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7906 Datasheet(PDF) 96 Page - Renesas Technology Corp |
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7906 Datasheet(HTML) 96 Page - Renesas Technology Corp |
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96 / 531 page ![]() 7906 Group User’s Manual Rev.2.0 INTERRUPTS 6-17 6.9 Multiple interrupts Fig. 6.9.1 Processing for multiple interrupts Interrupt priority level = 2 Main routine Reset I = 1 IPL = 0 I = 0 Interrupt 1 I = 1 IPL = 3 I = 0 I = 1 IPL = 5 RTI I = 0 IPL = 3 RTI I = 0 IPL = 0 I = 1 IPL = 2 RTI I = 0 IPL = 0 Interrupt 1 Interrupt priority level = 3 This request cannot be accepted because its priority level is lower than the interrupt 1’s one. Interrupt request generated Nesting Time : They are automatically executed. : They must be set by software. I : Interrupt disable flag IPL : Processor interrupt priority level Multiple interrupts Interrupt 2 Interrupt priority level = 5 Interrupt 3 Interrupt 2 Interrupt 3 Interrupt 3 The instruction in the main routine is not executed. |
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