| ||||
| Home Products Download Events Support | ||||
Technical Support
On-Line Manuals
Ax51 User's Guide
Ax51 Introduction Assembling Programs 
Writing Assembly Programs Assembly Statements 
Controls Instructions Comments Symbols and Symbol Names Labels Using Operands and Expressions Special Assembler Symbols Immediate Data Memory Access DATA BIT IDATA EDATA XDATA CODE Program Addresses Expressions and Operators Numbers Characters Character Strings Location Counter Operators ( ) * + - / < <= <> == > >= AND BYTEx EQ GT GTE HIGH LOW LT LTE MBYTE MOD NE NOT OR SHL SHR WORDx XOR Class Operators Expressions Expression Classes Relocatable Expressions Simple Relocatable Expressions Extended Relocatable Expressions Expressions Example Control Statements Macro Processor Error Messages AppendixMemory Access
A memory access reads or writes a value in to the various memory spaces of the A51 system.
Direct memory access encodes the memory address in the instruction that to reads or writes the memory. With direct memory accesses, you may access variables in the memory class DATA and BIT.
Indirect memory accesses uses the content of a register in the instruction that reads or writes into the memory. With indirect address operands it is possible to access all memory classes of the A51.
The examples in DATA and BIT show how to access the different memory classes of an A51 system.
| Contact Site Map Press Privacy | Copyright © 2012 ARM Ltd and ARM Germany GmbH. All rights reserved. |
