PIC16F5X datasheet(51/88 Pages) MICROCHIP

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DS41213D-page 49

PIC16F5X

MOVWF

Move W to f

Syntax:

[ label ]

MOVWF

Operands:

≤ f ≤ 31

Operation:

(W)

→ (f)

Status Affected:

None

Encoding:

0000

001f

ffff

Description:

Move data from the W register to

Words:

Cycles:

Example:

MOVWF

TEMP_REG

Before Instruction

TEMP_REG =

0xFF

0x4F

After Instruction

TEMP_REG =

0x4F

NOP

No Operation

Syntax:

[ label ]

NOP

Operands:

None

Operation:

No operation

Status Affected:

None

Encoding:

0000

Description:

No operation.

Words:

Cycles:

Example:

NOP

OPTION

Load OPTION Register

Syntax:

[ label ]

OPTION

Operands:

None

Operation:

(W)

→ OPTION

Status Affected:

None

Encoding:

0000

0010

Description:

The content of the W register is

loaded into the Option register.

Words:

Cycles:

Example:

OPTION

Before Instruction

0x07

After Instruction

OPTION

0x07

RETLW

Return with Literal in W

Syntax:

[ label ]

RETLW k

Operands:

≤ k ≤ 255

Operation:

→ (W);

TOS

→ PC

Status Affected:

None

Encoding:

1000

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:

Cycles:

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

0x07

After Instruction

value of k8

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