same applies to the following embodiments.
- the switch element provided in the integrated circuit 102 is controlled based on the input value from the differential signal line, and the voltage level of the internal power supply supplied to the output interface 104 is selected to an arbitrary value. Therefore, the signal voltage level of the SO 203 of the integrated circuit 102 can be arbitrarily set without providing a new pin on the integrated circuit 102. According to the present embodiment, there is a specific effect that communication with various arithmetic devices 101 can be established without increasing the number of pins of the integrated circuit 102.
- Embodiment 2 of the present invention will be described with reference to FIG.
- the switch 103 for switching the output signal voltage level of the output interface 104 of the integrated circuit 102 is controlled by the switching signal 204 output from the data register 105.
- a pin 302 for setting the switching signal 204 is provided as shown in FIG.
- switch 103 selects VCC33 when 5V is applied to pin 302 and VCC5 when 0V (GND) is applied, connecting pin 302 to GND as shown in Fig. SO203 becomes a signal whose high level is 5V, and communication with the arithmetic unit 101 is established.
- connection destination of the pin (terminal) 302 is, for example, a voltage line provided on a substrate on which the integrated circuit 102 and the arithmetic device 101 are mounted.
- the switching control for switching the connection destination of the output interface of the integrated circuit 102 to the first internal power supply (3.3 V) or the second internal power supply (5 V) is performed by changing the switching control to the voltage connected to the pin 302. Since the present invention is implemented in accordance with this, the signal voltage level of SO203 of the integrated circuit 102 can be set arbitrarily without changing the register configuration of the data register 105 of the integrated circuit 102. In the present embodiment, similarly, communication with various arithmetic devices 101 can be established by the same circuit configuration of the integrated circuit.
- the switch 103 for switching the output signal voltage level of the output interface 104 of the integrated circuit 102 is built in the integrated circuit 102.
- the switch 103 is not provided, and the pin 401 for setting the output signal voltage level of the output interface 104 of the integrated circuit 102 is provided.
- the SO203 of the serial output data becomes a signal having a high level of 5V, and the communication with the arithmetic unit 101 is established.
- connection destination of the pin 401 shown in FIG. 4 is changed from VCC5 to VCC33, communication with the arithmetic device 101 is established even when the signal voltage level of the input interface of the arithmetic device 101 is 3.3 V. Will be done.
- connection destination of the pin (terminal) 401 is, for example, a voltage line provided on a substrate on which the integrated circuit 102 and the arithmetic device 101 are mounted.
- the integrated circuit 102 includes the terminal 401 connected to the output interface 104, and the terminal 401 is connected to a voltage equal to the signal voltage level of the input interface 106 of the arithmetic device 101 to perform the arithmetic operation.
- the signal levels of the input interface of the device 101 and the output interface of the integrated circuit 102 are equalized.
- Embodiment 4 of the present invention will be described with reference to FIG.
- the integrated circuit 102 is provided with the diode 501 between the internal power supply VCC33 and the output interface 104.
- the diode 501 is provided so that the direction from the internal power supply VCC33 to the output interface 104 is forward.
- the integrated circuit 102 is provided with a pin (terminal) 401 connected between the diode 501 and the output interface 104.
- VCC33 is given to the output interface 104 via the diode 501, and SO203 of serial output data is output.
- the terminal When the signal voltage level of the input interface 106 of the arithmetic unit 101 is equal to the voltage supplied from the internal power supply VCC33 to the output interface 104 via the diode 501, the terminal is opened to connect the output interface 104 to the input The signal voltage levels of the interface 106 become equal, and communication can be established.
- connection destination of the pin (terminal) 401 is, for example, a voltage line provided on a substrate on which the integrated circuit 102 and the arithmetic device 101 are mounted.
- the signal voltage level of the output interface 104 can be determined depending on whether the pin 401 is open or connected, the appearance inspection becomes easy.
- communication with various arithmetic devices 101 can be established by the same circuit configuration of the integrated circuit.
- Embodiments 1 to 3 show a method of solving the problem by adding new means to the integrated circuit 102, but this embodiment is a solution without changing the integrated circuit 102.
- the output signal voltage level of the output interface 104 of the integrated circuit 102 is fixed to VCC33, and the SO203 of the serial output data is a signal whose high level is 3.3V.
- the power supply voltage pin 301 of the input interface 106 of the arithmetic unit 101 is connected to VCC5, the input interface 106 has a threshold corresponding to a signal voltage level of 5 V, and is a high-level voltage “1”. And low-level voltage “0” may not be correctly identified.
- the signal of the output interface 104 of the integrated circuit 102 is input to the input interface 106 of the arithmetic unit 101 via the signal voltage level conversion circuit 601.
- the signal voltage level conversion circuit 601 can be easily realized by using an AND circuit, an OR circuit, a buffer circuit, or the like of a general-purpose logic IC capable of outputting 5 V corresponding to a 3.3 V input, for example.
- the signal voltage level conversion circuit 601 By using the signal voltage level conversion circuit 601 to convert the high level of SO203, which is the output of the output interface 104 of the integrated circuit 102, from 3.3V to 5V and input the same to the input interface 106 of the arithmetic unit 101, communication is performed. It can be established.
- FIG. 1 A further preferred example is shown using FIG.
- the input of the arithmetic unit 101 is shared not only with the integrated circuit 102 but also with the second integrated circuit 702 and the third integrated circuit 703, in order to avoid collision of output signals, respective signal voltage level conversion circuits are used. It is necessary to provide the 701, 704, and 705 with a function to make the output high impedance.
- ⁇ This function can be easily realized by using a general-purpose logic IC that makes the output not only high-level and low-level voltage but also high impedance. It should be noted that a chip select signal (not shown) output from the arithmetic unit 101 to each of the integrated circuits 101, 702, and 703 may be used as a control signal for setting a high impedance (not shown).
- communication between the two can be established without changing the arithmetic unit 101 or the integrated circuit 102. Further, the input of the arithmetic unit can be shared by a plurality of integrated circuits.
- on-vehicle electronic control unit 101 ... arithmetic unit 102 ... integrated circuit 103 ... switch 104 for switching the output signal voltage level ... output interface 105 of integrated circuit 102 ... data register 106 of integrated circuit 102 ... input interface 201 of arithmetic unit 101 ... differential input signal line (+) 202 ... differential input signal line (-) 203 ... serial output data 204 of the integrated circuit 102 ... switch signal 301 of the switch 103 ... power supply voltage pin 302 of the input interface 106 ...
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Abstract
Lorsque la fonctionnalité d'un dispositif de calcul est augmentée à un niveau élevé, le nombre de broches dans ledit dispositif de calcul augmente de façon significative, et une pluralité de fonctions d'entrée/sortie sont attribuées à une broche unique, et il devient donc difficile d'établir des niveaux de tension de signal pour chaque broche d'entrée/sortie individuelle du dispositif de calcul à volonté. Pour une communication série à grande vitesse utilisant un système différentiel, des niveaux de tension de signal entre des dispositifs sont couramment stipulés à l'avance, et ne peuvent pas être réglés à volonté. La présente invention a pour objet de permettre à un niveau de tension de signal de sortie côté circuit intégré pour une communication série à grande vitesse utilisant un système différentiel d'être réglé à volonté, dans un dispositif de calcul ayant un niveau élevé de fonctionnalité et une complexité accrue.
Priority Applications (1)
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JP2020530073A JP7091456B2 (ja) | 2018-07-13 | 2019-06-24 | 車載電子制御装置 |
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JP2018132854 | 2018-07-13 | ||
JP2018-132854 | 2018-07-13 |
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WO2020012928A1 true WO2020012928A1 (fr) | 2020-01-16 |
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PCT/JP2019/024868 WO2020012928A1 (fr) | 2018-07-13 | 2019-06-24 | Dispositif de commande électronique embarqué |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2016075727A1 (fr) * | 2014-11-14 | 2016-05-19 | ルネサスエレクトロニクス株式会社 | Dispositif à semi-conducteur et son procédé de commande |
WO2017104346A1 (fr) * | 2015-12-15 | 2017-06-22 | セイコーエプソン株式会社 | Dispositif formant circuit, dispositif électro-optique, appareil électronique, corps mobile et procédé de détection d'erreur |
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JP2005018312A (ja) * | 2003-06-25 | 2005-01-20 | Sony Corp | 信号伝送装置および方法、ならびに情報機器 |
CN202422677U (zh) * | 2011-12-30 | 2012-09-05 | 上海博泰悦臻电子设备制造有限公司 | 车载显示系统 |
JP6032247B2 (ja) * | 2013-10-09 | 2016-11-24 | 株式会社デンソー | 歪み補償システム及び通信装置 |
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- 2019-06-24 WO PCT/JP2019/024868 patent/WO2020012928A1/fr active Application Filing
- 2019-06-24 JP JP2020530073A patent/JP7091456B2/ja active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2016075727A1 (fr) * | 2014-11-14 | 2016-05-19 | ルネサスエレクトロニクス株式会社 | Dispositif à semi-conducteur et son procédé de commande |
WO2017104346A1 (fr) * | 2015-12-15 | 2017-06-22 | セイコーエプソン株式会社 | Dispositif formant circuit, dispositif électro-optique, appareil électronique, corps mobile et procédé de détection d'erreur |
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