M30800SFP-BL#U5 Renesas Electronics America, M30800SFP-BL#U5 Datasheet - Page 70

• Manufacturer Part Number: M30800SFP-BL#U5
• Description: MCU 3/5V 0K,PB-FREE 100-QFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/80r

Specifications of M30800SFP-BL#U5

• Core Processor: M16C/80
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 45
• Program Memory Type: ROMless
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 10x10b, D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

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9.2 Software Interrupts
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Software interrupts are generated by some instruction that generates an interrupt request when ex-
ecuted. Software interrupts are nonmaskable interrupts.
B
0
(1) Undefined-instruction interrupt
(2) Overflow interrupt
(3) BRK interrupt
(4) BRK2 interrupt
(5) INT instruction interrupt
0
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This interrupt occurs when the UND instruction is executed.
This interrupt occurs if the INTO instruction is executed when the O flag is 1.
The following lists the instructions that cause the O flag to change:
ABS, ADC, ADCF, ADD, ADDX, CMP, CMPX, DIV, DIVU, DIVX, NEG, RMPA, SBB, SCMPU, SHA,
SUB, SUBX
This interrupt occurs when the BRK instruction is executed.
This interrupt occurs when the BRK2 instruction is executed. This interrupt is used exclusively for
debugger purposes. You normally do not need to use this interrupt.
This interrupt occurs when the INT instruction is executed after specifying a software interrupt number
from 0 to 63. Note that software interrupt numbers 0 to 43 are assigned to peripheral I/O interrupts.
This means that by executing the INT instruction, you can execute the same interrupt routine as used
in peripheral I/O interrupts.
The stack pointer used in INT instruction interrupt varies depending on the software interrupt number.
For software interrupt numbers 0 to 31, the U flag is saved when an interrupt occurs and the U flag is
cleared to 0 to choose the interrupt stack pointer (ISP) before executing the interrupt sequence. The
previous U flag before the interrupt occurred is restored when control returns from the interrupt rou-
tine. For software interrupt numbers 32 to 63, such stack pointer switchover does not occur.
However, in peripheral I/O interrupts, the U flag is saved when an interrupt occurs and the U flag is
cleared to 0 to choose ISP.
Therefore movement of U flag is different by peripheral I/O interrupt or INT instruction in software
interrupt number 32 to 43.
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9. Interrupt Outline