High speed boundary scan multiplexer

摘要

An input cell for a semiconductor chip having an I/O region proximate the edge of the chip and a core region located inside the I/O region. The input cell is located in the I/O region and includes an input pad for receiving an input signal and a multiplexer. The multiplexer receives an input signal from the pad or a boundary scan signal from the core region and selectively provides one signal or the other to the core region.