參數(shù)資料
型號(hào): 68HC05M68HC
廠商: Motorola, Inc.
英文描述: HCMOS Microcontroller Unit
中文描述: HCMOS微控制器
文件頁數(shù): 45/130頁
文件大?。?/td> 1541K
代理商: 68HC05M68HC
MC68HC705P6A
Rev. 2.0
Advance Information
MOTOROLA
Interrupts
45
Advance Information
MC68HC705P6A
Section 5. Interrupts
5.1 Contents
5.2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
5.3
5.3.1
5.3.2
5.3.3
5.3.3.1
5.3.3.2
5.3.3.3
5.3.3.4
Interrupt Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Reset Interrupt Sequence . . . . . . . . . . . . . . . . . . . . . . . . . .48
Software Interrupt (SWI). . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Hardware Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
External Interrupt (IRQ) . . . . . . . . . . . . . . . . . . . . . . . . . .48
Input Capture Interrupt. . . . . . . . . . . . . . . . . . . . . . . . . . .49
Output Compare Interrupt . . . . . . . . . . . . . . . . . . . . . . . .49
Timer Overflow Interrupt . . . . . . . . . . . . . . . . . . . . . . . . .49
5.2 Introduction
The MCU can be interrupted six different ways:
1.
Non-maskable software interrupt instruction (SWI)
2.
External asynchronous interrupt (IRQ)
3.
Input capture interrupt (TIMER)
4.
Output compare interrupt (TIMER)
5.
Timer overflow interrupt (TIMER)
6.
Port A interrupt (if selected via mask option register)
Interrupts cause the processor to save the register contents on the stack
and to set the interrupt mask (I bit) to prevent additional interrupts. Unlike
reset, hardware interrupts do not cause the current instruction execution
to be halted, but are considered pending until the current instruction is
completed.
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