| Specifications | Microsoft Word - RA0073_A_-general version_Graeme Clark_HardwareTechniquesCPUoverhead_final_eng.doc tjeffery01 |
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| Specifications | Microsoft Word - RA0073_A_-general version_Graeme Clark_HardwareTechniquesCPUoverhead_final_eng.doc tjeffery01 |
| Business section |
| Specifications | Microsoft Word - RA0073_A_-general version_Graeme Clark_HardwareTechniquesCPUoverhead_final_eng.doc tjeffery01 |
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| Content | Hardware techniques for removing CPU overhead in Microcontroller applications. By Graeme Clark, product marketing manager, Renesas Technology Europe One of the biggest challenges facing developers today is to find ways to increase real time system performance without impacting clock speed (due to EMC constraints), software complexity and, of course, cost. For developers of microcontroller applications this has not been such a big issue to date. However, it’s starting to become more and more of an issue even for the developers of traditional 8 & 16 bit microcontroller applications. This requirement is being driven by a number of conflicting requirements: • The increasing trend towards using operating systems or schedulers in applications using 8-bit microcontrollers. This adds greatly to the system overhead in handling real time events. • The addition of more and more functions onto what used to be simple applications, especially in the areas of user interface and communications, resulted in less processor time being available for the real time tasks. • The requirement to simplify testing and hence increase the reliability of a system. With this in mind, a lot of research is being conducted to find solutions to these problems, even looking at the fundamental ways that microcontrollers handle real time events, and whether these can be improved. One possible solution is to reinvent the basic real time structure of a microcontroller, and try and move more of the fundamental real time response issues, from software where they currently reside, to a more hardware based |
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