PIC16F84AT-04 데이터 시트보기 (PDF) - Microchip Technology

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PIC16F84AT-04

18-pin Flash/EEPROM 8-Bit Microcontrollers

Microchip Technology 

PIC16F8X

CLRF

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Q Cycle Activity:

Clear f

[label] CLRF f

0 ≤ f ≤ 127

00h → (f)

1→Z

Z

00 0001 1fff ffff

The contents of register 'f' are cleared

and the Z bit is set.

1

1

Q1

Q2

Q3

Q4

Decode

Read

register

'f'

Process Write

data register 'f'

Example

CLRF

FLAG_REG

Before Instruction

FLAG_REG =

After Instruction

FLAG_REG =

Z

=

0x5A

0x00

1

CLRW

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Q Cycle Activity:

Clear W

[ label ] CLRW

None

00h → (W)

1→Z

Z

00 0001 0xxx xxxx

W register is cleared. Zero bit (Z) is

set.

1

1

Q1

Q2

Q3

Q4

Decode No-Opera Process Write to

tion

data

W

Example

CLRW

Before Instruction

W = 0x5A

After Instruction

W = 0x00

Z=1

CLRWDT

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Q Cycle Activity:

Clear Watchdog Timer

[ label ] CLRWDT

None

00h → WDT

0 → WDT prescaler,

1 → TO

1 → PD

TO, PD

00 0000 0110 0100

CLRWDT instruction resets the Watch-

dog Timer. It also resets the prescaler

of the WDT. Status bits TO and PD are

set.

1

1

Q1

Q2

Q3

Q4

Decode No-Opera Process

tion

data

Clear

WDT

Counter

Example

CLRWDT

Before Instruction

WDT counter =

After Instruction

WDT counter =

WDT prescaler=

TO

=

PD

=

?

0x00

0

1

1

DS30430C-page 58

© 1998 Microchip Technology Inc.

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