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| 型號(hào)： | MC68HC05E0 |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, 4 MHz, MICROCONTROLLER, PQCC68 |
| 封裝： | PLASTIC, LCC-68 |
| 文件頁數(shù)： | 33/96頁 |
| 文件大?。?/td> | 970K |
| 代理商： | MC68HC05E0 |
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4
MC68HC05E0
MOTOROLA
4-3
RESETS, INTERRUPTS AND LOW POWER MODES
When the current instruction is complete, the processor checks all pending hardware interrupts. If
interrupts are not masked (CCR I bit clear), the processor proceeds with interrupt processing;
otherwise, the next instruction is fetched and executed.
Internal circuitry generates a processor interrupt signal IRQB if an interrupt occurs via either the
external interrupt pin INTX, the wake-up function on Port C, or a real time interrupt (see
Figure 4-2). The interrupting source can be determined by testing the state of the INTFX, WAKF
and RTIF ag bits.
Note:
Acknowledging an interrupt signal too early could have an effect on the BIH and BIL
command functions.
Figure 4-2 Internal Processor Interrupt Signal IRQB
Real Time Interrupt
RTIE
RTIF
Wake-up (Port C)
WAKF
IRQB
INTMX
INTXP
Pad
INTX
INTFX
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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