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7 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 MUL Rd, Rr Multiply Unsigned R1:R0 Rd x Rr Z,C 2 MULS Rd, Rr Multiply Signed R1:R0 Rd x Rr Z,C 2 MULSU Rd, Rr Multiply Signed with Unsigned R1:R0 Rd x Rr Z,C 2 FMUL Rd, Rr Fractional Multiply Unsigned R1:R0 (Rd x Rr) << 1 Z,C 2 FMULS Rd, Rr Fractional Multiply Signed R1:R0 (Rd x Rr) << 1 Z,C 2 FMULSU Rd, Rr Fractional Multiply Signed with Unsigned R1:R0 (Rd x Rr) << 1 Z,C 2 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 Mnemonics Operands Description Operation Flags #Clocks
8 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 DATA TRANSFER INSTRUCTIONS MOV Rd, Rr Move Between Registers Rd Rr None 1 MOVW Rd, Rr Copy Register Word Rd+1:Rd Rr+1: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 LPM Rd, Z Load Program Memory Rd (Z) None 3 LPM Rd, Z+ Load Program Memory and Post-Inc Rd (Z), Z Z+1 None 3 SPM Store Program Memory (Z) R1:R0 None - 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 Twos Complement Overflow. V 1 V 1 CLV Clear Twos Complement Overflow V 0 V 1 SET Set T in SREG T 1 T 1 Mnemonics Operands Description Operation Flags #Clocks
9 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 MCU CONTROL INSTRUCTIONS 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
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