Patent ID: 6897554
Filing Date: 2005-05-24
Classification: G01R,H01L

Abstract:
1. A multi-chip package type semiconductor device having a first semiconductor chip, which has a first internal circuit and a plurality of first internal terminal pads for transmitting signals to or from the first internal circuit, and a second semiconductor chip, which has a second internal circuit and a plurality of second internal terminal pads for transmitting signals to or from the second internal circuit for transmitting signals, and each second internal terminal pad being connected to one of the first internal terminal pads electrically, comprising a test circuit, responsive to a voltage level of a test mode signal, selecting one from between operations for prohibiting signal transmission between the first internal circuit and the first internal terminal pads and for allowing signal transmission between the first internal circuit and the first internal terminal pads, and for selecting one from between operations for prohibiting signal transmission between the second internal circuit and the second internal terminal pads and for allowing signal transmission between the second internal circuit and the second internal terminal pads, wherein the second semiconductor chip includes a first data-storing circuit, the first data-storing circuit storing signals as data, which are provided to the second internal terminal pads, responsive to a storing control signal, and outputting the stored data.