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25 ноября
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AVR32: начало заката АРМ-ов? А ведь еще и стековые процессоры на подходе... http://www.electronicdesign.com/Articles/Index.cfm?AD=1&ArticleID=11939
Atmel took a turn away from the pack when it designed its 8-bit AVR. Now, the company is bucking the trend toward the 32-bit ARM architecture with its AVR32 processor architecture. Needless to say, ARM and its partners don't have the 32-bit market sewn up by any means. In fact, a range of popular 32-bit microprocessors is available, including three families from Freescale alone. The competition should be healthy. Still, the AVR32 melds system design components like DSP and single-instruction/multiple-data (SIMD) instructions, Java bytecode support, and a compact instruction set. The AVR32 runs in standard and Java bytecode mode. In standard mode, it can execute 16- or 32-bit instructions without switching modes. Most instructions are 16 bits, which reduces code size and effectively increases the cache performance because more instructions can fit into the cache. This is one reason why the ARM Thumb and Thumb2 instruction sets have become so popular. However, the AVR32 doesn't have the mode switch overhead when the need arises for 32-bit instructions.