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參數(shù)資料
| 型號： | M38C37ECMFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80 |
| 文件頁數(shù)： | 10/65頁 |
| 文件大小： | 808K |
| 代理商： | M38C37ECMFP |
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15
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C3 Group
INTERRUPTS
Interrupts occur by sixteen sources: six external, nine internal, and
one software.
Interrupt Control
Each interrupt except the BRK instruction interrupt have both an in-
terrupt request bit and an interrupt enable bit, and is controlled by the
interrupt disable flag. An interrupt occurs if the corresponding inter-
rupt request and enable bits are “1” and the interrupt disable flag is
“0”.
Interrupt enable bits can be set or cleared by software. Interrupt re-
quest bits can be cleared by software, but cannot be set by software.
The BRK instruction interrupt and reset cannot be disabled with any
flag or bit. The I flag disables all interrupts except the BRK instruction
interrupt and reset. If several interrupts requests occurs at the same
time the interrupt with highest priority is accepted first.
Interrupt Operation
By acceptance of an interrupt, the following operations are automati-
cally performed:
1. The processing being executed is stopped.
2. The contents of the program counter and processor status reg-
ister are automatically pushed onto the stack.
3. The interrupt disable flag is set and the corresponding interrupt
request bit is cleared.
4. The interrupt jump destination address is read from the vector
table into the program counter.
sNotes on Interrupts
When the active edge of an external interrupt (INT0 – INT2, CNTR0
or CNTR1) is set or an vector interrupt source where several interrupt
source is assigned to the same vector address is switched, the cor-
responding interrupt request bit may also be set. Therefore, take fol-
lowing sequence:
(1) Disable the interrupt.
(2) Change the active edge in interrupt edge selection register.
(3) Clear the set interrupt request bit to “0.”
(4) Enable the interrupt.
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相關(guān)代理商/技術(shù)參數(shù) |
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| M38C59GFHP#U0 | 制造商:Renesas Electronics Corporation 功能描述:MCU 2/4V 60K PB-FREE - Trays |
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| M38D20F2XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38D20F2XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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