Patent Number: 8,880,753

Title: Vehicle electronic controller for automatically switching between a port being suspended based on a mode of an internal oscillation circuit

Abstract: Some embodiments relate to a vehicle electronic controller having a microcomputer and a port expansion element, with reduced power consumption and radio noise. An MCU (microcomputer) performs determination processing that determines whether an output condition is established that is based on a signal that is input via a signal input port of the MCU. If the output condition is established, the MCU transmits a signal output instruction to a port expansion element via a communication port, and if not, the instruction is not transmitted. The port expansion element outputs a signal via a signal output port in response to an instruction from the MCU. The port expansion element automatically switches, depending on whether communication via the MCU is being suspended, between operation in a waiting mode in which the internal oscillation circuit is suspended, and operation in a normal mode in which the internal oscillation circuit is operated.

Inventors: Takahashi; Hiroaki (Yokkaichi, JP), Kishida; Takaki (Yokkaichi, JP), Hayashi; Tomohide (Yokkaichi, JP), Hayashi; Tomoya (Yokkaichi, JP)

Assignee: Sumitomo Wiring Systems, Ltd.

International Classification: G06F 15/76 (20060101); G06F 3/00 (20060101)

Expiration Date: 2019-11-04 0:00:00