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参数资料
| 型号： | MC68HC05P9AP |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28 |
| 封装： | PLASTIC, DIP-28 |
| 文件页数： | 20/90页 |
| 文件大小： | 285K |
| 代理商： | MC68HC05P9AP |
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GENERAL RELEASE SPECIFICATION
MC68HC05P9A
INTERRUPTS
MOTOROLA
Rev. 2.0
4-1
SECTION 4
INTERRUPTS
The MCU can be interrupted four different ways: the two maskable hardware
interrupts (IRQ and timer), the non-maskable software interrupt instruction (SWI),
and by the optional external asynchronous interrupt on each port A pin (enabled
by pullup mask option).
Interrupts cause the processor to save register contents on the stack and to set
the interrupt mask (I bit) to prevent additional interrupts.
The RTI instruction
causes the register contents to be recovered from the stack and normal
processing to resume.
Unlike RESET, hardware interrupts do not cause the current instruction execution
to be halted, but are considered pending until the current instruction is complete.
NOTE
The current instruction is the one already fetched and being
operated on.
When the current instruction is complete, the processor checks all pending
hardware interrupts. If interrupts are not masked (CCR I bit clear) and if the
corresponding interrupt enable bit is set, the processor proceeds with interrupt
processing; otherwise, the next instruction is fetched and executed.
If both an external interrupt and a timer interrupt are pending at the end of an
instruction execution, the external interrupt is serviced rst. The SWI is executed
the same as any other instruction, regardless of the I-bit state.
Table 4-1 lists vector addresses for all interrupts including reset.
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相关代理商/技术参数 |
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|---|---|
| MC68HC05P9AVDW | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05P9AVP | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC05P9DW | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05P9P | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC05PV8 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Techinal Data - rev 1.9 |
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