Various semiconductor chips and chip stack arrangements are disclosed. In one aspect, a semiconductor chip stack is provided that includes a first semiconductor chip and a second semiconductor chip stacked on the first semiconductor chip. The first semiconductor chip includes a first logic layer and a first semiconductor layer on the first logic layer. The first semiconductor layer has plural first through-silicon transistors operable to selectively control the transmission of data from the first semiconductor chip to the second semiconductor chip and has plural first through-silicon vias to convey control signals to the second semiconductor chip.