以下关于嵌入式微处理器中断的叙述中，错误的是（)。
- A.大多数系统可以使用轮询方式让多个设备共享一个中断
- B.高优先级中断可以抢占低优先级中断，最高优先级中断不可被抢占
- C.多个中断源同时请求中断时，系统只能响应一个中断，其他中断会被丢弃
- D.当中断发生时，系统将自动备份当前程序状态寄存器
正确答案及解析
正确答案
解析
当有多个中断源同时请求时，会依据优先级判断按序执行，不会丢弃。
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