PIC16F54T-I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F54T-I/SO

Flash-Based, 8-Bit CMOS Microcontroller Series

Microchip Technology 

MOVWF

Move W to f

Syntax:

[ label ] MOVWF f

Operands:

0 ≤ f ≤ 31

Operation:

(W) → (f)

Status Affected: None

Encoding:

0000 001f ffff

Description:

Move data from the W register to

register ‘f’.

Words:

1

Cycles:

1

Example:

MOVWF TEMP_REG

Before Instruction

TEMP_REG =

W

=

After Instruction

TEMP_REG =

W

=

0xFF

0x4F

0x4F

0x4F

NOP

No Operation

Syntax:

Operands:

[ label ] NOP

None

Operation:

No operation

Status Affected: None

Encoding:

0000 0000

Description:

No operation.

Words:

1

Cycles:

1

Example:

NOP

0000

PIC16F5X

OPTION

Load OPTION Register

Syntax:

[ label ] OPTION

Operands:

None

Operation:

(W) → OPTION

Status Affected: None

Encoding:

0000 0000 0010

Description:

The content of the W register is

loaded into the Option register.

Words:

1

Cycles:

1

Example:

OPTION

Before Instruction

W

=

After Instruction

OPTION =

0x07

0x07

RETLW

Return with Literal in W

Syntax:

[ label ] RETLW k

Operands:

0 ≤ k ≤ 255

Operation:

k → (W);

TOS → PC

Status Affected: None

Encoding:

1000 kkkk kkkk

Description:

The W register is loaded with the

eight-bit literal ‘k’. The program

counter is loaded from the top of

the stack (the return address). This

is a two-cycle instruction.

Words:

1

Cycles:

2

Example:

TABLE

CALL TABLE;W contains

;table offset

;value.

•

;W now has table

•

;value.

•

ADDWF PC ;W = offset

RETLW k1 ;Begin table

RETLW k2 ;

•

•

•

RETLW kn ; End of table

Before Instruction

W

=

After Instruction

W

=

0x07

value of k8

© 2007 Microchip Technology Inc.

DS41213D-page 49

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