Title:
COMMUNICATION APPARATUS AND VEHICULAR ELECTRONIC CONTROLLER
Document Type and Number:
Japanese Patent JP3896860
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To more precisely locate a failure point of causing a communication error and possibly avoid sending unwanted test data during a communication test.
SOLUTION: ECU 11a, 11b, 11n constitute a vehicular LAN with a transmission line 15. A test control circuit 39 normally outputs a control signal Sa at a level L. A transmitter circuit 37 sends its output signal to the transmission line 15 through a buffer circuit 40 and a transceiver 13, and a receiver circuit 38 receives the signal once returned to a microcomputer 12. If a communication error occurs, the test control circuit 39 outputs a control signal Sa at a level H and a transmitted signal is directly returned to the receiver circuit 38 through a received signal switching circuit 41 while the buffer circuit 40 blocks the transmitted signal from being sent out to the transmission line 15.
More Like This:
| WO/2008/134983 | ACCESS EQUIPMENT AND MASTER-SLAVE FRAME COMMUNICATION METHOD THEREOF |
| JPH04236538 | DATA TRANSMISSION SYSTEM |
Inventors:
Toshihiko Matsuoka
Application Number:
JP2002038256A
Publication Date:
March 22, 2007
Filing Date:
February 15, 2002
Export Citation:
Assignee:
株式会社デンソー
International Classes:
H04L12/40; (IPC1-7): H04L12/40
Domestic Patent References:
| JP5284164A | ||||
| JP11027343A |
Attorney, Agent or Firm:
Tsuyoshi Sato
Previous Patent: VEHICLE CONTROL SYSTEM AND ELECTRONIC CONTROLLER FOR VEHICLE
Next Patent: METHOD AND APPARATUS FOR HYDROTHERMAL REACTION
Next Patent: METHOD AND APPARATUS FOR HYDROTHERMAL REACTION