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參數(shù)資料
| 型號： | M30218MFCFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | PLASTIC, QFP-100 |
| 文件頁數(shù)： | 97/161頁 |
| 文件大?。?/td> | 2043K |
| 代理商： | M30218MFCFP |
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40
Under
development
Tentative Specifications REV.A
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M30218 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Interrupt
Interrupt Priority
If there are two or more interrupt requests occurring at a point in time within a single sampling (checking
whether interrupt requests are made), the interrupt assigned a higher priority is accepted.
Assign an arbitrary priority to maskable interrupts (peripheral I/O interrupts) using the interrupt priority level
select bit. If the same interrupt priority level is assigned, however, the interrupt assigned a higher hardware
priority is accepted.
Priorities of the special interrupts, such as Reset (dealt with as an interrupt assigned the highest priority),
watchdog timer interrupt, etc. are regulated by hardware.
Figure DD-8 shows the priorities of hardware interrupts.
Software interrupts are not affected by the interrupt priority. If an instruction is executed, control branches
invariably to the interrupt routine.
Returning from an Interrupt Routine
Executing the REIT instruction at the end of an interrupt routine returns the contents of the flag register
(FLG) as it was immediately before the start of interrupt sequence and the contents of the program counter
(PC), both of which have been saved in the stack area. Then control returns to the program that was being
executed before the acceptance of the interrupt request, so that the suspended process resumes.
Return the other registers saved by software within the interrupt routine using the POPM or similar instruc-
tion before executing the REIT instruction.
Interrupt resolution circuit
When two or more interrupts are generated simultaneously, this circuit selects the interrupt with the highest
priority level. Figure DD-9 shows the circuit that judges the interrupt priority level.
Figure DD-8. Hardware interrupts priorities
________
Reset > DBC > Watchdog timer > Peripheral I/O > Single step > Address match
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| M3021E8F2-AXXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M3021E8F4-AXXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M3021E8F6-AXXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M3021E8F8-AXXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M3021E8FA-AXXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
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