https://devzone.nordicsemi.com/f/nordic-q-a/64120/nrf52810-spi-and-dfubuttonlessHi I have some issues with nRF52810. I am trying to use SPI as a Master on a custom board. I saw here that nRF52810 does not support legacy SPI : https://devzone.nordicsemi.com/f/nordic-q-a/36430/legacy-direct-spi-mode-on-nrf52810 . So which variableen-USTelligent Community 13Thu, 06 Aug 2020 11:20:52 GMThttps://devzone.nordicsemi.com/thread/263407?ContentTypeID=1Thu, 06 Aug 2020 11:20:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:41c31bf6-a1ed-40c7-a643-ca59cc76b122Hung Bui<p>Hi Tai,&nbsp;<br />1. If you&nbsp;have&nbsp;SPI0_USE_EASY_DMA = 1 in sdk_config.h then the&nbsp;legacy SPI will <strong>not</strong> be used. Don&#39;t get confused with the &quot;legacy mode&quot;&nbsp; or &quot;legacy layer&quot; they meant the legacy nrf _drv software library we had in the SDK, not the legacy SPI.&nbsp;</p> <p>2. I assume you are asking about buttonless DFU with BLE OTA&nbsp; ? Then the answer is yes, you can configure the nRF52810 with buttonless service. The buttonless service is simply the software to jump from application to bootloader and enter DFU mode. I got some explanation <a href="https://devzone.nordicsemi.com/nordic/short-range-guides/b/software-development-kit/posts/getting-started-with-nordics-secure-dfu-bootloader#h75sjziavjbukzaywg6xlx19np0fm4">here</a>.&nbsp;</p> <p>3. It depends on how large your application is. The NRF52810 has only 192kB of flash. If you have the bootloader this would leave you maybe 60kB for application. The obvious limitation here is that you can&#39;t do softdevice DFU update.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/262130?ContentTypeID=1Wed, 29 Jul 2020 08:43:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:367b57ea-7a21-4bcf-a7b4-9dce0fa90a82Tai<p>no idea?</p><div style="clear:both;"></div>