Motorola MCU MC9S12DP256 Manuel d'utilisateur télécharger pdf

ECE562 – Computer Organization

Last Updated: August 31, 2010

Lab #1 Notes

The Microcontroller

Over the course of the semester you will be learning how to program the Motorola

MC9S12DP256 microcontroller unit (MCU) with assembly language. The

MC9S12DP256 is built around the 16-bit Motorola HCS12 central processing unit (CPU)

and contains a number of peripherals including 256 Kbytes of Flash EEPROM, 4 Kbytes

of EEPROM and 12 Kbytes of RAM. For a full description of the MC9S12DP256, refer

to Section 1 of the “MC9S12DP256 Device User Guide” posted on the course website.

The Development Board

The microcontroller chip isn’t very useful to us unless we have a way to access it. To do

so, we will use the CML12S-DP256 development board produced by Axiom

Manufacturing. The development board serves several purposes. First, the board (and

corresponding software) provides a means to easily place and run code on the

microprocessor. Secondly, the board gives us a way to connect to the microcontroller’s

input and output ports. Thirdly, the development board provides an interface to some of

the more complicated peripherals we will be using such as the keypad and the LCD

display.

The development board needs to be powered on before any code can be sent to the

microcontroller. To do so, simply plug in the wall power adaptor that is connected to the

board. Please be sure to also unplug the board from the wall when you are done using it.

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ECE562 – Computer Organization Last Updated: August 31, 2010 Lab #1 Notes The Microcontroller Over the course of the semester you will be learning h

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The Microprocessor As stated above, the microprocessor (or CPU) contained within the microcontroller is the HCS12. All operations performed by the

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Above is a diagram of the HCS12’s register set. Familiarize yourself with these registers and what each is used for. Read section 2.1 of the “CPU12 R

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While you don’t need to memorize all of the instructions, you should know how to use the manual to find any necessary information. For a handful of i

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References Used by this Document: • Motorola, Inc. “MC9S12DP256B Device User Guide V02.12”. Last Revision Date: August 12, 2002. • Huang, Han-Way.

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Motorola MCU MC9S12DP256 Manuel d'utilisateur