參數(shù)資料
型號: MC68HC05C9AMB
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, PDIP42
封裝: PLASTIC, SDIP-42
文件頁數(shù): 99/162頁
文件大小: 1093K
代理商: MC68HC05C9AMB
MC68HC05C9A Rev. 5.0
Advance Information
MOTOROLA
Interrupts
41
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N-D
I
SC
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IR
ED
Advance Information — MC68HC05C9A
Section 4. Interrupts
4.1 Contents
4.2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.3
Non-Maskable Software Interrupt (SWI). . . . . . . . . . . . . . . . . . 42
4.4
External Interrupt (IRQ or Port B) . . . . . . . . . . . . . . . . . . . . . . . 42
4.5
Timer Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.6
SCI Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.7
SPI Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.2 Introduction
The MC68HC05C9A 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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