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  • Case ID: 318469
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500MB Data Storage without SD Card

bilal7317x

I want to save 300 - 500 MB (Mega Byte) data on a device using nrf52832 but unfortunately I can not use removable device like SD card. I am also aware that nrf do not provide support for eMMC or NAND flash. NOR flash can not save that much data and even even if it can do, the hardware is not available at stores. Kindly guide me in this regard. 

Thanks

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    NAND Flash is just a simple SPI with DMA interface == SPIM, try an 8-pin 4GBit == 512MByte chip, lots available eg MT29F4G01ABBFDWB-IT-F or W25X40CLSNIG. Use in SPI or QSPI mode;  I use Micron parts on the nRF52832.

    Bad bits? Yes there are some but not many and most parts have these mapped out on receipt; manage as required unlike the SD card interface which does that for you. Bits can go bad in later usage, usually a read after write or software error correction handles that. Many applications eg medical device are write-once read back at depot; if a sector is bad after a write just write the same data in the next sector (example).

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    NAND Flash is just a simple SPI with DMA interface == SPIM, try an 8-pin 4GBit == 512MByte chip, lots available eg MT29F4G01ABBFDWB-IT-F or W25X40CLSNIG. Use in SPI or QSPI mode;  I use Micron parts on the nRF52832.

    Bad bits? Yes there are some but not many and most parts have these mapped out on receipt; manage as required unlike the SD card interface which does that for you. Bits can go bad in later usage, usually a read after write or software error correction handles that. Many applications eg medical device are write-once read back at depot; if a sector is bad after a write just write the same data in the next sector (example).

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