Methods, apparatuses, and computer-readable media for scanning a keyboard are disclosed. Actuation of each of the keys electrically couples one of a plurality of first lines and one of a plurality of second lines. A first signal is applied to a plurality of first lines. A second signal is applied to a plurality of second lines. Upon identifying at least one of the second lines as presenting a signal different from the second signal, a scan signal is applied to the identified second line. At least one first line is identified as presenting a signal indicating the at least one first line is contact with the identified second line applying the scan signal. At least one of the keys is identified as causing the identified second line and the least one identified first line to be coupled.