PIC18LF4331T-I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC18LF4331T-I/SO

28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D

Microchip Technology 

PIC18F2331/2431/4331/4431

TSTFSZ

Test f, Skip if 0

Syntax:

[ label ] TSTFSZ f [,a]

Operands:

0  f  255

a  [0,1]

Operation:

skip if f = 0

Status Affected:

None

Encoding:

0110 011a ffff ffff

Description:

If ‘f’ = 0, the next instruction, fetched

during the current instruction execution,

is discarded and a NOP is executed,

making this a two-cycle instruction. If ‘a’

is ‘0’, the Access Bank will be selected,

overriding the BSR value. If ‘a’ is ‘1’,

then the bank will be selected as per

the BSR value.

Words:

1

Cycles:

1(2)

Note: 3 cycles if skip and followed

by a 2-word instruction.

Q Cycle Activity:

Q1

Q2

Q3

Decode

Read

register ‘f’

Process

Data

If skip:

Q1

Q2

Q3

No

operation

No

operation

No

operation

If skip and followed by 2-word instruction:

Q1

Q2

Q3

No

operation

No

operation

No

operation

No

operation

No

operation

No

operation

Q4

No

operation

Q4

No

operation

Q4

No

operation

No

operation

Example:

HERE TSTFSZ CNT

NZERO :

ZERO :

Before Instruction

PC = Address (HERE)

After Instruction

If CNT

PC

If CNT

PC

= 0x00,

= Address (ZERO)

 0x00,

= Address (NZERO)

XORLW

Syntax:

Operands:

Operation:

Status Affected:

Encoding:

Description:

Words:

Cycles:

Q Cycle Activity:

Q1

Decode

Exclusive OR Literal with W

[ label ] XORLW k

0 k 255

(W) .XOR. k W

N, Z

0000 1010 kkkk kkkk

The contents of W are XORed with

the 8-bit literal, ‘k’. The result is placed

in W.

1

1

Q2

Read

literal ‘k’

Q3

Process

Data

Q4

Write to W

Example:

XORLW 0xAF

Before Instruction

W

= 0xB5

After Instruction

W

= 0x1A

 2010 Microchip Technology Inc.

DS39616D-page 323

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