PIC18F8520-IPT301 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18F8520-IPT301

64/80-Pin High-Performance, 256 Kbit to 1 MbitEnhanced Flash Microcontrollers with A/D

Microchip Technology 

PIC18F6520/8520/6620/8620/6720/8720

CLRF

Clear f

Syntax:

Operands:

Operation:

[ label ] CLRF f [,a]

0  f  255

a [0,1]

000h  f

1Z

Status Affected: Z

Encoding:

0110 101a ffff ffff

Description:

Clears the contents of the specified

register. 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 (default).

Words:

1

Cycles:

1

Q Cycle Activity:

Q1

Q2

Q3

Q4

Decode

Read

register ‘f’

Process

Data

Write

register ‘f’

Example:

CLRF

Before Instruction

FLAG_REG =

After Instruction

FLAG_REG =

FLAG_REG,1

0x5A

0x00

CLRWDT

Clear Watchdog Timer

Syntax:

[ label ] CLRWDT

Operands:

None

Operation:

000h  WDT,

000h  WDT postscaler,

1  TO,

1  PD

Status Affected: TO, PD

Encoding:

0000 0000 0000 0100

Description:

CLRWDT instruction resets the

Watchdog Timer. It also resets the

postscaler of the WDT. Status bits

TO and PD are set.

Words:

1

Cycles:

1

Q Cycle Activity:

Q1

Q2

Decode

No

operation

Q3

Process

Data

Q4

No

operation

Example:

CLRWDT

Before Instruction

WDT Counter

=

After Instruction

WDT Counter

=

WDT Postscaler =

TO

=

PD

=

?

0x00

0

1

1

 2003-2013 Microchip Technology Inc.

DS39609C-page 275

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