PIC16F627-04E/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F627-04E/SO

FLASH-Based 8-Bit CMOS Microcontroller

Microchip Technology 

PIC16F62X

RETLW

Return with Literal in W

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Example

TABLE

[ label ] RETLW k

0 ≤ k ≤ 255

k → (W);

TOS → PC

None

11

01xx kkkk kkkk

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.

1

2

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 = 0x07

After Instruction

W = value of k8

RETURN

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Example

Return from Subroutine

[ label ] RETURN

None

TOS → PC

None

00

0000 0000 1000

Return from subroutine. The

stack is POPed and the top of

the stack (TOS) is loaded into

the program counter. This is a

two-cycle instruction.

1

2

RETURN

After Interrupt

PC = TOS

RLF

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Rotate Left f through Carry

[ label ] RLF f,d

0 ≤ f ≤ 127

d ∈ [0,1]

See description below

C

00

1101 dfff ffff

The contents of register 'f' are

rotated one bit to the left through

the Carry Flag. If 'd' is 0 the result

is placed in the W register. If 'd' is

1 the result is stored back in

register 'f'.

C

REGISTER F

Words:

Cycles:

Example

1

1

RLF

REG1, 0

Before Instruction

REG1 = 1110 0110

C =0

After Instruction

REG1 = 1110 0110

W = 1100 1100

C =1

 2003 Microchip Technology Inc.

Preliminary

DS40300C-page 117

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