HC05V7GRSSLASHD datasheet(147/170 Pages) NXP

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SECTION 16: INSTRUCTION SET

Page 133

MC68HC05V7 Specification Rev. 1.0

SECTION 16

INSTRUCTION SET

The MCU has a set of 62 basic instructions. They can be divided into five different types:

paragraphs briefly explain each type. For more information on the instruction set, refer to

the

M6805 Family User’s Manual (M6805UM/AD3) or the associated MC68HC05 Data

Sheet.

16.1

Most of these instructions use two operands. One operand is either the accumulator or the

index register. The other operand is obtained from memory using one of the addressing

modes. The jump unconditional (JMP) and jump to subroutine (JSR) instructions have no

16.2

READ-MODIFY-WRITE INSTRUCTIONS

These instructions read a memory location or a register, modify or test its contents, and

write the modified value back to memory or to the register. The test for negative or zero

(TST) instruction is an exception to the read-modify-write sequence since it does not modify

the value. Do not use these read-modify-write instructions on write-only locations. Refer to

the following list of instructions.

Function

Load A from Memory

Load X from Memory

Store A in Memory

Store X in Memory

Add Memory to A

Add Memory and Carry to A

Subtract Memory

Subtract Memory from A with Borrow

AND Memory to A

OR Memory with A

Exclusive OR Memory with A

Arithmetic Compare A with Memory

Arithmetic Compare X with Memory

Bit Test Memory with A (Logical Compare)

Jump Unconditional

Jump to Subroutine

Mnemonic

LDA

LDX

STA

STX

ADD

ADC

SUB

SBC

AND

ORA

EOR

CMP

CPX

BIT

JMP

JSR

Multiply

MUL

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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