Instruction Set Summary (Continued)
Mnemonic
Operands
Description
Operation
Flags
# Clocks
BIT AND BIT-TEST INSTRUCTIONS
SBI
CBI
LSL
P, b
P, b
Rd
Rd
Rd
Rd
Rd
Rd
s
Set Bit in I/O Register
Clear Bit in I/O Register
Logical Shift Left
Logical Shift Right
Rotate Left through Carry
Rotate Right through Carry
Arithmetic Shift Right
Swap Nibbles
Flag Set
Flag Clear
Bit Store from Register to T
Bit Load from T to Register
Set Carry
Clear Carry
Set Negative Flag
Clear Negative Flag
Set Zero Flag
Clear Zero Flag
Global Interrupt Enable
Global Interrupt Disable
Set Signed Test Flag
Clear Signed Test Flag
Set Two’s Complement Overflow
Clear Two’s Complement Overflow
Set T in SREG
I/O(P,b) ← 1
I/O(P,b) ← 0
Rd(n+1) ← Rd(n), Rd(0) ← 0
Rd(n) ← Rd(n+1), Rd(7) ← 0
Rd(0) ← C,Rd(n+1) ← Rd(n),C ← Rd(7)
Rd(7) ← C,Rd(n) ← Rd(n+1),C ← Rd(0)
Rd(n) ← Rd(n+1), n = 0..6
Rd(3..0) ← Rd(7..4),Rd(7..4) ← Rd(3..0)
SREG(s) ← 1
SREG(s) ← 0
T ← Rr(b)
Rd(b) ← T
C ← 1
C ← 0
N ← 1
N ← 0
Z ← 1
Z ← 0
I ← 1
I ← 0
S ← 1
S ← 0
V ← 1
V ← 0
T ← 1
None
None
Z,C,N,V
Z,C,N,V
Z,C,N,V
Z,C,N,V
Z,C,N,V
None
SREG(s)
SREG(s)
T
None
C
C
N
N
Z
Z
I
I
S
S
V
V
T
T
H
H
None
None
None
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
LSR
ROL
ROR
ASR
SWAP
BSET
BCLR
BST
BLD
SEC
CLC
SEN
CLN
SEZ
CLZ
SEI
s
Rr, b
Rd, b
CLI
SES
CLS
SEV
CLV
SET
CLT
SEH
CLH
NOP
SLEEP
WDR
Clear T in SREG
T ← 0
H ← 1
H ← 0
Set Half-carry Flag in SREG
Clear Half-carry Flag in SREG
No Operation
Sleep
Watchdog Reset
(see specific descr. for Sleep function)
(see specific descr. for WDR/timer)
64
AT90S1200
0838H–AVR–03/02
ATMEL [ ATMEL ]
