89C51单片机复位后,P1口为()。
A.00H
B. 0FH
C. FFH
D. F0H
- · 有3位网友选择 D,占比33.33%
- · 有2位网友选择 C,占比22.22%
- · 有2位网友选择 B,占比22.22%
- · 有2位网友选择 A,占比22.22%
A.00H
B. 0FH
C. FFH
D. F0H
A.00H
B.0FFH
C.0F0H
D.不定
E.: B
F.:单选题 G. 、当MCS-51复位时,下面说法正确的是: H. =00H
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
A、A. SP = 00H PC = 1000H I/O口= FFH
B、B. SP = 00H PC = 0000H I/O口= 00H
C、C. SP = 07H PC = 0000H I/O口= FFH
D、D. SP = 07H PC = 0000H I/O口= 00H
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