參數(shù)資料
型號(hào): MC68HC705C9ACP
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: Microcontrollers
中文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP40
封裝: PLASTIC, DIP-40
文件頁數(shù): 51/160頁
文件大?。?/td> 2076K
代理商: MC68HC705C9ACP
MC68HC705C9A — Rev. 4.0
Advance Information
MOTOROLA
Interrupts
51
Advance Information — MC68HC705C9A
Section 4. Interrupts
4.1 Contents
4.2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
4.3
Non-Maskable Software Interrupt (SWI). . . . . . . . . . . . . . . . . .53
4.4
External Interrupt (IRQ or Port B). . . . . . . . . . . . . . . . . . . . . . .53
4.5
Timer Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
4.6
SCI Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
4.7
SPI Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
4.2 Introduction
The 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
Serial peripheral interface
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
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.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
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MC68HC705C9ACPE 制造商:Freescale Semiconductor 功能描述:
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