A photonics integrated circuit for processing radiation includes a first-dimensional grating coupler for coupling in radiation, a second two-dimensional grating coupler for coupling out radiation and a waveguide structure having two distinct waveguide arms for splitting radiation received from the first grating coupler and recombining radiation in the second grating coupler. There is then formed over the substrate a first magnetoresistive layer having formed contacting the first magnetoresistive layer a magnetically biased first magnetic bias layer biased in a first magnetic bias direction with a first magnetic bias field strength. The automatically set CAS latency value is then used to generate the internal clock signal from the external clock signal.