Renesas Electronics Corporation

Renesas Technology Corp.

Yoichi Katsuki

Koichiro Ishibashi

Hiroyuki Mizuno

Kunio Uchiyama

Susumu Narita

Osamu Nishii

Takanori Shimura

Yonetaro Totsuka

Asako Sekine

The feature of the present invention consists in: a processor main circuit for executing program instruction strings on a processor chip; a substrate bias switching unit for switching voltages of substrate biases applied to a substrate of the processor main circuit; and an operation mode control unit for controlling, in response to the execution of an instruction to proceed to a stand-by mode in the processor main circuit, the substrate bias switching unit in such a way that the biases are switched over to voltages for the stand-by mode, and for controlling, in response to an interruption of the stand-by release from the outside, the substrate bias switching unit in such a way that the biases are switched over to voltages for a normal mode, and also for releasing, after the bias voltages switched thereto have been stabilized, the stand-by of the processor main circuit to restart the operation.

Substrate bias switching unit for a low power processor

Processor for controlling substrate biases in accordance to the operation modes of the processor

Growing community of inventors

Tokyo, Japan

Yoichi Katsuki