Semiconductor device
AssigneeRenesas Electronics Corporation
InventorSusumu Hirata
Life of this patent
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Abstract
An interrupt reception unit receives an interrupt request. In response to a received interrupt request, an interrupt processing unit performs an interrupt process of a first priority or an interrupt process of a second priority having a lower priority than the first priority. An interrupt suppression control unit controls the number of interrupt processes of the second priority processed by the interrupt processing unit in a cycle time according to a suppression condition. The suppression condition is set on the basis of a cycle in which the interrupt process of the second priority occurs and the total number of the interrupt processes of the second priority occurring within a period corresponding to the cycle.
Claims12
A semiconductor device circuit comprising:
- a main processing unit that is configured to start up a main process every start of a cycle time;
- a plurality of communication interfaces that is coupled to a communication bus and is configured to output an interrupt request;
- an interrupt reception unit that is configured to receive the interrupt request;
- an interrupt processing unit that is configured to perform an interrupt process including an interrupt process of a first priority and an interrupt process of a second priority having a lower priority than the first priority, the interrupt processing unit being configured to perform, in response to the interrupt request received by the interrupt reception unit, the interrupt process of the first priority or the interrupt process of the second priority;
- and
- an interrupt suppression control unit that is configured to control a number of the interrupt processes of the second priority processed by the interrupt processing unit in the cycle time, according to a first suppression condition set on a basis of a cycle in which the interrupt process of the second priority occurs and a total number of the interrupt processes of the second priority occurring within a period corresponding to the cycle.
Dependencies are inferred from the claim text.