Keio University

Renesas Electronics Corporation

Hiroki Ishikuro

Tadahiro Kuroda

Shunichi Iwata

Yutaka Takikawa

Yoshihiro Shimizu

Toshihiko Sugahara

Yoichi Takahata

The invention relates to a directional coupling-type multi-drop bus of which the impedance is matched with the bus at the time of coupling so that the speed is increased. A directional coupler is formed when a second module provided with a second coupler end is mounted on a first module provided with a first coupler end, and as a result, the coupling impedance where the proximity effects in the coupling state of the directional coupler are reflected is matched with the impedance of the bus.

Directional coupling-type multi-drop bus

The invention relates to an inter-module communication apparatus where the reflection is reduced so that the communication channel can provide high speed and broadband as compared to inductive coupling. When modules having a signal line terminated with a terminating member and a feedback signal line are layered on top of each other so that the signal lines are coupled to each other and the return signal lines are coupled to each other using capacitive coupling and inductive coupling, the impedance of the terminating members is a coupling impedance that reflects the proximity effects in the coupling state between the modules.

Inter-module communication apparatus

A pulse transmission technique is used for wireless communication between a microcomputer () having a debugging support circuit () and a debugger (). The pulse transmission technique is based on magnetic field coupling between a first coil () provided for the microcomputer and a second coil () coupled with the debugger. During an initialization operation, the microcomputer performs a process of configuring a communication condition of the wireless communication to perform the wireless communication. The microcomputer awaits control from the debugger when the microcomputer establishes communication with the debugger. The debugger awaits establishment of the communication and proceeds to control of the microcomputer in accordance with the wireless communication. It is possible to provide contactless interface for system debugging without the need for a large antenna or a large-scale circuit for modulation and demodulation.

System debugging method, system debugging equipment, processor, wireless-communications interface IC and interface method thereof

Growing community of inventors

Yokohama, Japan

Hiroki Ishikuro