89C51单片机复位后,P1口为()。A、00HB、0FHC、FFHD、F0H
89C51单片机复位后,P1口为()。
- A、00H
- B、0FH
- C、FFH
- D、F0H
相关考题:
单片机复位后,SP、PC、I/O口的内容为( ) A.SP = 07H PC = 00H P0 = P1 = P2 = P3 = FFHB.SP = 00H PC = 0000H P0 = P1 = P2 = P3 = 00HC.SP = 07H PC = 0000H P0 = P1 = P2 = P3 = FFHD.SP = 00H PC = 00H P0 = P1 = P2 = P3 = 00H
单片机复位后,SP、PC、I/O口的内容为()A、SP=07HPC=00HP0=P1=P2=P3=FFHB、SP=00HPC=0000HP0=P1=P2=P3=00HC、SP=07HPC=0000HP0=P1=P2=P3=FFHD、SP=00HPC=00HP0=P1=P2=P3=00H
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=FFHB、SP=00H PC=0000H I/O 口=00HC、SP=07H PC=0000H I/O 口=FFHD、SP=07H PC=0000H I/O 口=00H
判断题MCS-51单片机的所有I/O口锁存器在复位后均被置为“0”。A对B错