PIC17C42AT-25/P View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC17C42AT-25/P

High-Performance 8-Bit CMOS EPROM/ROM Microcontroller

Microchip Technology 

PIC17C4X

NEGW

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Q Cycle Activity:

Q1

Decode

Negate W

[label] NEGW f,s

0 ≤ F ≤ 255

s ∈ [0,1]

WREG + 1 → (f);

WREG + 1 → s

OV, C, DC, Z

0010 110s ffff ffff

WREG is negated using two’s comple-

ment. If 's' is 0 the result is placed in

WREG and data memory location 'f'. If

's' is 1 the result is placed only in data

memory location 'f'.

1

1

Q2

Read

register 'f'

Q3

Execute

Q4

Write

register 'f'

and other

specified

register

Example:

NEGW REG,0

Before Instruction

WREG = 0011 1010 [0x3A],

REG = 1010 1011 [0xAB]

After Instruction

WREG = 1100 0111 [0xC6]

REG = 1100 0111 [0xC6]

NOP

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Q Cycle Activity:

Q1

Decode

No Operation

[ label ] NOP

None

No operation

None

0000 0000

No operation.

1

1

0000

0000

Q2

NOP

Q3

Execute

Q4

NOP

Example:

None.

DS30412C-page 130

© 1996 Microchip Technology Inc.

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