230
9152BINDCO02/10
ATA8743
32. Instruction Set Summary
Mnemonics
Operands
Description
Operation
Flags
#Clocks
ARITHMETIC AND LOGIC INSTRUCTIONS
ADD
Rd, Rr
Add two Registers
Rd ? Rd + Rr
Z,C,N,V,H
1
ADC
Rd, Rr
Add with Carry two Registers
Rd ? Rd + Rr + C
Z,C,N,V,H
1
ADIW
Rdl,K
Add Immediate to Word
Rdh:Rdl ? Rdh:Rdl + K
Z,C,N,V,S
2
SUB
Rd, Rr
Subtract two Registers
Rd ? Rd - Rr
Z,C,N,V,H
1
SUBI
Rd, K
Subtract Constant from Register
Rd ? Rd - K
Z,C,N,V,H
1
SBC
Rd, Rr
Subtract with Carry two Registers
Rd ? Rd - Rr - C
Z,C,N,V,H
1
SBCI
Rd, K
Subtract with Carry Constant from Reg.
Rd ? Rd - K - C
Z,C,N,V,H
1
SBIW
Rdl,K
Subtract Immediate from Word
Rdh:Rdl ? Rdh:Rdl - K
Z,C,N,V,S
2
AND
Rd, Rr
Logical AND Registers
Rd ? Rd " Rr
Z,N,V
1
ANDI
Rd, K
Logical AND Register and Constant
Rd ? Rd " K
Z,N,V
1
OR
Rd, Rr
Logical OR Registers
Rd ? Rd v Rr
Z,N,V
1
ORI
Rd, K
Logical OR Register and Constant
Rd ? Rd v K
Z,N,V
1
EOR
Rd, Rr
Exclusive OR Registers
Rd ? Rd ?Rr
Z,N,V
1
COM
Rd
Ones Complement
Rd ? 0xFF Rd
Z,C,N,V
1
NEG
Rd
Twos Complement
Rd ? 0x00 Rd
Z,C,N,V,H
1
SBR
Rd,K
Set Bit(s) in Register
Rd ? Rd v K
Z,N,V
1
CBR
Rd,K
Clear Bit(s) in Register
Rd ? Rd " (0xFF - K)
Z,N,V
1
INC
Rd
Increment
Rd ? Rd + 1
Z,N,V
1
DEC
Rd
Decrement
Rd ? Rd 1
Z,N,V
1
TST
Rd
Test for Zero or Minus
Rd ? Rd " Rd
Z,N,V
1
CLR
Rd
Clear Register
Rd ? Rd ?Rd
Z,N,V
1
SER
Rd
Set Register
Rd ? 0xFF
None
1
BRANCH INSTRUCTIONS
RJMP
k
Relative Jump
PC ? PC + k + 1
None
2
IJMP
Indirect Jump to (Z)
PC ? Z
None
2
RCALL
k
Relative Subroutine Call
PC ? PC + k + 1
None
3
ICALL
Indirect Call to (Z)
PC ? Z
None
3
RET
Subroutine Return
PC ? STACK
None
4
RETI
Interrupt Return
PC ? STACK
I
4
CPSE
Rd,Rr
Compare, Skip if Equal
if (Rd = Rr) PC ? PC + 2 or 3
None
1/2/3
CP
Rd,Rr
Compare
Rd Rr
Z, N,V,C,H
1
CPC
Rd,Rr
Compare with Carry
Rd Rr C
Z, N,V,C,H
1
CPI
Rd,K
Compare Register with Immediate
Rd K
Z, N,V,C,H
1
SBRC
Rr, b
Skip if Bit in Register Cleared
if (Rr(b)=0) PC ? PC + 2 or 3
None
1/2/3
SBRS
Rr, b
Skip if Bit in Register is Set
if (Rr(b)=1) PC ? PC + 2 or 3
None
1/2/3
SBIC
P, b
Skip if Bit in I/O Register Cleared
if (P(b)=0) PC ? PC + 2 or 3
None
1/2/3
SBIS
P, b
Skip if Bit in I/O Register is Set
if (P(b)=1) PC ? PC + 2 or 3
None
1/2/3
BRBS
s, k
Branch if Status Flag Set
if (SREG(s) = 1) then PC?PC+k + 1
None
1/2
BRBC
s, k
Branch if Status Flag Cleared
if (SREG(s) = 0) then PC?PC+k + 1
None
1/2
BREQ
k
Branch if Equal
if (Z = 1) then PC ? PC + k + 1
None
1/2
BRNE
k
Branch if Not Equal
if (Z = 0) then PC ? PC + k + 1
None
1/2
BRCS
k
Branch if Carry Set
if (C = 1) then PC ? PC + k + 1
None
1/2
BRCC
k
Branch if Carry Cleared
if (C = 0) then PC ? PC + k + 1
None
1/2
BRSH
k
Branch if Same or Higher
if (C = 0) then PC ? PC + k + 1
None
1/2
BRLO
k
Branch if Lower
if (C = 1) then PC ? PC + k + 1
None
1/2
BRMI
k
Branch if Minus
if (N = 1) then PC ? PC + k + 1
None
1/2
BRPL
k
Branch if Plus
if (N = 0) then PC ? PC + k + 1
None
1/2
BRGE
k
Branch if Greater or Equal, Signed
if (N ?V= 0) then PC ? PC + k + 1
None
1/2
BRLT
k
Branch if Less Than Zero, Signed
if (N ?V= 1) then PC ? PC + k + 1
None
1/2
BRHS
k
Branch if Half Carry Flag Set
if (H = 1) then PC ? PC + k + 1
None
1/2
BRHC
k
Branch if Half Carry Flag Cleared
if (H = 0) then PC ? PC + k + 1
None
1/2
BRTS
k
Branch if T Flag Set
if (T = 1) then PC ? PC + k + 1
None
1/2
BRTC
k
Branch if T Flag Cleared
if (T = 0) then PC ? PC + k + 1
None
1/2
BRVS
k
Branch if Overflow Flag is Set
if (V = 1) then PC ? PC + k + 1
None
1/2
BRVC
k
Branch if Overflow Flag is Cleared
if (V = 0) then PC ? PC + k + 1
None
1/2
BRIE
k
Branch if Interrupt Enabled
if ( I = 1) then PC ? PC + k + 1
None
1/2
BRID
k
Branch if Interrupt Disabled
if ( I = 0) then PC ? PC + k + 1
None
1/2
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