https://devzone.nordicsemi.com/f/nordic-q-a/1198/what-is-the-difference-of-two-sramnrf24le1 memory map shows that there are two sram block size of 512byte ,the first one is data retentive (address 0-0x0200) ,another one is data non retentive (address 0x0200 --0x0400). i want to know if both of them will lost data if power off.? whaten-USTelligent Community 13Mon, 30 Dec 2013 16:29:52 GMThttps://devzone.nordicsemi.com/thread/5572?ContentTypeID=1Mon, 30 Dec 2013 16:29:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:661344bb-1a9d-4479-8264-f1a82bfd65d5Hung Bui<p>Hi Terry,</p> <p>Depend on the sleep mode you set, the data retentive SRAM (0-0x0200) will be retrieved or not. You can have a look at section 11.2 Modes of operation in the nRF24LE1 Product Spec for detailed information.</p><div style="clear:both;"></div>