AN-B-023 DA14580 Interfacing with External Memory
■This Application Note describes how to use an external memory (I2C EEPROM or SPI Flash) with the DA14580.The main differences between the internal OTP and an external memory are also presented.
●Introduction
■The DA14580 includes user memory of 32kB of OTP (One Time programmable), 42kB of SRAM and additional blocks of retention RAM. The flexibility of the device allows the DA14580 to also use external SPI/I2C FLASH or EEPROMin a variety of different use cases. This includes booting from external memory, using external memory to store critical data parameters, provide flexibility for the DA14580 to support complete Over the Air image update, or booting from memory within an external MCU (externally hosted application). OTP memory gives optimum performance in terms of low power and cost , and coupled with the ability to use external FLASH or EEPROM, the DA14580 can support the most basic of configurations highly optimised for system cost right through to more feature rich configurations requiring image updates or multiple images.Please refer to [1] and [4], for the booting sequence of DA14580from an external SPI or I2C memory.The following table sums up the pros and cons of using the internal OTP or an external memory (SPI or I2C).
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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22-Jan-2022 |
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Revision 2.2 |
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AN-B-023 |
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1.3 MB |
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