參數(shù)資料
型號： MC68HC05P9ACDW
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝： SOIC-28
文件頁數(shù)： 20/90頁
文件大?。?/td> 285K
代理商： MC68HC05P9ACDW
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.
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05P9ACP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P9ADW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P9AMDW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P9AMP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05P9AP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
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