Patent ID: 6417692
Filing Date: 2002-07-09
Classification: H03K

Abstract:
An input/output cell comprising:an input/output pad; input receiver circuitry comprising a plurality of input receivers coupled in parallel between the input/output pad and an integrated circuit input line having a signaling level, each of the input receivers translating input signals from one signaling level to the signaling level of the integrated circuit; output driver circuitry comprising a plurality of output drivers coupled between the input/output pad and an integrated circuit output line, each of the output drivers translating input signals from one signaling level to the signaling level of the integrated circuit; and a plurality of control elements coupled to the input receiver circuitry and the output driver circuitry, each control element being able to receive at least one control signal specific to that control element, the control elements operating based on the at least one control signal to select one driver from the plurality of output drivers and to select one receiver from the plurality of input receivers.