Datasheet

317
ATmega48PA/88PA/168PA [DATASHEET]
9223F–AVR–04/14
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 One’s complement Rd  0xFF  Rd Z,C,N,V 1
NEG Rd Two’s 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
JMP
(1)
k Direct jump PC k None 3
RCALL k Relative subroutine call PC  PC + k + 1 None 3
ICALL Indirect call to (Z) PC  Z None 3
CALL
(1)
k Direct subroutine call PC  k None 4
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
Note: 1. These instructions are only available in the Atmel ATmega168PA.