A sensing device includes a sensor, a control unit, an input/output (I/O)
interface, and a non-volatile magnetic memory device having one or more
memory cells, each of the memory cells, wherein each memory cell of the
non-volatile magnetic memory device includes a magnetic switch including
a magnetic component and a write coil located proximate the magnetic
component, the write coil coupled to receive a current sufficient to
create a remnant magnetic polarity in the magnetic component, and a Hall
sensor, positioned proximate the magnetic component, to detect the
remnant magnetic polarity indicative of a stored data bit.