A system includes a first integrated circuit configured to operate in at least a normal mode and a test mode and a second integrated circuit, where both the first integrated circuit and the second integrated circuit are disposed within a same semiconductor device package. The system further includes a first terminal, external to the semiconductor device package, electronically coupled to the first integrated circuit and the second integrated circuit. The first terminal is electronically coupled to a buffer in the second integrated circuit and used to convey signals to or from the first integrated circuit.