This module is a brief overview of ARM architectures from Texas Instruments, including a guide on how to select the ARM architecture that is right for your application and a deep dive into the Stellaris® ARM Cortex-M architecture.
ARM embedded processors – selecting the right one
ARM embedded processors are ubiquitous. With the vast number of ARM-based processors available, selecting the right one for a senior project can seem daunting. This chapter will help you select the right TI ARM processor.
At a high level, ARM embedded processors can be split into three tiers of performance: the Cortex-A, -R and –M series.
Are ready and willing to develop high-complexity software for your application, including running, debugging and compiling high-level operating systems like Windows, Linux or Android.
Are using the microprocessor to program a user interface larger than 7 inches, or wish to display any kind of streaming video on any size display.
You wish to program a field bus protocol.
If you are interested in working with a Cortex-A device from TI, see the BeagleBone website at
http://beagleboard.org/bone/ .
Are interested in the lowest-complexity solution for your application.
Can meet the needs of your application with 150 MHz or less and without a multithreaded OS running in the system.
Are looking for the smallest, least-expensive or lowest-power ARM device.
If you are interested in working with a Cortex-M device from TI, visit the Stellaris® LaunchPad™ development tool website at
http://www.ti.com/stellaris-launchpad .
TI's ARM-based platforms (as of August 2012) are outlined in Figure 1.
Stellaris microcontrollers. Offering performance up to 80 MHz and a high degree of connectivity and analog integration to the microcontroller markets, Stellaris MCUs are ideal for applications that require memory, analog components and communications interfaces to be on a single chip within a compact package.
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Source:
OpenStax, Senior project guide to texas instruments components. OpenStax CNX. Feb 12, 2013 Download for free at http://cnx.org/content/col11449/1.3
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