Method and apparatus for controlling compensated buffers

摘要

A method and an apparatus for controlling compensated buffer circuits. In one embodiment, a compensation buffer control circuit includes a compensation unit with a compensation signal memory location such as a compensation register. The compensation unit is configured to produce a local compensation control signal to control a compensated buffer circuit. The compensation signal memory location is configured to selectively receive and store and the local compensation control signal generated by the compensation unit. The contents of the compensation signal memory location may be read, which allows for the external reading of the local compensation signal generated by the compensation unit. In addition, an external write of an external compensation control signal may be performed to the compensation signal memory location such that the output of the compensation unit can be overridden. A compensated buffer circuit is coupled to selectively receive either the local compensation control signal or the external compensation control signal.