/ { cpuapp_sram@2007ec00 { compatible = "zephyr,memory-region", "mmio-sram"; reg = <0x2007ec00 DT_SIZE_K(4)>; zephyr,memory-region = "RetainedMem"; status = "okay"; retainedmem0: retainedmem { compatible = "zephyr,retained-ram"; status = "okay"; }; }; aliases { retainedmemtestdevice = &retainedmem0; }; }; &cpuapp_sram { /* Shrink SRAM size to avoid overlap with retained memory region: * 511 - 4 = 507KB = 0x7ec00 */ reg = <0x20000000 DT_SIZE_K(507)>; ranges = <0x0 0x20000000 0x7ec00>; };