5
5-13
Rev.1.0
INTERRUPT CONTROLLER (ICU)
5.3 ICU Related Registers
(2) ILEVEL (interrupt priority level) (D5-D7 or D13-D15)
These bits set the priority level of an interrupt request from each internal peripheral I/O. Set the
priority level to 7 to disable the interrupt from internal peripheral I/O or 0-6 to use the interrupt.
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 relationship between ILEVEL values and the IMASK values at which interrupts are accepted
is shown below.
Table 5.3.1 ILEVEL Settings and the Accepted IMASK Values
LEVEL set value
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 (interrupt disabled)
Содержание 32172
Страница 20: ... This is a blank page 16 ...
Страница 21: ...1 1 Overview 1 2 Block Diagram 1 3 Pin Functions 1 4 Pin Layout CHAPTER 1 CHAPTER 1 OVERVIEW ...
Страница 44: ...1 1 24 Rev 1 0 This is a blank page Overview 1 4 Pin Layout ...
Страница 58: ...2 2 14 Rev 1 0 This is a blank page CPU 2 6 Data Formats ...
Страница 122: ...4 4 26 Rev 1 0 This is a blank page EIT 4 13 Precautions on EIT ...
Страница 200: ...7 7 6 Rev 1 0 This is a blank page RESET 7 4 Precautions to Be Taken Immediately after Reset ...
Страница 240: ...8 8 40 Rev 1 0 This is a blank page INPUT OUTPUT PORTS AND PIN FUNCTIONS 8 5 Precautions on Input Output Ports ...
Страница 298: ...9 9 58 Rev 1 0 This is a blank page DMAC 9 4 Precautions on Using DMAC ...
Страница 416: ...10 10 118 Rev 1 0 This is a blank page INPUT OUTPUT TIMERS 10 6 TOM Output Related 16 bit Timers ...
Страница 658: ...14 14 16 Rev 1 0 REAL TIME DEBUGGER RTD 14 4 Typical Connection with the Host This is a blank page ...
Страница 718: ...16 16 16 Rev 1 0 This is a blank page D A CONVERTERS 16 3 Functional Description of the D A Converters ...
Страница 766: ...18 18 22 Rev 1 0 WAIT CONTROLLER 18 3 Typical Operation of the Wait Controller This is a blank page ...
Страница 776: ...19 19 10 Rev 1 0 RAM BACKUP MODE 19 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Страница 777: ...CHAPTER 20 CHAPTER 20 OSCILLATION CIRCUIT 20 1 Oscillator Circuit 20 2 Clock Generator Circuit ...
Страница 782: ...20 20 6 Rev 1 0 OSCILLATION CIRCUIT 20 2 Clock Generator Circuit This is a blank page ...
Страница 856: ...23 23 26 Rev 1 0 This is a blank page ELECTRICAL CHARACTERISTICS 23 6 AC Characteristics ...
Страница 857: ...24 1 A D Conversion Characteristics CHAPTER 24 CHAPTER 24 STANDARD CHARACTERISTICS ...
Страница 859: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Страница 861: ...Appendix 2 1 M32R E Instruction Processing Time APPENDIX 2 APPENDIX 2 INSTRUCTION PROCESSING TIME ...
Страница 865: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...