PIC16C925T-SSLASHCL datasheet(132/182 Pages) MICROCHIP

132 / 182 page

PIC16C925/926

DS39544A-page 130

Preliminary

 2001 Microchip Technology Inc.

SWAPF

Swap Nibbles in f

Syntax:

[ label ] SWAPF f [,d]

Operands:

≤ f ≤ 127

∈ [0,1]

Operation:

(f<3:0>)

→ (destination<7:4>),

(f<7:4>)

→ (destination<3:0>)

Status Affected:

None

Encoding:

1110

dfff

ffff

Description:

The upper and lower nibbles of reg-

ister ’f’ are exchanged. If ’d’ is 0, the

result is placed in W register. If ’d’ is

1, the result is placed in register ’f’.

Words:

Cycles:

Q Cycle Activity:

Decode

Read

Process

data

Write to

destination

Example

SWAPF

REG,

Before Instruction:

REG1

0xA5

After Instruction:

REG1

0xA5

0x5A

TRIS

Load TRIS Register

Syntax:

[ label ] TRIS

Operands:

≤ f ≤ 7

Operation:

(W)

→ TRIS register f;

Status Affected:

None

Encoding:

0000

0110

0fff

Description:

The instruction is supported for

code compatibility with the

PIC16C5X products. Since TRIS

registers are readable and writ-

able, the user can directly address

them.

Words:

Cycles:

Example

To maintain upward compatibil-

ity with future PIC16CXXX

products, do not use this

instruction.

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