PIC18F258 Datasheet, PDF (285/384 Pages) Microchip Technology – High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN

25.2 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
Decode
Q2
Read
literal ’k’
Q3
Process
Data
Q4
Write to W
Example:
ADDLW
Before Instruction
W = 0x10
After Instruction
W = 0x25
0x15
PIC18FXX8
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’
(default). 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
Decode
Read
register ’f’
Q3
Process
Data
Q4
Write to
destination
Example:
ADDWF
Before Instruction
W
REG
= 0x17
= 0xC2
After Instruction
W
REG
= 0xD9
= 0xC2
REG, W
 2002 Microchip Technology Inc.
DS41159B-page 283