Semiconductor data processing device, time-triggered communication system, and communication system

Patent metadata

Field	Value
Publication number	US-9047262-B2
Application number	US-201213666836-A
Country	US
Kind code	B2
Filing date	Nov 1, 2012
Priority date	Nov 2, 2011
Publication date	Jun 2, 2015
Grant date	Jun 2, 2015

Abstract

The variation of the timing of starting interrupt processing in response to a timer interrupt request is reduced regardless of the condition of processing of other interrupts. A semiconductor data processing device incorporated in each of plural electronic control devices coupled to a network for time-triggered communication system is provided with a central processing unit, a communication control circuit and an interrupt control circuit. The communication control circuit has a local time timer for use in time-triggered communication and issues, based on time counting by the local time timer, a timer interrupt request for time-triggered communication. When a timer interrupt request for time-triggered communication is received, the interrupt control circuit performs control to cause the central processing unit to delay, by a predetermined reservation time, starting the interrupt processing to be performed in response to the timer interrupt request.

First claim

What is claimed is:

1. A semiconductor data processing device comprising:
a central processing unit for executing commands;
a communication control circuit for performing communication control for time-triggered communication; and
an interrupt control circuit for performing interrupt control to cause the central processing unit to perform processing in response to an interrupt request,
wherein the communication control circuit has a local time timer configured for time-trigg…

Assignees

• Renesas Electronics Corp

Inventors

• Fujii Makoto

Classifications

• G06F13/24 Primary

  Physics · mapped topic