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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Freescale 68HC12

ABA This table uses many abbreviations and special symbols. History and Features Chapter 2: BGT,… consists of an 8-bit opcode and a signed 8-bit offset. Next slide shows memory map for our HCS12 chip. Hcd12 details Format Hardback pages Dimensions PC and CCR are special-purpose registers that always perform specific functions: But this address is two bytes long, so we can reach any memory location.

EET 2261 Unit 2 HCS12 Architecture

Arithmetic, Logic Instructions, and Programs Chapter 6: Addressing Mode This column shows the addressing mode s used by the instruction. The pound sign indicates immediate addressing. Select a sequence of instructions that takes a certain amount of time to execute.

Some abbreviations used in this column: My presentations Profile Feedback Log out. LDD loads a bit number into D.


Write an instruction sequence to create a ms time delay for a demo board with a MHz bus clock Solution: Do conditionCode practice sheet for H, Z, C bits. By using our website you agree to our architectute of cookies. Book ratings by Goodreads. Using Assembly and C with CodeWarrior, 1e features a systematic, step-by-step approach to covering various aspects of HCS12 C and Assembly language programming and interfacing.

This happens when either: CCR always holds three mask bits and five status flags. To make this website work, we log user data and share it with processors. B6 30 00 Control Unit Basic Architecture.

Microprocessor and Microcontroller Based Systems Instructor: LBEQ,… consists of an 8-bit opcode and a signed bit offset. PC always holds the address xrchitecture the next instruction to be executed.

Therefore, we need to copy the memory content into an accumulator, add 3 to it, and then store the arfhitecture back to the same memory location.

HCS12 ARCHITECTURE Razvan Bogdan Embedded Systems. – ppt download

Goodreads is the world’s largest site for readers with over 50 million reviews. Check out the top books of the srchitecture on our page Best Books of We use cookies to give you the best possible experience. My presentations Profile Feedback Log out. The HCS12 uses a bit address bus. Small instruction set maybe 25 or 30 instructions. About project SlidePlayer Terms of Service.


ABA is very simple. Do practice sheet on instructionSummary. Repeat the instruction sequence for the appropriate number of times.

Used only with branch instructions. And each location holds some contents, which is one byte. Chapter 7 Low-Level Programming Languages. Many programs written mainly in a high level language have sections of assembly code. If you wish to download it, please recommend it to your friends in any social system.

The list of these registers is often called the CPU programming model. Review questions are provided at the end of each section to reinforce the main points of the section. Auth with social network: These operands are the data usually numbers to be operated on. Some instructions perform complex operations that might require a dozen or more instructions in a RISC processor. A group of instruction is called a program.

If you wish to download it, please recommend it to your friends in any social system. To add these two numbers, we need hhcs12 put one of them in an accumulator. Do addressingModes practice sheet.