參數(shù)資料
型號: MC68HC05C9ECP
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, PDIP40
封裝: PLASTIC, DIP-40
文件頁數(shù): 78/144頁
文件大?。?/td> 1628K
代理商: MC68HC05C9ECP
MC68HC05C9E
Advance Information
MOTOROLA
Interrupts
39
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Advance Information — MC68HC05C9E
Section 4. Interrupts
4.1 Contents
4.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.3
Non-Maskable Software Interrupt (SWI). . . . . . . . . . . . . . . . . . 40
4.4
External Interrupt (IRQ or Port B) . . . . . . . . . . . . . . . . . . . . . . . 40
4.5
Timer Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.6
SCI Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.7
SPI Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.2 Introduction
The MC68HC05C9E microcontroller unit (MCU) can be interrupted by
five different sources: four maskable hardware interrupts, and one non-
maskable software interrupt:
External signal on the IRQ pin or port B pins
16-bit programmable timer
Serial communications interface (SCI)
Serial peripheral interface (SPI)
Software interrupt instruction (SWI)
Interrupts cause the processor to save register contents on the stack
and to set the interrupt mask (I bit) to prevent additional interrupts. The
return from interrupt (RTI) instruction causes the register contents to be
recovered from the stack and normal processing to resume.
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