5
5-13
Ver.0.10
(2) ILEVEL (Interrupt Priority Level) (D5-D7 or D13-D15)
These bits set the priority levels of interrupt requests from each internal peripheral I/O. Set
priority level 7 to disable interrupts from some internal peripheral I/O or priority levels 0-6 to
enable interrupts.
When an interrupt occurs, the interrupt controller resolves priority between this interrupt and
other interrupt sources based on ILEVEL settings and finally compares its priority with the IMASK
value to determine whether to forward an EI request to the CPU or keep it pending.
The table below shows the relationship between ILEVEL settings and the IMASK values at which
interrupts are accepted.
Table 5.3.1 ILEVEL Settings and Accepted IMASK Values
ILEVEL values set
IMASK values at which interrupts are accepted
0 (ILEVEL="000")
Accepted when IMASK is 1-7
1 (ILEVEL="001")
Accepted when IMASK is 2-7
2 (ILEVEL="010")
Accepted when IMASK is 3-7
3 (ILEVEL="011")
Accepted when IMASK is 4-7
4 (ILEVEL="100")
Accepted when IMASK is 5-7
5 (ILEVEL="101")
Accepted when IMASK is 6-7
6 (ILEVEL="110")
Accepted when IMASK is 7
7 (ILEVEL="111")
Not accepted (interrupts disabled)
INTERRUPT CONTROLLER (ICU)
5.3 ICU-Related Registers
Содержание M32170F3VFP
Страница 19: ...CHAPTER 1 CHAPTER 1 OVERVIEW 1 1 Outline of the 32170 1 2 Block Diagram 1 3 Pin Function 1 4 Pin Layout ...
Страница 42: ...1 1 24 Ver 0 10 OVERVIEW 1 4 Pin Layout This is a blank page ...
Страница 56: ...2 2 14 Ver 0 10 This is a blank page ...
Страница 88: ...3 3 32 Ver 0 10 ADDRESS SPACE 3 7 Notes on Address Space This is a blank page ...
Страница 192: ...6 6 58 Ver 0 10 INTERNAL MEMORY 6 9 Precautions to Be Taken When Rewriting Flash Memory This is a blank page ...
Страница 270: ...9 9 40 Ver 0 10 DMAC 9 4 Precautions about the DMAC This is a blank page ...
Страница 498: ...10 10 228 Ver 0 10 MULTIJUNCTION TIMERS 10 9 TOM Output related 16 bit Timer This is a blank page ...
Страница 550: ...11 11 52 Ver 0 10 A D CONVERTERS 11 4 Precautions on Using A D Converters This is a blank page ...
Страница 614: ...12 12 64 Ver 0 10 This is a blank page SERIAL I O 12 9 Precautions on Using UART Mode ...
Страница 710: ...14 14 16 Ver 0 10 REAL TIME DEBUGGER RTD 14 4 Typical Connection with the Host This is a blank page ...
Страница 746: ...16 16 20 Ver 0 10 WAIT CONTROLLER 16 3 Typical Operation of the Wait Controller This is a blank page ...
Страница 756: ...17 17 10 Ver 0 10 RAM BACKUP MODE 17 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Страница 757: ...CHAPTER 18 CHAPTER 18 OSCILLATION CIRCUIT 18 1 Oscillator Circuit 18 2 Clock Generator Circuit ...
Страница 762: ...18 18 6 Ver 0 10 OSCILLATION CIRCUIT 18 2 Clock Generator Circuit This is a blank page ...
Страница 798: ...19 19 36 Ver 0 10 JTAG 19 6 Precautions about Board Design when Connecting JTAG This is a blank page ...
Страница 830: ...21 21 24 Ver 0 10 PRELIMINARY PRELIMINARY This is a blank page ELECTRICAL CHARACTERISTICS 21 5 AC Characteristics ...
Страница 831: ...CHAPTER 22 CHAPTER 22 TYPICAL CHARACTERISTICS 22 1 A D Conversion Characteristics ...
Страница 833: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Страница 837: ...Appendix 2 1 32170 Instruction Processing Time APPENDIX 2 APPENDIX 2 INSTRUCTION PROCESSING TIME ...
Страница 841: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...