8
AT90S8515
0841GS–09/01
DATA TRANSFER INSTRUCTIONS
MOV
Rd, Rr
Move between Registers
Rd
←
Rr
None
1
LDI
Rd, K
Load Immediate
Rd
←
K
None
1
LD
Rd, X
Load Indirect
Rd
←
(X)
None
2
LD
Rd, X+
Load Indirect and Post-inc.
Rd
←
(X), X
←
X + 1
None
2
LD
Rd, -X
Load Indirect and Pre-dec.
X
←
X - 1, Rd
←
(X)
None
2
LD
Rd, Y
Load Indirect
Rd
←
(Y)
None
2
LD
Rd, Y+
Load Indirect and Post-inc.
Rd
←
(Y), Y
←
Y + 1
None
2
LD
Rd, -Y
Load Indirect and Pre-dec.
Y
←
Y - 1, Rd
←
(Y)
None
2
LDD
Rd, Y+q
Load Indirect with Displacement
Rd
←
(Y + q)
None
2
LD
Rd, Z
Load Indirect
Rd
←
(Z)
None
2
LD
Rd, Z+
Load Indirect and Post-inc.
Rd
←
(Z), Z
←
Z + 1
None
2
LD
Rd, -Z
Load Indirect and Pre-dec.
Z
←
Z - 1, Rd
←
(Z)
None
2
LDD
Rd, Z+q
Load Indirect with Displacement
Rd
←
(Z + q)
None
2
LDS
Rd, k
Load Direct from SRAM
Rd
←
(k)
None
2
ST
X, Rr
Store Indirect
(X)
=
←
Rr
None
2
ST
X+, Rr
Store Indirect and Post-inc.
(X)
=
←
Rr, X
←
X + 1
None
2
ST
-X, Rr
Store Indirect and Pre-dec.
X
←
X - 1, (X)
←
Rr
None
2
ST
Y, Rr
Store Indirect
(Y)
←
Rr
None
2
ST
Y+, Rr
Store Indirect and Post-inc.
(Y)
←
Rr, Y
←
Y + 1
None
2
ST
-Y, Rr
Store Indirect and Pre-dec.
Y
←
Y - 1, (Y)
←
Rr
None
2
STD
Y+q, Rr
Store Indirect with Displacement
(Y + q)
←
Rr
None
2
ST
Z, Rr
Store Indirect
(Z)
←
Rr
None
2
ST
Z+, Rr
Store Indirect and Post-inc.
(Z)
←
Rr, Z
←
Z + 1
None
2
ST
-Z, Rr
Store Indirect and Pre-dec.
Z
←
Z - 1, (Z)
←
Rr
None
2
STD
Z+q, Rr
Store Indirect with Displacement
(Z + q)
←
Rr
None
2
STS
k, Rr
Store Direct to SRAM
(k)
←
Rr
None
2
LPM
Load Program Memory
R0
←
(Z)
None
3
IN
Rd, P
In Port
Rd
←
P
None
1
OUT
P, Rr
Out Port
P
←
Rr
None
1
PUSH
Rr
Push Register on Stack
STACK
←
Rr
None
2
POP
Rd
Pop Register from Stack
Rd
←
STACK
None
2
BIT AND BIT-TEST INSTRUCTIONS
SBI
P, b
Set Bit in I/O Register
I/O(P,b)
←
1
None
2
CBI
P, b
Clear Bit in I/O Register
I/O(P,b)
←
0
None
2
LSL
Rd
Logical Shift Left
Rd(n+1)
←
Rd(n), Rd(0)
←
0
Z,C,N,V
1
LSR
Rd
Logical Shift Right
Rd(n)
←
Rd(n+1), Rd(7)
←
0
Z,C,N,V
1
ROL
Rd
Rotate Left through Carry
Rd(0)
←
=
C, Rd(n+1)
←
Rd(n), C
←
=
Rd(7)
Z,C,N,V
1
ROR
Rd
Rotate Right through Carry
Rd(7)
←
=
C, Rd(n)
←
Rd(n+1), C
←
=
Rd(0)
Z,C,N,V
1
ASR
Rd
Arithmetic Shift Right
Rd(n)
←
Rd(n+1), n = 0..6
Z,C,N,V
1
SWAP
Rd
Swap Nibbles
Rd(3..0)
←
=
Rd(7..4), Rd(7..4)
←
=
Rd(3..0)
None
1
BSET
s
Flag Set
SREG(s)
←
1
SREG(s)
1
BCLR
s
Flag Clear
SREG(s)
←
0
SREG(s)
1
BST
Rr, b
Bit Store from Register to T
T
←
Rr(b)
T
1
BLD
Rd, b
Bit Load from T to Register
Rd(b)
←
T
None
1
SEC
Set Carry
C
←
1
C
1
CLC
Clear Carry
C
←
0
C
1
SEN
Set Negative Flag
N
←
1
N
1
CLN
Clear Negative Flag
N
←
0
N
1
SEZ
Set Zero Flag
Z
←
1
Z
1
CLZ
Clear Zero Flag
Z
←
0
Z
1
SEI
Global Interrupt Enable
I
←
1
I
1
CLI
Global Interrupt Disable
I
=
←
0
I
1
SES
Set Signed Test Flag
S
←
1
S
1
CLS
Clear Signed Test Flag
S
←
0
S
1
SEV
Set Two’s Complement Overflow
V
←
1
V
1
CLV
Clear Two’s Complement Overflow
V
←
0
V
1
SET
Set T in SREG
T
←
1
T
1
CLT
Clear T in SREG
T
←
0
T
1
SEH
Set Half-carry Flag in SREG
H
←
1
H
1
CLH
Clear Half-carry Flag in SREG
H
←
0
H
1
NOP
No Operation
None
1
SLEEP
Sleep
(see specific descr. for Sleep function)
None
1
WDR
Watchdog Reset
(see specific descr. for WDR/timer)
None
1
Instruction Set Summary (Continued)
Mnemonic
Operands
Description
Operation
Flags
# Clocks
