A.SP = 07H PC = 00H P0 = P1 = P2 = P3 = FFH
B.SP = 00H PC = 0000H P0 = P1 = P2 = P3 = 00H
C.SP = 07H PC = 0000H P0 = P1 = P2 = P3 = FFH
D.SP = 00H PC = 00H P0 = P1 = P2 = P3 = 00H
第1题:
AT89S52单片机复位时,堆栈指针SP中的内容为 ,程序指针PC中的内容为
第2题:
单片机复位后,SP、PC、I/O口(P0、P1、P2、P3)的内容为()
A.SP = 00H PC = 1000H I/O口= FFH
B.SP = 00H PC = 0000H I/O口= 00H
C.SP = 07H PC = 0000H I/O口= FFH
D.SP = 07H PC = 0000H I/O口= 00H
第3题:
判断:单片机复位后, I/O口的内容分别为0xff,是否正确。
第4题:
51单片机复位后,PC与P口(I/O)的值为()。
A.0000H, 00H
B.0000H, FFH
C.0003H, FFH
D.0003H, 00H
第5题:
20、MCS-51单片机复位后,PC,SP,ACC以及P0口的内容错误的是()?
A.PC=0000H
B.SP=08H
C.ACC=01H
D.P0=0FFH