PIC16LCR64A-04E/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LCR64A-04E/SO

8-Bit CMOS Microcontrollers

Microchip Technology 

PIC16C6X

NOP

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Q Cycle Activity:

No Operation

[ label ] NOP

None

No operation

None

00 0000 0xx0 0000

No operation.

1

1

Q1

Q2

Q3

Q4

Decode

No-

No-

No-

Operation Operation Operation

Example

NOP

OPTION

Load Option Register

Syntax:

[ label ] OPTION

Operands:

None

Operation:

(W) → OPTION

Status Affected: None

Encoding:

00 0000 0110 0010

Description:

The contents of the W register are

loaded in the OPTION register. This

instruction is supported for code com-

patibility with PIC16C5X products.

Since OPTION is a readable/writable

register, the user can directly address

it.

Words:

1

Cycles:

1

Example

To maintain upward compatibility

with future PIC16CXX products, do

not use this instruction.

RETFIE

Return from Interrupt

Syntax:

[ label ] RETFIE

Operands:

None

Operation:

TOS → PC,

1 → GIE

Status Affected: None

Encoding:

00 0000 0000 1001

Description:

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.

Words:

1

Cycles:

2

Q Cycle Activity:

Q1

Q2

Q3

Q4

1st Cycle Decode

No-

Set the Pop from

Operation GIE bit the Stack

2nd Cycle No-

No-

No-

No-

Operation Operation Operation Operation

Example

RETFIE

After Interrupt

PC = TOS

GIE = 1

© 1997 Microchip Technology Inc.

DS30234D-page 153

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