Transcription of AN5050 Application note - STMicroelectronics
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AN5050 Application note - STMicroelectronics
September 2021AN5050 Rev 71/741AN5050 Application noteOcto-SPI interface on STM32 microcontrollers IntroductionThe growing demand for richer graphics, wider range of multimedia and other data-intensive content, drives embedded designers to enable more sophisticated features in embedded applications. These sophisticated features require higher data throughputs and extra demands on the often limited MCU on-chip parallel memories have been widely used so far to provide higher data throughput and to extend the MCU on-chip memory, solving the memory size and the performance limitation. However, this action compromises the pin count and implies a need of more complex designs and higher meet these requirements, STMicroelectronics offers several MCU products in the market with the new integrated high-throughput Octo-SPI interface (see the table below).
• The CPU, as a master, can access the OCTOSPI and then execute code from the memory, with support of wrap operation, to enable "critical word first" access and hence improve performance in case of cache line refill. • The DMA can do transfers from the OCTOSPI to other internal or external memories.
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