单片机的中断是怎么实现的呢？硬件做死的？

IROI

硬件实现的吧，指令流水线设计那里设计好的。

yuhc

中断向量表只是一个映射的列表

jwiloveyou

硬件实现，软件去应用

njnuaya

单片机硬件的功能

清水行者

与功能寄存器有关，不过可以用软件实现

ramanujancn

环境保护以后PC（PROGRAM COUNTER)转向中断向量指向的入口

kirannevaskar

You can jump to some different memory from predefined interrupt address. This is a general practice. In case of 8051 you can write 8 bytes of code in between 2 ISR vector location. If your code is large then you can have LCALL instruction. Write ISR handler to new location. You can change priority of interrupt. Startup code initializes memory and some cpu related registers and stack pointer

storm_whisper

回复 17# kirannevaskar


That's make sense , but I have another quetions.   A simple question , that if pc and stack share the register in the R-8051, then after the interrupt how could the PC go back to position ,I mean a general idea, not too much detail, when I read the VHDL code of a R-8051code but confusing with this, where it maybe concern ? in the ITR part, or RAM&SFR&MEM Ctrl part?

sangrealf

硬件实现的，软件可配置

egoogle

了解下CPU是怎么执行指令的，就可以了解程序如何被中断。