參數(shù)資料
型號： M30102M3-XXXFP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP48
封裝： PLASTIC, LQFP-48
文件頁數(shù)： 94/163頁
文件大?。?/td> 2767K
代理商： M30102M3-XXXFP
Under
development
Tentative Specifications REV.E1
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30100/M30102 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Interrupts
36
Software Interrupts
A software interrupt occurs when executing certain instructions. Software interrupts are non-maskable
interrupts.
Undefined instruction interrupt
An undefined instruction interrupt occurs when executing the UND instruction.
Overflow interrupt
An overflow interrupt occurs when executing the INTO instruction with the overflow flag (O flag) set to “1”.
The following are instructions whose O flag changes by arithmetic:
ABS, ADC, ADCF, ADD, CMP, DIV, DIVU, DIVX, NEG, RMPA, SBB, SHA, SUB
BRK interrupt
A BRK interrupt occurs when executing the BRK instruction.
_______
INT interrupt
_______
An INT interrupt occurs when assigning one of software interrupt numbers 0 through 63 and executing the
_______
INT instruction. Software interrupt numbers 0 through 31 are assigned to peripheral I/O interrupts, so
_______
executing the INT instruction allows executing the same interrupt routine that a peripheral I/O interrupt
does.
_______
The stack pointer (SP) used for the INT interrupt is dependent on which software interrupt number is
involved.
So far as software interrupt numbers 0 through 31 are concerned, the microcomputer saves the stack
pointer assignment flag (U flag) when it accepts an interrupt request. If change the U flag to “0” and select
the interrupt stack pointer (ISP), and then execute an interrupt sequence. When returning from the
interrupt routine, the U flag is returned to the state it was before the acceptance of interrupt request. So
far as software numbers 32 through 63 are concerned, the stack pointer does not make a shift.
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