PIC16LC622AT-04/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16LC622AT-04/SO

EPROM-Based 8-Bit CMOS Microcontrollers

Microchip Technology 

PIC16C62X

DECFSZ

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Example

Decrement f, Skip if 0

[ label ] DECFSZ f,d

0 ≤ f ≤ 127

d ∈ [0,1]

(f) - 1 → (dest); skip if result = 0

None

00

1011 dfff ffff

The contents of register 'f' are

decremented. If 'd' is 0, the result

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

1, the result is placed back in

register 'f'.

If the result is 0, the next instruc-

tion, which is already fetched, is

discarded. A NOP is executed

instead making it a two-cycle

instruction.

1

1(2)

HERE

DECFSZ

GOTO

CONTINUE •

•

•

CNT, 1

LOOP

Before Instruction

PC = address HERE

After Instruction

CNT = CNT - 1

if CNT = 0,

PC = address CONTINUE

if CNT ≠ 0,

PC = address HERE+1

GOTO

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Example

Unconditional Branch

[ label ] GOTO k

0 ≤ k ≤ 2047

k → PC<10:0>

PCLATH<4:3> → PC<12:11>

None

10

1kkk kkkk kkkk

GOTO is an unconditional branch.

The eleven bit immediate value is

loaded into PC bits <10:0>. The

upper bits of PC are loaded from

PCLATH<4:3>. GOTO is a two-

cycle instruction.

1

2

GOTO THERE

After Instruction

PC = Address THERE

 2003 Microchip Technology Inc.

INCF

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Example

Increment f

[ label ] INCF f,d

0 ≤ f ≤ 127

d ∈ [0,1]

(f) + 1 → (dest)

Z

00

1010 dfff ffff

The contents of register 'f' are

incremented. If 'd' is 0, the result

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

1, the result is placed back in

register 'f'.

1

1

INCF CNT, 1

Before Instruction

CNT =

Z

=

After Instruction

CNT =

Z

=

0xFF

0

0x00

1

DS30235J-page 67

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