m30833fjgp Renesas Electronics Corporation., m30833fjgp Datasheet - Page 112
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m30833fjgp
Manufacturer Part Number
m30833fjgp
Description
Renesas 16/32-bit Single-chip Microcomputer M16c Family / M32c/80 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M30833FJGP.pdf
(527 pages)
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10. Interrupts
10.1 Types of Interrupts
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10.2 Software Interrupts
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Figure 10.1 Interrupts
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0
1
Software interrupt occurs when an instruction is executed. The software interrupts are non-maskable inter-
rupts.
10.2.1 Undefined Instruction Interrupt
10.2.2 Overflow Interrupt
10.2.3 BRK Interrupt
C
9
3 .
B
Interrupt
Figure 10.1 shows types of interrupts.
8 /
• Maskable Interrupt
• Non-maskable Interrupt
The undefined instruction interrupt occurs when the UND instruction is executed.
The overflow interrupt occurs when the O flag in the FLG register is set to "1" (overflow of arithmetic
operation) and the INTO instruction is executed.
Instructions to set the O flag are :
ABS, ADC, ADCF, ADD, ADDX, CMP, CMPX, DIV, DIVU, DIVX, NEG, RMPA, SBB, SCMPU, SHA, SUB, SUBX
The BRK interrupt occurs when the BRK instruction is executed.
0
NOTES:
1
The I flag enables or disables an interrupt.
The interrupt priority order based on interrupt priority level can be changed.
The I flag does not enable nor disable an interrupt .
The interrupt priority order based on interrupt priority level cannot be changed.
3
0
1. The peripheral functions in the microcomputer are used to generate the peripheral interrupt.
2. Do not use this interrupt. For development support tools only.
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3 .
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2
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Software
(Non-Maskable Interrupt)
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Hardware
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Page 89
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Special
(Non-Maskable Interrupt)
Peripheral Function
(Maskable Interrupt)
(1)
Undefined Instruction (UND Instruction)
Overflow (INTO Instruction)
BRK Instruction
BRK2 Instruction
INT Instruction
_______
NMI
Watchdog Timer
Oscillation Stop Detect
Single-Step
Address Match
DMACII
(2)
(2)
10. Interrupts
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