https://devzone.nordicsemi.com/f/nordic-q-a/40025/spi-master-transaction-sdk-v10-0Hi everyone, I used SPI interface to access a external flash with page size 256 bytes. I found I can&#39;t access full page, because the maximum of one SPI transaction is 255 bytes. I need 260 bytes (include command and data) in one SPI transactionen-USTelligent Community 13Wed, 31 Oct 2018 10:35:01 GMThttps://devzone.nordicsemi.com/thread/155291?ContentTypeID=1Wed, 31 Oct 2018 10:35:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2c01d8b0-ddae-4232-b340-4320817bc94aJ&#248;rgen Holmefjord<p>Hi,</p> <p>Unfortunately the SPI driver is limited to a length parameter of size uint8_t. This limit comes from the MAXCNT register size of 8 bit on SPIM peripheral (with EasyDMA support) on nRF52832.</p> <p>If using legacy SPI peripheral on nRF51822, you should be able to extend the length parameters to 16 bit.</p> <p>I have attached modified drivers that you can try. Note that there is not guards preventing it from being used with SPIM peripheral, so please use with care.</p> <p><a href="https://devzone.nordicsemi.com/cfs-file/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-1533326a5d054d5991d94340135e2776/nrf_5F00_drv_5F00_spi.c">devzone.nordicsemi.com/.../nrf_5F00_drv_5F00_spi.c</a></p> <p><a href="https://devzone.nordicsemi.com/cfs-file/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-1533326a5d054d5991d94340135e2776/nrf_5F00_drv_5F00_spi.h">devzone.nordicsemi.com/.../nrf_5F00_drv_5F00_spi.h</a></p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>