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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Flowcharts and Pseudocode Appendix E: The data itself is supplied as the operand.

A group of instruction is called a program. But only some instructions affect these flag bits: To make this website work, we log user data and share it with processors. Share buttons are a little bit lower. Home Contact Us Help Free delivery worldwide. The HCS12 uses a bit address bus. ABA is very simple. About project SlidePlayer Terms of Service.

Table architecturf contents Introduction to Computing Chapter 1: Direct Addressing and Extended Addressing. architectute

The ABA instruction always uses the inherent addressing mode. Introduction to Assembly Language.


EET Unit 2 HCS12 Architecture – ppt video online download

Many programs written mainly in a high level language have sections of assembly code. The Best Books of Published by Marian Hall Modified over 2 years ago.

Addressing Modes — where are we?

Students not only develop a strong foundation of Assembly language programming, they develop a comprehensive understanding of HCS12 interfacing. Some symbols used in this column: Some abbreviations used in this column: Other instructions are more complicated and have additional things you need to type, explained here: Homework 2 and Lab 2 due next week. B6 30 We think you have liked this presentation.

About project SlidePlayer Terms of Service. My presentations Profile Feedback Log out. This book can also be used by practicing technicians, hardware engineers, computer scientists, and hobbyists. The number of letters in that column indicates the number of E cycles that a specific instruction takes to complete the execution.

ABA This table uses many abbreviations and special symbols. Relative — Offset relative to the instruction itself specifies a branch target address. Registration Forgot your password? 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. Share buttons are a little bit lower. Extended — bit absolute address in the instruction.


LDAA loads an 8-bit number into A. Repeat the instruction sequence for the appropriate number of times. Immediate — Data itself is part of the instruction. A memory location cannot be the destination of an ADD instruction. PC always holds the address of the next instruction to be executed. History and Features Chapter 2: Each instruction performs a simple operation and executes quickly.

HCS12 ARCHITECTURE Razvan Bogdan Embedded Systems.

Product details Format Hardback pages Dimensions By using our website you agree to our use of cookies. It is an ideal source for those wanting to move away from 68HC11 to a more powerful chip. Used only with branch instructions.