题目内容
The same level interrupt in AT89S51 can't be nested.
查看答案
搜索结果不匹配？点我反馈
更多问题
External interrupt 0 can interrupt the interrupt service program of external interrupt 1.
Interrupt service subroutine can be called directly.
On the premise of interrupting, as long as the interrupt source sends an interrupt request, the CPU will respond to the interrupt immediately.
In the internal structure of MCS-51 single chip microcomputer, tmod is the mode control register, which is mainly used to control the start and stop of timer.
微信支付 
支付宝支付