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Using DMA for Data Transfers without CPU Intervention Can Reduce Power and Extend System Battery Life

From Silicon Labs

The implementation of direct memory access (DMA) in 32-bit microcontrollers (MCUs) based on ARM® cores has limitations. Specifically, DMA does not support chaining (connecting a string of peripherals using DMA) or sequencing (executing specific steps in the chain of peripherals multiple times), and it requires CPU intervention

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