JPS57138447A - Memory device for vehicle - Google Patents

Memory device for vehicle

Info

Publication number
JPS57138447A
JPS57138447A JP2150381A JP2150381A JPS57138447A JP S57138447 A JPS57138447 A JP S57138447A JP 2150381 A JP2150381 A JP 2150381A JP 2150381 A JP2150381 A JP 2150381A JP S57138447 A JPS57138447 A JP S57138447A
Authority
JP
Japan
Prior art keywords
vehicle
output
data
becomes
circuit
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP2150381A
Other languages
Japanese (ja)
Inventor
Hidetaka Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP2150381A priority Critical patent/JPS57138447A/en
Publication of JPS57138447A publication Critical patent/JPS57138447A/en
Pending legal-status Critical Current

Links

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
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
    • G07C5/0841—Registering performance data
    • G07C5/085—Registering performance data using electronic data carriers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To prevent vehicle data from being erased when a battery is disconnected, by transferring the data from a volatile memory to a nonvolatile memory when it is found out that the battery is to be disconnected or when a prescribed time has elapsed since the stoppage of the vehicle. CONSTITUTION:When a vehicle is stopped, an inversion output Q' becomes a high level H and the output of an OR circuit 7 also becomes a high level H after the lapse of a time T since the entry of the last vehicle speed pulse from a vehicle speed sensor C into a multivibrator 2b. As a result, a controller 5 detects the beginning of the rise in the output of the OR circuit 7 to transfer the data of a volatile memory 4 to a nonvolatile memory 6. Even if a battery 1 is disconnected within the time T after the stoppage, the output of a power detector 2a becomes a high level. As a result, the output of the OR circuit 7 becomes the high level so that the data of the volatile memory 4 is transferred to the nonvolatile memory 6. When the vehicle is running, the inversion output Q' of the multivibrator 2b has a low level and the power detector 2a is open. As a result, both the inputs to the OR circuit 7 become a low level so that the data are not transferred.
JP2150381A 1981-02-18 1981-02-18 Memory device for vehicle Pending JPS57138447A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2150381A JPS57138447A (en) 1981-02-18 1981-02-18 Memory device for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2150381A JPS57138447A (en) 1981-02-18 1981-02-18 Memory device for vehicle

Publications (1)

Publication Number Publication Date
JPS57138447A true JPS57138447A (en) 1982-08-26

Family

ID=12056766

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2150381A Pending JPS57138447A (en) 1981-02-18 1981-02-18 Memory device for vehicle

Country Status (1)

Country Link
JP (1) JPS57138447A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0209160A2 (en) * 1985-07-19 1987-01-21 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Contact device for motor vehicles
US4912471A (en) * 1983-11-03 1990-03-27 Mitron Systems Corporation Interrogator-responder communication system
US5070481A (en) * 1985-08-17 1991-12-03 Robert Bosch Gmbh Coordinated circuit for supplying power from a d-c source to a microcomputer and its semiconductor memories

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4912471A (en) * 1983-11-03 1990-03-27 Mitron Systems Corporation Interrogator-responder communication system
EP0209160A2 (en) * 1985-07-19 1987-01-21 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Contact device for motor vehicles
US5070481A (en) * 1985-08-17 1991-12-03 Robert Bosch Gmbh Coordinated circuit for supplying power from a d-c source to a microcomputer and its semiconductor memories

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