5
5-9
INTERRUPT CONTROLLER (ICU)
32180 Group User’s Manual (Rev.1.0)
5.2 ICU Related Registers
9
10
11
12
13
14
b15)
(b8
1
2
3
4
5
6
b7
b0
ILEVEL
IREQ
0
1
1
1
0
0
0
0
<After reset: H’07>
b
Bit Name
Function
R
W
0–2
No function assigned. Fix to "0"
0
0
(8–10)
3
IREQ
<When edge recognized>
R
W
(11)
Interrupt request bit
At read
0: Interrupt not requested
1: Interrupt requested
At write
0: Clear interrupt request
1: Generate interrupt request
<When level-recognized>
R
0
At read
0: Interrupt not requested
1: Interrupt requested
4
No function assigned. Fix to "0"
0
0
(12)
5–7
ILEVEL
000: Interrupt priority level 0
R
W
(13–15)
Interrupt priority level bits
001: Interrupt priority level 1
010: Interrupt priority level 2
011: Interrupt priority level 3
100: Interrupt priority level 4
101: Interrupt priority level 5
110: Interrupt priority level 6
111: Interrupt priority level 7 (interrupt disabled)
(1) IREQ (Interrupt Request) bit (Bit 3 or 11)
When an interrupt request from some internal peripheral I/O occurs, the corresponding IREQ (Interrupt Re-
quest) bit is set to "1".
This bit can be set and cleared in software for only edge-recognized interrupt request sources (and not for
level-recognized interrupt request sources). Also, when this bit is set by an edge-recognized interrupt re-
quest generated, it is automatically cleared to "0" by reading the Interrupt Vector Register (IVECT) (not
cleared in the case of level-recognized interrupt request).
If the IREQ bit is cleared in software at the same time it is set by an interrupt request generated, clearing in
software has priority. Also, if the IREQ bit is cleared by reading the Interrupt Vector Register (IVECT) at the
same time it is set by an interrupt request generated, clearing by a read of the IVECT register has priority.
Note: • External Interrupt (EI) to the CPU core is not deasserted by clearing the IREQ bit. External
Interrupt (EI) to the CPU core can only be deasserted by the following operation:
(1) Reset
(2) IVECT register read
(3) Write to the IMASK register
Содержание M32R/ECU Series
Страница 17: ...12 This page is blank for reasons of layout...
Страница 18: ...CHAPTER 1 OVERVIEW 1 1 Outline of the 32180 Group 1 2 Block Diagram 1 3 Pin Functions 1 4 Pin Assignments...
Страница 712: ...CHAPTER 18 OSCILLATOR CIRCUIT 18 1 Oscillator Circuit 18 2 Clock Generator Circuit...
Страница 794: ...CHAPTER 22 TYPICAL CHARACTERISTICS...
Страница 795: ...22 22 2 32180 Group User s Manual Rev 1 0 TYPICAL CHARACTERISTICS To be written at a later time...
Страница 796: ...APPENDIX 1 MECHANICAL SPECIFICAITONS Appendix 1 1 Dimensional Outline Drawing...
Страница 798: ...APPENDIX 2 INSTRUCTION PROCESSING TIME Appendix 2 1 32180 Instruction Processing Time...
Страница 802: ...APPENDIX 3 PROCESSING OF UNUSED PINS Appendix 3 1 Example Processing of Unused Pins...