PIC18LF2431-I/ML View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18LF2431-I/ML

28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D

Microchip Technology 

PIC18F2331/2431/4331/4431

DAW

Syntax:

Operands:

Operation:

Decimal Adjust W Register

[ label ] DAW

None

If [W<3:0> > 9] or [DC = 1] then,

(W<3:0>) + 6  W<3:0>;

else,

(W<3:0>)  W<3:0>;

If [W<7:4> 9] or [C = 1] then,

(W<7:4>) + 6  W<7:4>;

else,

(W<7:4>)  W<7:4>

Status Affected:

C, DC

Encoding:

0000 0000 0000 0111

Description:

DAW adjusts the 8-bit value in W,

resulting from the earlier addition of two

variables (each in packed BCD format)

and produces a correct packed BCD

result. The Carry bit may be set by DAW

regardless of its setting prior to the DAW

instruction.

Words:

1

Cycles:

1

Q Cycle Activity:

Q1

Decode

Example 1:

Q2

Read

register W

DAW

Q3

Process

Data

Q4

Write

W

Before Instruction

W

=

C

=

DC

=

0xA5

0

0

After Instruction

W

=

C

=

DC

=

0x05

1

0

Example 2:

Before Instruction

W

=

C

=

DC

=

After Instruction

W

=

C

=

DC

=

0xCE

0

0

0x34

1

0

DECF

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Q Cycle Activity:

Q1

Decode

Decrement f

[ label ] DECF f [,d [,a]]

0  f  255

d  [0,1]

a  [0,1]

(f) – 1  dest

C, DC, N, OV, Z

0000 01da ffff ffff

Decrement 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,

overriding the BSR value. If ‘a’ = 1, then

the bank will be selected as per the

BSR value.

1

1

Q2

Read

register ‘f’

Q3

Process

Data

Q4

Write to

destination

Example:

DECF

Before Instruction

CNT

= 0x01

Z

=0

After Instruction

CNT

=

Z

=

0x00

1

CNT,

DS39616D-page 302

 2010 Microchip Technology Inc.

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