Alternate ways to interface with serial flash devices to offload the CPU and how to improve the overall system efficiency.
Technology advancement and increasing data transfer rate, have made serial flash memories widely popular to store data on off-chip locations. Traditionally, flash memory devices use a primary controller to interface with the CPU and get the data from the memory device. For large amounts of data, the communication with the CPU is mostly performed by the external Direct Memory Access (DMA) controller which moves data from device to internal memory or vice versa (Figure 1). This method could be very time consuming and complex requiring the CPU to intervene later. This white paper proposes alternate methods to interface with serial flash devices to offload the CPU and how to improve the overall system efficiency.
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