| 摘要 |
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.
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