M16CSLASH29 datasheet(10/499 Pages) RENESAS

10 / 499 page

A-3

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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