4
4-18
Ver.0.10
4.9.3 External Interrupt (EI)
An external interrupt is generated upon an interrupt request which is output by the 32170's internal
interrupt controller. The interrupt controller manages interrupt requests by assigning each one of
seven priority levels. For details, refer to Chapter 5, "Interrupt Controller." For details about the
interrupt sources, refer to each section in which the relevant internal peripheral I/O is described.
[Occurrence Conditions]
External interrupts are managed based on interrupt requests from each internal peripheral I/O by
the 32170's internal interrupt controller. These interrupt requests are notified to the M32R CPU
by the interrupt controller. The M32R/E checks these interrupt requests at a break in instructions
residing on word boundaries, and when an interrupt request is detected and the PSW register IE
flag = 1, accepts it as an external interrupt.
In no case will an external interrupt be activated immediately after executing a 16-bit instruction
that starts from a word boundary. (For 16-bit branch instructions, however, the interrupt may be
accepted immediately after branching.)
Figure 4.9.2 Timing at Which External Interrupt (EI) is Accepted
16-bit instruction
Order in which instructions are executed
Address 1000
Interrupt may
be accepted
Interrupt
cannot be
accepted
Address 1002
Address 1004
Address 1008
16-bit instruction
32-bit instruction
Interrupt may
be accepted
Interrupt may
be accepted
EIT
4.9 Interrupt Processing
Summary of Contents for M32170F3VFP
Page 42: ...1 1 24 Ver 0 10 OVERVIEW 1 4 Pin Layout This is a blank page ...
Page 56: ...2 2 14 Ver 0 10 This is a blank page ...
Page 88: ...3 3 32 Ver 0 10 ADDRESS SPACE 3 7 Notes on Address Space This is a blank page ...
Page 270: ...9 9 40 Ver 0 10 DMAC 9 4 Precautions about the DMAC This is a blank page ...
Page 614: ...12 12 64 Ver 0 10 This is a blank page SERIAL I O 12 9 Precautions on Using UART Mode ...
Page 756: ...17 17 10 Ver 0 10 RAM BACKUP MODE 17 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Page 762: ...18 18 6 Ver 0 10 OSCILLATION CIRCUIT 18 2 Clock Generator Circuit This is a blank page ...
Page 831: ...CHAPTER 22 CHAPTER 22 TYPICAL CHARACTERISTICS 22 1 A D Conversion Characteristics ...
Page 833: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Page 841: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...