Renesas Electronics Corporation

Masamitsu Muratani

Tomohiko Ohtsu

Taku Fujiwara

Hiroshi Yagi

Kazuki Onda

A semiconductor device and the like for maintaining a required function while suppressing unauthorized accesses are provided. The semiconductor deviceincludes a main control deviceand a sub-control device. The main control deviceincludes a main memoryfor storing main programs for receiving external signals, and a trigger signal output circuitfor outputting a trigger signal when an abnormal signal process differs from preset signal processing is performed. The sub-control deviceis coupled to the main control device, and includes a trigger signal obtaining circuitfor obtaining a trigger signal, and a sub-program outputting circuitfor outputting a sub-program to the main control devicebased on the obtained trigger signal.

Semiconductor device, semiconductor system and program

When a state of a radio communication device corresponds to a predetermined state, a communication control unit operates in the first mode to communicate according to the BLE standard, while when the radio communication device does not receive connect request packets, the communication control unit operates in the second mode to communicate. A rewrite switching unit switches to a rewritable state when the communication control unit operates in the first mode and to a rewriting prohibited state when the communication control unit operates in the second mode. The first mode is a mode for updating. In the first mode, the communication control unit transmits a notification for limiting the communication to the updating in an establishment process of the communication. The second mode is a mode for performing processing other than the updating. In the second mode, the communication control unit does not transmit the notification.

Growing community of inventors

Tokyo, Japan

Masamitsu Muratani