Patent ID: 7133798

Claim:
A method for monitoring signals communicated between a first integrated circuit chip and a second integrated circuit chip within a single packaged semiconductor device, the method comprising: receiving signals from the first integrated circuit chip at a plurality of bond pads on the second integrated circuit chip; selecting a portion of the received signals; outputting from the second integrated chip the selected portion of the signals received from the first integrated circuit chip to outside the single packaged semiconductor device for monitoring of the signals of the first integrated circuit chip; wherein the second integrated circuit chip comprises a plurality of monitor buffers connected in a daisy chain arrangement, each monitor buffer being individually selectable and associated with a respective one of the plurality of bond pads on the second integrated circuit chip; wherein selecting comprises selecting one of the plurality of monitor buffers; and wherein outputting comprises outputting the signal received at the bond pad associated with the selected monitor buffer at the end of the daisy chain arrangement.