ATPL00B datasheet(32/152 Pages) ATMEL

32 / 152 page

Atmel ATPL00B [datasheet]

43028A-ATPL - 9/12

Table 4-4.

Logical Instructions

MNEMONIC

OPERATION

ADDRESSING MODES

EXECUTION

DIR

IND

REG

IMM

TIME (mc)

ANL A,<byte>

A = A.AND. <byte>

ANL <byte>,A

<byte> = <byte> .AND.A

ANL <byte>,#data

<byte> = <byte> .AND.#data

ORL A,<byte>

A = A.OR.<byte>

ORL <byte>,A

<byte> = <byte> .OR.A

ORL <byte>,#data

<byte> = <byte> .OR.#data

XRL A,<byte>

A = A.XOR. <byte>

XRL <byte>,A

<byte> = <byte> .XOR.A

XRL <byte>,#data

<byte> = <byte> .XOR.#data

CLR A

A = 00H

Accumulator only

CPL A

A = .NOT.A

Accumulator only

RL A

Rotate ACC Left 1 bit

Accumulator only

RLC A

Rotate Left through Carry

Accumulator only

RR A

Rotate ACC Right 1 bit

Accumulator only

RRC A

Rotate Right through Carry

Accumulator only

SWAP A

Swap Nibbles in A

Accumulator only

Note that Boolean operations can be performed on any byte in the internal Data Memory space without going through

the Accumulator. The XRL <byte>, #data instruction, for example, offers a quick and easy way to invert port bits, as in

XRL P1, #0FFH.

If the operation is in response to an interrupt, not using the Accumulator saves time and effort to push it onto the stack

in the service routine.

The Rotate instructions (RL, A, RLC A, etc.) shift the Accumulator 1 bit to the left or right. For a left rotation, the MSB

rolls into the LSB position. For a right rotation, the LSB rolls into the MSB position.

The SWAP A instruction interchanges the high and low nibbles within the Accumulator. This is a useful operation in

BCD manipulations.

ATPL00B Datasheet(PDF) 32 Page - ATMEL Corporation

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