PIC18F258-ESLASHLSQTP datasheet(308/402 Pages) MICROCHIP

308 / 402 page

PIC18FXX8

DS41159E-page 306

MOVFF

Move f to f

Syntax:

[

label ]

MOVFF fs,fd

Operands:

≤ fs ≤ 4095

≤ fd ≤ 4095

Operation:

(fs) → fd

Status Affected:

None

Encoding:

1st word (source)

2nd word (destin.)

1100

1111

ffff

ffffs

ffffd

Description:

The contents of source register ‘fs’ are

moved to destination register ‘fd’.

Location of source ‘fs’ can be anywhere

in the 4096-byte data space (000h to

FFFh) and location of destination ‘fd’

can also be anywhere from 000h to

FFFh.

Either source or destination can be W

(a useful special situation).

MOVFF

is particularly useful for

transferring a data memory location to a

peripheral register (such as the transmit

buffer or an I/O port).

The MOVFF instruction cannot use the

PCL, TOSU, TOSH or TOSL as the

destination register.

The MOVFF instruction should not be

used to modify interrupt settings while

any interrupt is enabled (see page 77).

Words:

Cycles:

2 (3)

Q Cycle Activity:

Decode

Read

(src)

Process

Data

operation

Decode

operation

No dummy

read

operation

Write

(dest)

Example:

MOVFF

REG1, REG2

Before Instruction

REG1

0x33

REG2

0x11

After Instruction

REG1

0x33

REG2

0x33

MOVLB

Move Literal to Low Nibble in BSR

Syntax:

[

label ]

MOVLB k

Operands:

≤ k ≤ 255

Operation:

→ BSR

Status Affected:

None

Encoding:

0000

0001

kkkk

Description:

The 8-bit literal ‘k’ is loaded into the

Bank Select Register (BSR).

Words:

Cycles:

Q Cycle Activity:

Decode

Read literal

‘k’

Process

Data

Write

literal ‘k’ to

BSR

Example:

MOVLB

Before Instruction

BSR register

0x02

After Instruction

BSR register

0x05

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