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Mike McLarens' 18F Instruction Set Summary in HTML

Also available in CCS HTML, HTML and PDF. This version transcribed, and misc errors introduced, by James Newton.

18F Instruction Set Summary

Mnemonic,Operands Description Cycles 16-Bit Instruction Status Affected Notes
BYTE-ORIENTED FILE REGISTER OPERATIONS        
ADDWF f, d, a Add W and f 1 0010 01da ffff ffff C,DC,Z,OV,N 1,2
ADDWFC f, d, a Add W and Carry bit to f 1 0010 00da ffff ffff C,DC,Z,OV,N 1,2
ANDWF f, d, a AND W with f 1 0001 01da ffff ffff Z,N 1,2
CLRF f, a Clear f 1 0110 101a ffff ffff Z 2
COMF f, d, a Complement f 1 0001 11da ffff ffff Z,N 1,2
CPFSEQ f, a Compare f with W, skip = 1 (2 or 3) 0110 001a ffff ffff 4
CPFSGT f, a Compare f with W, skip > 1 (2 or 3) 0110 010a ffff ffff 4
CPFSLT f, a Compare f with W, skip < 1 (2 or 3) 0110 000a ffff ffff 1,2
DECF f, d, a Decrement f 1 0000 01da ffff ffff C,DC,Z,OV,N 1-4
DECFSZ f, d, a Decrement f, Skip if 0 1 (2 or 3) 0010 11da ffff ffff 1-4
DCFSNZ f, d, a Decrement f, Skip if Not 0 1 (2 or 3) 0100 11da ffff ffff 1,2
INCF f, d, a Increment f 1 0010 10da ffff ffff C,DC,Z,OV,N 1-4
INCFSZ f, d, a Increment f, Skip if 0 1 (2 or 3) 0011 11da ffff ffff 4
INFSNZ f, d, a Increment f, Skip if Not 0 1 (2 or 3) 0100 10da ffff ffff 1,2
IORWF f, d, a Inclusive OR W with f 1 0001 00da ffff ffff Z,N 1,2
MOVF f, d, a Move f 1 0101 00da ffff ffff Z,N 1
MOVFF fs, fd Move fs (source) 1st word to  2 1100 ffff ffff ffff 
   fd (destination) 2nd word  1111 ffff ffff ffff
MOVWF f, a Move W to f 1 0110 111a ffff ffff
MULWF f, a Multiply W with f 1 0000 001a ffff ffff
NEGF f, a Negate f 1 0110 110a ffff ffff C,DC,Z,OV,N 1,2
RLCF f, d, a Rotate Left f through Carry 1 0011 01da ffff ffff C,Z,N
RLNCF f, d, a Rotate Left f (No Carry) 1 0100 01da ffff ffff Z,N 1,2
RRCF f, d, a Rotate Right f through Carry 1 0011 00da ffff ffff C,Z,N
RRNCF f, d, a Rotate Right f (No Carry) 1 0100 00da ffff ffff Z,N
SETF f, a Set f 1 0110 100a ffff ffff
SUBFWB f, d, a Subtract f from W w/borrow 1 0101 01da ffff ffff C,DC,Z,OV,N 1,2
SUBWF f, d, a Subtract W from f 1 0101 11da ffff ffff C,DC,Z,OV,N
SUBWFB f, d, a Subtract W from f w/borrow 1 0101 10da ffff ffff C,DC,Z,OV,N 1,2
SWAPF f, d, a Swap nibbles in f 1 0011 10da ffff ffff 4
TSTFSZ f, a Test f, skip if 0 1 (2 or 3) 0110 011a ffff ffff 1,2
XORWF f, d, a Exclusive OR W with f 1 0001 10da ffff ffff Z,N
BIT-ORIENTED FILE REGISTER OPERATIONS        
BCF f, b, a Bit Clear f 1 1001 bbba ffff ffff 1,2
BSF f, b, a Bit Set f 1 1000 bbba ffff ffff 1,2
BTFSC f, b, a Bit Test f, Skip if Clear 1 (2 or 3) 1011 bbba ffff ffff 3,4
BTFSS f, b, a Bit Test f, Skip if Set 1 (2 or 3) 1010 bbba ffff ffff 3,4
BTG f, b, a Bit Toggle f 1 0111 bbba ffff ffff 1,2
CONTROL OPERATIONS        
BC n Branch if Carry 1 (2) 1110 0011 nnnn nnnn
BN n Branch if Negative 1 (2) 1110 0110 nnnn nnnn
BNC n Branch if Not Carry 1 (2) 1110 0011 nnnn nnnn
BNN n Branch if Not Negative 1 (2) 1110 0111 nnnn nnnn
BNOV n Branch if Not Overflow 1 (2) 1110 0101 nnnn nnnn
BNZ n Branch if Not Zero 2 1110 0001 nnnn nnnn
BOV n Branch if Overflow 1 (2) 1110 0100 nnnn nnnn
BRA n Branch Unconditionally 1 (2) 1101 0nnn nnnn nnnn
BZ n Branch if Zero 1 (2) 1110 0000 nnnn nnnn
CALL n, s Call subroutine 1st word 2 1110 110s kkkk kkkk
   2nd word 1111 kkkk kkkk kkkk
CLRWDT -- Clear Watchdog Timer 1 0000 0000 0000 0100 TO,PD
DAW -- Decimal Adjust W 1 0000 0000 0000 0111 C
GOTO n Goto address 1st word 2 1110 1111 kkkk kkkk
   2nd word 1111 kkkk kkkk kkkk
NOP -- No Operation 1 0000 0000 0000 0000
NOP -- No Operation (Note 4) 1 1111 xxxx xxxx xxxx 4
POP -- Pop top of return stack 1 0000 0000 0000 0110
PUSH -- Push top of return stack 1 0000 0000 0000 0101
RCALL n Relative Call 2 1101 1nnn nnnn nnnn
RESET Software device RESET 1 0000 0000 1111 1111 All
RETFIE s Return from interrupt 2 0000 0000 0001 000s GIE/GIEH,
PEIE/GIEL
RETLW k Return with literal in W 2 0000 1100 kkkk kkkk
RETURN s Return from Subroutine 2 0000 0000 0001 001s
SLEEP -- Go into Standby mode 1 0000 0000 0000 0011 TO,PD
LITERAL OPERATIONS        
ADDLW k Add literal and W 1 0000 1111 kkkk kkkk C,DC,Z,OV,N
ANDLW k AND literal with W 1 0000 1011 kkkk kkkk Z,N
IORLW k Inclusive OR literal with W 1 0000 1001 kkkk kkkk Z,N
LFSR f, k Move literal (12-bit) 2nd 2 1110 1110 00ff kkkk
  word to FSRx 1st word 1111 0000 kkkk kkkk
MOVLB k Move literal to BSR<3:0> 1 0000 0001 0000 kkkk
MOVLW k Move literal to W 1 0000 1110 kkkk kkkk
MULLW k Multiply literal with W 1 0000 1101 kkkk kkkk
RETLW k Return with literal in W 2 0000 1100 kkkk kkkk
SUBLW k Subtract W from literal 1 0000 1000 kkkk kkkk C,DC,Z,OV,N
XORLW k Exclusive OR literal with W 1 0000 1010 kkkk kkkk Z,N
DATA MEMORY <-> OPERATIONS        
TBLRD * Table Read 2 0000 0000 0000 1000
TBLRD *+ Table Read post-increment 0000 0000 0000 1001
TBLRD *- Table Read post-decrement 0000 0000 0000 1010
TBLRD +* Table Read pre-increment 0000 0000 0000 1011
TBLWT Table Write 2 0000 0000 0000 1100 5
TBLWT *+ Table Write post-increment 0000 0000 0000 1101
TBLWT *- Table Write post-decrement 0000 0000 0000 1110
TBLWT +* Table Write pre-increment 0000 0000 0000 1111

1: When a PORT register is modified as a function of itself (e.g., MOVF PORTB,1), the value used will be that value present on the pins themselves. For example, if the data latch is '1' for a pin configured as input and is driven low by an external device, the data will be written back with a '0'.
2: If this instruction is executed on the TMR0 register (and, where applicable, d = 1), the prescaler will be cleared if assigned to the Timer0 Module.
3: If Program Counter (PC) is modified or a conditional test is true, the instruction requires two cycles. The second cycle is executed as a NOP.
4: Some instructions are 2-word instructions. The second word of these instructions will be executed as a NOP, unless the first word of the instruction retrieves the information embedded in these 16 bits. This ensures that all program memory locations have a valid instruction.
5: If the Table Write starts the write cycle to internal memory, the write will continue until terminated.

f = 8-bit register file address
d = destination, W (0) or f (1)
a = access bit, (0) access bank or (1) bank selected by BSR
b = bit address within an 8-bit file register
W = WREG (accumulator)
k = literal, constant, or label
x = don't care
n = relative address (branch) or a direct address
s = Fast Call/Return select bit (0) normal, (1) fast mode
C = Carry Status bit
DC = Digit Carry Status bit
Z = Zero Status bit
OV = Overflow Status bit
N = Negative Status bit
TO = Time-out bit
PO = Power-down bit

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file: /Techref/microchip/18c/inst.htm, 30KB, , updated: 2009/9/8 14:43, local time: 2024/12/24 17:31,
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