PIC18F2420/2520/4420/4520
FIGURE 24-1:
GENERAL FORMAT FOR INSTRUCTIONS
Byte-oriented file register operations
15 10
Example Instruction
9
8
7
0
ADDWF MYREG, W, B
OPCODE
d
a
f (FILE #)
d = 0for result destination to be WREG register
d = 1for result destination to be file register (f)
a = 0to force Access Bank
a = 1for BSR to select bank
f = 8-bit file register address
Byte to Byte move operations (2-word)
15
12 11
0
0
MOVFF MYREG1, MYREG2
OPCODE
f (Source FILE #)
15
12 11
1111
f (Destination FILE #)
f = 12-bit file register address
Bit-oriented file register operations
15 12 11 9 8
OPCODE b (BIT #)
7
0
BSF MYREG, bit, B
a
f (FILE #)
b = 3-bit position of bit in file register (f)
a = 0to force Access Bank
a = 1for BSR to select bank
f = 8-bit file register address
Literal operations
15
8
7
0
MOVLW 7Fh
OPCODE
k (literal)
k = 8-bit immediate value
Control operations
CALL, GOTO and Branch operations
15
8 7
0
GOTO Label
OPCODE
12 11
n<7:0> (literal)
15
0
1111
n<19:8> (literal)
n = 20-bit immediate value
15
15
8
7
0
CALL MYFUNC
OPCODE
12 11
S
n<7:0> (literal)
0
1111
S = Fast bit
n<19:8> (literal)
15
15
11 10
0
0
BRA MYFUNC
BC MYFUNC
OPCODE
n<10:0> (literal)
n<7:0> (literal)
8 7
OPCODE
© 2008 Microchip Technology Inc.
DS39631E-page 269
MICROCHIP [ MICROCHIP ]
