???????? (1) XRL (2) EQU (3) MACRO (4) ORG

1
????? ?? 1
???????? (1) XRL (2) EQU (3) MACRO (4) ORG
2
????? ?? 2
8051?????? (1) CPL (2) CLR (3) INC (4) DEC
3
????? ?? 3
8051?????? (1) CPL (2) CLR (3) INC (4) DEC
4
????? ?? 4
8051????????????? (1) O (2) B (3) H (4) X
5
????? ?? 5
8051?????????????? (1) O (2) B (3) H (4) X
6
????? ?? 6
8051????? (1) ??(2) ??? (3) ??? (4)???
7
????? ?? 7
8051?P3.0????I/O???? (1) RXD (2) TXD (3) INT0
(4)INT1
8
????? ?? 8
8051?P3.1????I/O???? (1) RXD (2) TXD (3) INT0
(4)INT1
9
????? ?? 9
8051?P3.2????I/O???? (1) RXD (2) TXD (3) INT0
(4)INT1
10
????? ?? 10
8051?P3.3????I/O???? (1) RXD (2) TXD (3) INT0
(4)INT1
11
????? ?? 11
8051?P3.7????I/O???? (1) T0 (2) T1 (3) WR (4)RD
12
????? ?? 12
8051?P3.6????I/O???? (1) T0 (2) T1 (3) WR (4)RD
13
????? ?? 13
8051?P3.5????I/O???? (1) T0 (2) T1 (3) WR (4)RD
14
????? ?? 14
8051?P3.4????I/O???? (1) T0 (2) T1 (3) WR (4)RD
15
????? ?? 15
8051??????????? (1) 1 (2) 2 (3) 3 (4) 4
16
????? ?? 16
8051?????MODE 0? (1) 13 (2) 14 (3) 15 (4) 16
????
17
????? ?? 17
8051?????MODE 1? (1) 13 (2) 14 (3) 15 (4) 16
????
18
????? ?? 18
8051 ????????? (1) CALL (2) JMP (3) RET (4) RETI
19
????? ?? 19
8051 ??????????? (1) CALL (2) JMP (3) RET (4)
RETI
20
????? ?? 20
8051???/???????????/????(1)? (2)? (3)? (4)??
21
????? ?? 21
8051????0?????H???H??????,?????TF0?1?(1)0FFFF,00
0 (2)0FFFF,1111 (3)0FFFF,2222 (4)0FFFF,3333
22
????? ?? 22
8051????1???0FFFFH?0000H??????,????? (1) TF0
(2) TF1(3) RF0 (4) RF1 ?1?
23
????? ?? 23
8051??????????????????(1)1/6 (2)1/3 (3)1/24
(4)1/12
24
????? ?? 24
8051???????????????????????(1)F,0 (2)0,F (3)0,0
(4)1,0
25
????? ?? 25
???1?????? (1) TR0 (2) TR1 (3) RS1 (4) RS0
26
????? ?? 26
???0?????? (1) TR0 (2) TR1 (3) RS1 (4) RS0
27
????? ?? 27
DJNZ R4, ,????(1) ??? (2) ????? (3)????? (4)
?????
28
????? ?? 28
8051????/?????? (1) 0 (2) 1 (3) 255 (4) 65536
29
????? ?? 29
8051????/?????? (1) 0 (2) 1 (3) 255 (4) 65536
30
????? ?? 30
?????0AH ??? 2 ??? (1) 1011B (2) 1010B (3)
1100B (4) 1101B
31
????? ?? 31
?????0FH ??? 2 ??? (1) 1011B (2) 1010B (3)
1100B (4) 1111B
32
????? ?? 32
?????0CH ??? 2 ??? (1) 1011B (2) 1010B (3)
1100B (4) 1101B
33
????? ?? 33
?????0DH ??? 2 ??? (1) 1011B (2) 1010B (3)
1100B (4) 1101B
34
????? ?? 34
8051?????????? (1) NOP (2) DJNZ (3) MOV (4) DEC
35
????? ?? 35
8051??????????? (1) DJNZ (2) CJNE (3) JBC (4)
INC
36
????? ?? 36
8051????????? (1) NOP (2) DJNZ (3) MOV (4) DEC
37
????? ?? 37
?????????????C (1) DEC (2) INC (3) SUBB (4) ADDC
38
????? ?? 38
?????????????C (1) DEC (2) INC (3) SUBB (4) ADDC
39
????? ?? 39
?????????????? (1) MOVC (2) SWAP (3) XCH (4) DA
40
????? ?? 40
???????????? (1) MOVC (2) SWAP (3) XCH (4) DA
41
????? ?? 41
XRL A,0FFH ????????? (1) AND A,0FFH (2) ORL
A,0FFH (3) CPL A (4) CLR A
42
????? ?? 42
MOV A,045H ??? A ? (1) 23H (2) 34H (3) 45H (4)
56H
43
????? ?? 43
????????Cy1?? (1) JZ (2) JNZ (3) JC (4) JNC
44
????? ?? 44
????????A0?? (1) JZ (2) JNZ (3) JC (4) JNC
45
????? ?? 45
??????????? (1) RAM (2) ROM (3) SRAM (4) DRAM
46
????? ?? 46
MOV A,99H ADD A,39H ??? A (1) 12H (2) C2H
(3) D2H (4) E2H
47
????? ?? 47
???????? (1) MICRO (2) MACRO (3) ENDM (4) END
48
????? ?? 48
?????????? (1) MICRO (2) MACRO (3) ENDM (4) END