Datasheet

 2010 Microchip Technology Inc. DS39616D-page 289
PIC18F2331/2431/4331/4431
24.2 Instruction Set
ADDLW ADD Literal to W
Syntax: [ label ] ADDLW k
Operands: 0  k  255
Operation: (W) + k  W
Status Affected: N, OV, C, DC, Z
Encoding: 0000 1111 kkkk kkkk
Description: The contents of W are added to the
8-bit literal ‘k’ and the result is placed in
W.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal ‘k’
Process
Data
Write to
W
Example:
ADDLW 0x15
Before Instruction
W = 0x10
After Instruction
W = 0x25
ADDWF ADD W to f
Syntax: [ label ] ADDWF f [,d [,a]]
Operands: 0  f  255
d  [0,1]
a  [0,1]
Operation: (W) + (f)  dest
Status Affected: N, OV, C, DC, Z
Encoding: 0010 01da ffff ffff
Description: Add W to register, ‘f’. If ‘d’ is ‘0’, the
result is stored in W. If ‘d’ is ‘1’, the
result is stored back in register, ‘f’. If ‘a’
is ‘0’, the Access Bank will be selected.
If ‘a’ is ‘1’, the BSR is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
register ‘f’
Process
Data
Write to
destination
Example:
ADDWF REG, W
Before Instruction
W = 0x17
REG = 0xC2
After Instruction
W=0xD9
REG = 0xC2