A mobile device including a system-on-chip, which includes a mobile device control module to execute application programs for the mobile device, a solid-state disk (SSD) control module to control SSD operations, a random access memory (RAM) control module to store both SSD-related data and mobile device-related data in a single RAM, and a nonvolatile (NV) memory control module to control reading from and writing to the NV memory array. Data in the single RAM is stored into the NV memory array during an idle mode. The single RAM is powered down during the idle mode after the data in the single RAM has been stored into the NV memory array. The stored data in the NV memory array is loaded into the single RAM during a re-start mode.