A personal sensing device that may be used for storing personal data and sensed data arbitrates and prioritizes competing requests for memory access from sensing, wireless, and wired interfaces. The personal sensing device enables power efficiency with burst-writes to the memory at higher data rates then an incoming sensor data stream without risk of data loss. Sensing operations coordinated by reconfigurable control logic are partitioned from storage operations coordinated by a multi-port memory controller. The interface between the functional partitioning uses message passing, status/control registers and buffering to reduce or eliminate system interdependencies.