Method and apparatus for configuring an I/O buffer having an initialized default signaling level to operate at a sampled external circuit signaling level

摘要

A method for automatically detecting signal levels for buffer configuration. The method of one embodiment first samples a first signal. The first signal is compared with a second signal to determine whether the first signal has a higher voltage potential than the second signal. The result of the comparison is latched. The result of the comparison is used to program buffer characteristics.