CDP6805E2CE 查看數據表（PDF） - InnovASIC, Inc

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CDP6805E2CE

Microprocessor Unit

InnovASIC, Inc 

IA6805E2

Microprocessor Unit

Data Sheet

As of Production Version 00

Instruction Set Description

The MPU has 61 basic instructions divided into 5 types. The 5 types are Register/memory, read-

modify-write, branch, bit manipulation, and control.

Register/Memory Instructions:

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

index register and the other is obtained from memory. The jump unconditional (JMP) and

jump to subroutine (JSR) instructions have no register operand.

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

Read-Modify-Write Instructions:

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

write the modified value back to memory or the register.

Function

Increment

Decrement

Clear

Complement

Negate (2's complement)

Rotate Left Thru Carry

Rotate Right Thru Carry

Logical shift left

Logical shift right

Arithmetic shift right

Test for negative or zero

Copyright © 2002

innovASIC



The End of Obsolescence™

ENG21108140100

Page 19 of 31

Mnemonic

INC

DEC

CLR

COM

NEG

ROL

ROR

LSL

LSR

ASR

TST

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