A new cultivar of Helleborus named \u2018Walhero\u2019 that is characterized by vigorous growth, early and prolific flowering with saucer-shaped mid to dark pink flowers and medium-green foliage. At least one of the first and second magnetic cores includes a recessed portion extending in the axial direction so as to form a through-hole when the first and second magnetic cores are combined, and the rod is inserted through the hole. During a burst access cycle the address is incremented internal to the device with additional address strobe transitions.