PIC16F628A-I/SO 查看數據表（PDF） - Microchip Technology

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PIC16F628A-I/SO

Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC16F627A/628A/648A

MOVWF

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Example

Move W to f

[ label ] MOVWF f

0 ≤ f ≤ 127

(W) → (f)

None

00

0000 1fff ffff

Move data from W register to

register ‘f’.

1

1

MOVWF REG1

Before Instruction

REG1 = 0xFF

W = 0x4F

After Instruction

REG1 = 0x4F

W = 0x4F

OPTION

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Example

Load Option Register

[ label ] OPTION

None

(W) → OPTION

None

00

0000 0110 0010

The contents of the W register are

loaded in the OPTION register.

This instruction is supported for

code compatibility with PIC16C5X

products. Since OPTION is a

readable/writable register, the

user can directly address it. Using

only register instruction such as

MOVWF.

1

1

To maintain upward compatibil-

ity with future PIC® MCU

products, do not use this

instruction.

NOP

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Example

No Operation

[ label ] NOP

None

No operation

None

00

0000 0xx0

No operation.

1

1

NOP

0000

RETFIE

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Example

Return from Interrupt

[ label ] RETFIE

None

TOS → PC,

1 → GIE

None

00

0000 0000 1001

Return from Interrupt. Stack is

POPed and Top-of-Stack (TOS)

is loaded in the PC. Interrupts

are enabled by setting Global

Interrupt Enable bit, GIE

(INTCON<7>). This is a two-

cycle instruction.

1

2

RETFIE

After Interrupt

PC = TOS

GIE = 1

DS40044F-page 124

© 2007 Microchip Technology Inc.

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