Collect

PIC instruction

instruction			Instruction description		influence flag	Reference page number
BYTE-ORIENTED FILE REGISTER OPERATIONS
ADDWF		f, d, a	Add W and f and put the result in W or f.		C, DC, Z, OV, N	7
ADDWFC		f, d, a	Add W and C and put the result in W or f.		C, DC, Z, OV, N	10
ANDWF		f, d, a	Perform an AND operation on W and f, and put the result in W or f.		Z,N	14
CLRF		f, a	Clear all values in f to 0.		Z	31
COMF		f, d, a	Complement the value in f and place the result in W or f.		Z,N	33
CPFSEQ		f, a	If the values of f and W are equal, the next instruction is skipped.		none	35
CPFSGT		f, a	If f is greater than W, skip the next instruction.		none	36
CPFSLT		f, a	If f is less than W, skip the next instruction.		none	37
DECF		f, d, a	Decrement the value in f by 1 and place the result in W or f.		C, DC, Z, OV, N	40
DECFSZ		f, d, a	Decrement the value in f by 1. If it is 0, skip the next instruction and put the result in W or f.		none	43
DCFSNZ		f, d, a	Decrement the value in f by 1. If it is not 0, skip the next instruction and put the result in W or f.		none	45
INCF		f, d, a	Add 1 to the value in f and place the result in W or f.		C, DC, Z, OV, N	48
INCFSZ		f, d, a	Add 1 to the value in f. If it is 0, skip the next instruction and put the result in W or f.		none	51
INFSNZ		f, d, a	Add 1 to the value in f. If it is not 0, skip the next instruction and put the result in W or f.		none	53
IORWF		f, d, a	Perform an OR operation on W and f, and put the result into W or f.		Z,N	57
MOVF		f, d, a	Move the value in f to W or f.		Z,N	61
MOVFF			Move the data inside .		none	63
MOVWF		f, a	Move the value in W to f.		none	66
MULWF		f, a	Multiply W and f.		none	68
NEGF		f, a	Take the 2's complement of the value in f.		C, DC, Z, OV, N	70
RLCF		f, d, a	Move the value in f to the left together with C, and put the result in W or f.		C, Z, N	80
RLNCF		f, d, a	Move the value in f to the left and put the result in W or f.		Z,N	82
RRCF		f, d, a	Move the value in f right together with C, and put the result into W or f.		C, Z, N	84
RRNCF		f, d, a	Move the value in f right and put the result in W or f.		Z,N	86
SETF		f, a	Set the value in f to 0xFF.		none	88
SUBFWB		f, d, a	Subtract C and f from the value in W and place the result in W or f.		C, DC, Z, OV, N	90
SUBWF		f, d, a	Subtract f from the value in W and place the result in W or f.		C, DC, Z, OV, N	94
SUBWFB		f, d, a	Subtract W and C from the value in f and place the result in W or f.		C, DC, Z, OV, N	96
SWAPF		f, d, a	Swap the high 4 bits and low 4 bits of the value in f, and place the result in W or f.		none	98
TSTFSZ		f, a	Test whether the value in f is equal to 0. If it is 0, skip the next instruction.		none	105
XORWF		f, d, a	Perform XOR operation on W and f, and put the result into W or f.		Z,N	108
Bit operation instructions (BIT-ORIENTED FILE REGISTER OPERATIONS)
BCF		f, b, a	Set a certain bit in f to 0.		none	17
BSF		f, b, a	Set a certain bit in f to 1.		none	twenty four
BTFSC		f, b, a	Test whether the value of a certain bit in f is equal to 0. If it is 0, skip the next instruction.		none	25
BTFSS		f, b, a	Test whether the value of a certain bit in f is equal to 1. If it is 1, skip the next instruction.		none	26
BTG		f, d, a	Perform NOT operation on a certain bit in f.		none	27
Note:	Ff represents the temporary register.			Fd indicates where the data is stored, d = 0 indicates it is stored in the W accumulator; d = 1 indicates it is stored in the f register.
	Fb represents the b-th bit of the temporary register.
	Fk represents an 8-bit constant.			Fa indicates which memory location the data is stored in. a = 0 indicates that it is placed in the current memory location; a = 1 indicates that it is placed in the memory location specified in the BSR register.
	Fn represents the address of the program memory.

PIC18 Series Family Instructions Quick Index (continued)

instruction			Instruction description		influence flag	Reference page number
Program flow control instructions (CONTROL OPERATIONS)
B.C.		n	If C = 1, jump to address n.		none	16
BN		n	If N = 1, jump to address n.		none	18
BNC		n	If C = 0, jump to address n.		none	19
BNN		n	If N = 0, jump to address n.		none	20
BNOV		n	If OV = 0, jump to address n.		none	twenty one
BNZ		n	If Z = 0, jump to address n.		none	twenty two
BOV		n	If OV = 1, jump to address n.		none	28
BRA		n	Unconditionally jump to address n ( ).		none	twenty three
BZ		n	If Z = 1, jump to address n.		none	29
CALL		n, s	Store the PC value of the next instruction to the top level of the stack and jump to address n ( ).		none	30
CLRWDT			Clear the watchdog timer to 0.		none	32
DAW			Make BCD adjustments to the values in W.		none	38
GOTO		n	Unconditionally jump to address n ( ).		none	47
NOP			Empty command.		none	72
POP			Take out the value at the top of the stack.		none	73
PUSH			Store the PC value of the next instruction to the top level of the stack.		none	74
RCALL		n	Store the PC value of the next instruction to the top level of the stack and jump to address n ( ).		none	75
RESET			Use software to reset the system.		none	76
RETFIE		s	The interrupt subroutine returns to the main program, and the value at the top of the stack is taken out and placed in the PC, and the main program starts execution from the current PC value.		none	77
RETURN		s	Return to the main program from the sub-program, take out the value at the top of the stack and put it into the PC, and the main program starts executing from the current PC value.		none	79
SLEEP			Go to sleep.		none	89
Note:	Ff represents the temporary register.			Fd indicates where the data is stored, d = 0 indicates it is stored in the W accumulator; d = 1 indicates it is stored in the f register.
	Fb represents the b-th bit of the temporary register.
	Fk represents an 8-bit constant. Fn represents the address of the program memory.			Fa indicates which memory location the data is stored in. a = 0 indicates that it is placed in the current memory location; a = 1 indicates that it is placed in the memory location specified in the BSR register.

PIC18 Series Family Instructions Quick Index (continued)

instruction			Instruction description		influence flag	Reference page number
Immediate constant addressing (LITERAL OPERATIONS)
ADDLW		k	Add the constant k and W.		C, DC, Z, OV, N	4
ANDLW		k	Do an AND operation with the constant k and W.		Z,N	12
IORLW		k	Do an OR operation with the constant k and W.		Z,N	55
LFSR		f,k	Move the constant k (12-bit) to the f-th FSR register (f = 0 ~ 2).		none	59
MOVLB		k	Move the constant k to the BSR register.		none	64
MOVL		k	Move the constant k to W.		none	65
MULLW		k	Multiply the constant k and W.		none	67
RETLW		k	Take out the value of the top layer of the stack and put it into PC, and set the value of W to k ( ), and the main program starts executing from the current PC value.		none	78
SUBLW		k	Subtract the constant k from W.		C, DC, Z, OV, N	92
XORLW		k	Perform XOR operation on constant k and W.		Z,N	106
Program memory read and write instructions (DATA MEMORY <-> PROGRAM MEMORY OPERATIONS)
TBLRD*			Using the contents of the TBLPTRH and TBLPTRL registers as address pointers, read the contents of the program memory into the TABLAT register.		none	99
TBLRD*+			Using the contents of the TBLPTRH and TBLPTRL recorders as address pointers, read the contents of the program memory into the TABLAT register, and then automatically add 1 to the address pointer.		none	99
TBLRD*-			Using the contents of the TBLPTRH and TBLPTRL recorders as address pointers, read the contents of the program memory into the TABLAT register, and then automatically decrement the address pointer by 1.		none	99
TBLRD+*			First add 1 to the TBLPTRH and TBLPTRL recorders, and then use the contents of the TBLPTRH and TBLPTRL recorders as address pointers to read the contents of the program memory into the TABLAT register.		none	99
TBLWT*			Using the contents of the TBLPTRH and TBLPTRL registers as address pointers, write the value in the TABLAT register into the program memory.		none	102
TBLWT*+			Using the contents of the TBLPTRH and TBLPTRL registers as address pointers, write the value in the TABLAT register into the program memory, and then automatically increase the address pointer by 1.		none	102
TBLWT*-			Using the contents of the TBLPTRH and TBLPTRL recorders as the address pointer, write the value in the TABLAT register into the program memory, and then automatically decrement the address pointer by 1.		none	102
TBLWT+*			First add 1 to the TBLPTRH and TBLPTRL recorders, and then use the contents of the TBLPTRH and TBLPTRL recorders as address pointers to write the value in the TABLAT register into the program memory.		none	102
Note:	Ff represents the temporary register.			Fd indicates where the data is stored, d = 0 indicates it is stored in the W accumulator; d = 1 indicates it is stored in the f register.
	Fb represents the b-th bit of the temporary register.
	Fk represents an 8-bit constant. Fn represents the address of the program memory.			Fa indicates which memory location the data is stored in. a = 0 indicates that it is placed in the current memory location; a = 1 indicates that it is placed in the memory location specified in the BSR register.

Command name: ADDLW

Original meaning: ADD literal to W

Syntax: [label] ADDLW k

Operator:

Operation description: (W) + K -> W

Impact flags: N, OV, C, DC, Z

Instruction description: Add the value in the W accumulator to the k value, and put the operation result back into the W accumulator.

Category: Immediate constant addressing method.

Group: Mathematical operation addition instructions.

Example 1:

ADDLW 0x11; Add the value of 0x11 to the W accumulator, and put the result back into the W accumulator.

Before execution:

W = 0x1F; Assume that the value of W accumulator before execution is 0x1F.

N = OV = C = DC = Z = 0; Assume that the values of the status register before execution are all 0.

After execution:

W = 0x30; After execution, the value of W accumulator is 0x30.

N = OV = C = 0, DC = 1; the half-carry flag is equal to 1, because a carry occurs after the low four bits are added, so the half-carry flag DC is equal to 1 and the status of the other flags remains unchanged.

Example 2:

ADDLW 0x11; Add the value of 0x11 to the W accumulator, and put the result back into the W accumulator.

Before execution:

W = 0x7F; Assume that the value of W accumulator before execution is 0x7F.

N = OV = C = DC = Z = 0; Assume that the values of the status register before execution are all 0.

After execution:

W = 0x90; after execution, the value of W accumulator is 0x90.

N = OV = DC = 1, Z = C = 0; the half-carry flag DC is equal to 1, because a carry occurs after the low four bits are added; the overflow flag OV is equal to 1, because after the two numbers are added, the third A carry situation occurs in 7 bits; the negative flag N is equal to 1, because the result after adding the two numbers is greater than 127, and because 2's complement is used for the operation, the result greater than 127 is considered a negative sign.

Example three:

[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11]

Reference address：PIC18 Series Family Instructions Quick Index

Previous article：Ultrasonic PIC microcontroller C program
Next article：Single chip microcomputer EC1 digital rotary encoder simulation program

Popular Resources
Popular amplifiers

PIC18 Series Family Instructions Quick Index

ADDLW 0x11; Add the value of 0x11 to the W accumulator, and put the result back into the W accumulator.

W = 0x1F; Assume that the value of W accumulator before execution is 0x1F.

N = OV = C = DC = Z = 0; Assume that the values ​​of the status register before execution are all 0.

W = 0x30; After execution, the value of W accumulator is 0x30.

N = OV = C = 0, DC = 1; the half-carry flag is equal to 1, because a carry occurs after the low four bits are added, so the half-carry flag DC is equal to 1 and the status of the other flags remains unchanged.

ADDLW 0x11; Add the value of 0x11 to the W accumulator, and put the result back into the W accumulator.

W = 0x7F; Assume that the value of W accumulator before execution is 0x7F.

N = OV = C = DC = Z = 0; Assume that the values ​​of the status register before execution are all 0.

W = 0x90; after execution, the value of W accumulator is 0x90.

N = OV = C = DC = Z = 0; Assume that the values of the status register before execution are all 0.

N = OV = C = DC = Z = 0; Assume that the values of the status register before execution are all 0.