5
5-8
Rev.1.0
INTERRUPT CONTROLLER (ICU)
5.3 ICU Related Registers
5.3.2 Interrupt Mask Register
■
Interrupt Mask Register (IMASK)
<Address: H'0080 0004>
<When reset: H'07>
D
Bit Name
Function
R
W
0-4
No functions assigned
0
–
5-7
IMASK (interrupt mask)
000: Disables maskable interrupt
001: Enables level 0 interrupt to be accepted
010: Enables level 0-1 interrupts to be accepted
011: Enables level 0-2 interrupts to be accepted
100: Enables level 0-3 interrupts to be accepted
101: Enables level 0-4 interrupts to be accepted
110: Enables level 0-5 interrupts to be accepted
111: Enables level 0-6 interrupts to be accepted
The Interrupt Mask Register (IMASK) is used to set an interrupt mask to be compared with the
priority level that has been set for each interrupt source (i.e., the Interrupt Control Register ILEVEL
bit) to determine whether or not to accept the interrupt request.
When the Interrupt Vector Register (IVECT) described above is read out, a new mask value
(NEW_IMASK) is set in this IMASK Register.
Upon writing to the IMASK Register, operations (1) to (2) below are automatically performed in
hardware.
(1) Negate the interrupt request (EI) sent to the CPU core
(2) Activate the ICU's internal sequencer to start internal processing (interrupt priority
resolution)
D0
1
2
3
4
5
6
D7
IMASK
CAUTION
Do not write to the Interrupt Mask Register (IMASK) in other than the EIT handler
(unless the PSW Register IE bit is 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 ...