M16C29 Datasheet, PDF (10/499 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/Tiny SERIES

9. Interrupts ___________________________________________________ 70
9.1 Type of Interrupts ............................................................................................................ 70
9.1.1 Software Interrupts ................................................................................................... 71
9.1.2 Hardware Interrupts ................................................................................................. 72
9.2 Interrupts and Interrupt Vector ........................................................................................ 73
9.2.1 Fixed Vector Tables .................................................................................................. 73
9.2.2 Relocatable Vector Tables ........................................................................................ 74
9.3 Interrupt Control .............................................................................................................. 75
9.3.1 I Flag ........................................................................................................................ 78
9.3.2 IR Bit ........................................................................................................................ 78
9.3.3 ILVL2 to ILVL0 Bits and IPL...................................................................................... 78
9.4 Interrupt Sequence ......................................................................................................... 79
9.4.1 Interrupt Response Time .......................................................................................... 80
9.4.2 Variation of IPL when Interrupt Request is Accepted ............................................... 80
9.4.3 Saving Registers ...................................................................................................... 81
9.4.4 Returning from an Interrupt Routine ......................................................................... 83
9.5 Interrupt Priority .............................................................................................................. 83
9.5.1 Interrupt Priority Resolution Circuit .......................................................................... 83
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9.6 INT Interrupt ................................................................................................................... 85
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9.7 NMI Interrupt ................................................................................................................... 86
9.8 Key Input Interrupt .......................................................................................................... 86
9.9 CAN0 Wake-up Interrupt ................................................................................................ 87
9.10 Address Match Interrupt ............................................................................................... 87
10. Watchdog Timer ____________________________________________ 89
10.1 Count Source Protective Mode ..................................................................................... 90
11. DMAC ____________________________________________________ 91
11.1 Transfer Cycles ............................................................................................................ 96
11.1.1 Effect of Source and Destination Addresses ......................................................... 96
11.1.2 Effect of Software Wait .......................................................................................... 96
11.2. DMA Transfer Cycles ................................................................................................... 98
11.3 DMA Enable .................................................................................................................. 99
11.4 DMA Request ................................................................................................................ 99
11.5 Channel Priority and DMA Transfer Timing ................................................................ 100
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