PIC18F258-I/SP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18F258-I/SP

28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module

Microchip Technology 

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:

Description:

0000 1111 kkkk kkkk

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

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Q Cycle Activity:

Q1

Decode

ADD W to f

[ label ] ADDWF

0 ≤ f ≤ 255

d ∈ [0,1]

a ∈ [0,1]

(W) + (f) → dest

N, OV, C, DC, Z

f [,d [,a]]

0010 01da ffff ffff

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.

1

1

Q2

Read

register ‘f’

Q3

Process

Data

Q4

Write to

destination

Example:

ADDWF

Before Instruction

W

=

REG =

After Instruction

W

=

REG =

0x17

0xC2

0xD9

0xC2

REG, W

© 2006 Microchip Technology Inc.

DS41159E-page 287

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