ONBOARD APPARATUS, AND ONBOARD COMMUNICATION SYSTEM
First Claim
1. An onboard apparatus comprising:
- a connection portion that connects with an external device mounted to a vehicle, and includes at least a data terminal to input and output a communication data and a control terminal to output a communication availability signal that indicates communication is available or not;
a control block that performs data communication with the external device, which is connected to the connection portion; and
a bus switch that, according to a permission signal, changes a non-conduction state to a conduction state of a transmission path from the control block to the data terminal, wherein a signal level of the permission signal varies when an output of the control block is stabilized after the onboard apparatus starts.
1 Assignment
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Accused Products
Abstract
An onboard apparatus comprising a connection portion, a control block, and a bus switch is provided. The connection portion connects with an external device mounted to a vehicle, and includes at least a data terminal to input and output a communication data and a control terminal to output a communication availability signal that indicates communication is available or not. The control block performs data communication with the external device, which is connected to the connection portion. The bus switch, according to a permission signal, changes a non-conduction state to a conduction state of a transmission path from the control block to the data terminal. A signal level of the permission signal varies when an output of the control block is stabilized after the onboard apparatus starts.
4 Citations
5 Claims
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1. An onboard apparatus comprising:
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a connection portion that connects with an external device mounted to a vehicle, and includes at least a data terminal to input and output a communication data and a control terminal to output a communication availability signal that indicates communication is available or not; a control block that performs data communication with the external device, which is connected to the connection portion; and a bus switch that, according to a permission signal, changes a non-conduction state to a conduction state of a transmission path from the control block to the data terminal, wherein a signal level of the permission signal varies when an output of the control block is stabilized after the onboard apparatus starts. - View Dependent Claims (2, 3, 4, 5)
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Specification