The 68HC12 ( or HC12 for short) is a microcontroller family from Freescale Semiconductor. Originally introduced in the mids, the architecture is an. Has several new addressing modes added. • Accesses additional memories externally. Here is an overview of the HCS12 CPU architecture. The HCS12 CPU is. COM/SEMICONDUCTORS. HCS Microcontrollers. S12CPUV2/D. Rev. 0 In the M68HC12 and HCS12 architecture, all memory and input/output. (I/O) are.

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Published by Marian Hall Modified over 2 years ago. Hcss12 Addressing and Extended Addressing. Examples, using 8 bits: Students not only develop a strong foundation of Assembly language programming, they develop a comprehensive understanding of HCS12 interfacing. Chapter 7 Low-Level Programming Languages. One contains only data while the other is containing only program code.

Addressing Modes — where archtecture we? Calculating Branch Destinations – Valid range: Trace Recording for Embedded Systems: We use cookies to give you the best possible experience. Ramadan Al-Azhar University Lecture 3. Many programs written mainly in a high level language have sections of assembly code. The data archotecture is supplied as the operand.

Immediate — Data itself is part of the instruction. Each location within this memory has an address by which we identify it.


Data Sheets show more. B6 30 In the instruction LDAA 5, the operand is 5. Table of contents Introduction to Computing Archjtecture 1: If you wish to download it, please recommend it to your friends in any social system.

We think you have liked this presentation. Computer Hardware Organization What is a Computer? B6 30 00 Control Unit Basic Architecture. Review questions are provided at the end of each section to reinforce the main points of the section.

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EET Unit 2. HCS12 Architecture

Repeat the instruction sequence for the appropriate number of times. ABA is very simple. Do conditionCode practice sheet for N, V bits. Source Form Operation Addr. Looking for beautiful books? CCR always holds architefture mask bits adchitecture five status flags. The HCS12 uses a bit address bus. Memory Addresses Every computer system has memory, where programs and data are stored.

Therefore, we need to copy the memory content into an accumulator, add 3 to it, and then store the sum back to the same memory location. But only some instructions affect these flag bits: But this address is two bytes long, so we can reach any memory location.

EET 2261 Unit 2 HCS12 Architecture

Other instructions are more complicated and have additional things you need to type, explained here: To use this website, you must agree to our Privacy Policyincluding cookie policy.


We can notify you when this item is back in stock. This happens when either: The ABA instruction always uses the inherent addressing mode. Inherent — not really an addressing archiecture, there is no memory address jcs12. Write an instruction sequence to create a delay of 10 sec.

Visit our Beautiful Books page and find lovely books for kids, photography lovers and more. Memory Map Programmers must pay attention to where in memory their programs and data are stored.

Introduction to Assembly Language.

In this notation, the leftmost bit is the sign bit. Homework 7 and Lab 7 due next week. Therefore, within the range of possible addresses, only some can be used by your programs.

EET Unit 2 HCS12 Architecture – ppt video online download

Each instruction performs a simple operation and executes quickly. Introduction to Assembly Language.

It is an ideal source for those wanting to move away from 68HC11 to a more powerful chip.