外部3.8V时候 触发2.9V的PVD,但是USART通信没问题。打印出ms的时间
可以看到。
normal = 0,-----26611
normal = 0,-----27611
pvd = 2
normal = 0,-----28611
normal = 0,-----29611
normal = 0,-----30610
normal = 0,-----31611
normal = 0,-----32611
normal = 0,-----33611
normal = 0,-----34611
normal = 0,-----35611
normal = 0,-----36611
pvd = 3
normal = 0,-----37611
当外部供电达到3.056时候
RS232的com1停止输出
normal = 0,-----468611
normal = 0,-----469611
normal = 0,-----470611
normal = 0,-----471611
normal = 0,-----472610
normal = 0,-----473611
normal = 0,-----474610
normal = 0,-----475611//这里停止了