Embodiments of the present invention relate to configurable inputs andor outputs for memory and memory stacking applications. In the method, a targeting construct comprises, for example, a first recombination site and a polynucleotide sequence of interest, and a site-specific recombinase, which are introduced into the cell. For HARQ-ACK timing, in cases where a reference UL-DL configuration applied to the second cell is #0, the DAI field is not used in a process of transmitting the HARQ-ACK information.