VEHICLE-MOUNTED DEVICE, AND VEHICLE-MOUNTED COMMUNICATION SYSTEM

摘要

A vehicle-mounted device (2) includes a data terminal (Td, Td) for inputting or outputting communication data (USB+, USB-) and a control terminal (Tc) for outputting a communication possibility signal (USB_ON) indicating a communication possibility, and is provided with a connection unit (21) that is mounted in a vehicle and that connects to an external device (3), and a control block (24) for performing data communication with the external device (3). The vehicle-mounted device (2) is provided with a bus switch (25) for causing a transmission route from the control block (24) to the data terminal (Td, Td) to be changed from a non-conducting state to a conducting state. A vehicle-mounted communication system (1) is provided with the vehicle-mounted device (2) and the external device (3) connected to the connection unit (21).