TSC80251G2D
Table 29. Summary of Bit Instructions
Clear Bit
CLR <dest>
dest opnd ← 0
Set Bit
Complement Bit
AND Carry with Bit
SETB <dest>
CPL <dest>
ANL CY, <src>
dest opnd ← 1
dest opnd ←
(CY) ← (CY) src opnd
bit
AND Carry with Complement of Bit ANL CY, /<src>
OR Carry with Bit ORL CY, <src>
OR Carry with Complement of Bit ORL CY, /<src>
(CY) ← (CY)
(CY) ← (CY) src opnd
(CY) ← (CY)
src opnd
src opnd
Move Bit to Carry
Move Bit from Carry
MOV CY, <src>
MOV <dest>, CY
(CY) ← src opnd
dest opnd ← (CY)
Binary Mode
Source Mode
Mnemonic
<dest>, <src>(1)
Comments
Bytes States Bytes States
CY
Clear carry
1
2
4
1
2
4
1
2
4
2
4
2
4
2
4
2
4
2
4
2
4
1
1
2
3
1
2
3
1
2
3
2
3
2
3
2
3
2
3
2
3
2
3
1
(3)
(3)
CLR
bit51
Clear direct bit
2
2
(3)
(3)
bit
Clear direct bit
4
3
CY
Set carry
1
1
(3)
(3)
SETB
CPL
bit51
Set direct bit
2
2
(3)
(3)
bit
Set direct bit
4
3
CY
Complement carry
Complement direct bit
Complement direct bit
And direct bit to carry
And direct bit to carry
1
1
(3)
(3)
bit51
2
2
(3)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(3)
(3)
(3)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(3)
(3)
bit
4
1
3
1
3
1
3
1
3
1
3
2
4
3
1
2
1
2
1
2
1
2
1
2
2
3
CY, bit51
CY, bit
CY, /bit51
CY, /bit
CY, bit51
CY, bit
CY, /bit51
CY, /bit
CY, bit51
CY, bit
bit51, CY
bit, CY
ANL
ORL
And complemented direct bit to carry
And complemented direct bit to carry
Or direct bit to carry
Or direct bit to carry
Or complemented direct bit to carry
Or complemented direct bit to carry
Move direct bit to carry
Move direct bit to carry
MOV
Move carry to direct bit
Move carry to direct bit
Notes:
1. A shaded cell denotes an instruction in the C51 Architecture.
2. If this instruction addresses an I/O Port (Px, x= 0-3), add 1 to the number of states. Add 2 if it addresses a Peripheral SFR.
3. If this instruction addresses an I/O Port (Px, x= 0-3), add 2 to the number of states. Add 3 if it addresses a Peripheral SFR.
Rev. A - May 7, 1999
24
TEMIC [ TEMIC SEMICONDUCTORS ]
