Patent ID: 6448849
Filing Date: 2002-09-10
Classification: G11C,H01L

Abstract:
A module comprising:a substrate; a first semiconductor device mounted on a front surface of said substrate and including a first semiconductor chip and a first package encapsulating said first semiconductor chip, said first semiconductor chip including: a first ground terminal; a first power terminal; first and second signal terminals; a first control terminal; first and second internal signal wirings; and a first switch circuit connecting said first signal terminal to said first internal signal wiring and said second signal terminal to said second internal signal wiring when said first control terminal is at a first logic level, and connecting said first signal terminal to said second internal signal wiring and said second signal terminal to said first internal signal wiring when said first control terminal is at a second logic level, said first package including: a second power terminal; a second ground terminal; first and second package terminals; a first line connecting said first and second power terminals to each other; a second line connecting said first and second ground terminals to each other; a third line connecting said first signal terminal to said first package terminal; a fourth line connecting said second signal terminal to said second package terminal; and a fifth line connecting said first control terminal to said second power terminal to supply said first logic to said first control terminal so that said first and second signal terminals are connected respectively to said first and second internal signal wirings via said first switch circuit; and a second semiconductor device mounted on a rear surface of said substrate and including a second semiconductor chip and a second package encapsulating said second semiconductor chip, said second semiconductor chip including: a third ground terminal a third power terminal; third and fourth signal terminals; a second control terminal; third and fourth internal signal wirings; and a second switch circuit connecting said third signal terminal to said third internal signal wiring and said fourth signal terminal to said fourth internal signal wiring when said second control terminal is at said first logic level, and connecting said third signal terminal to said fourth internal signal wiring and said fourth signal terminal to said third internal signal wiring when said second control terminal is at said second logic level, said second package including: a fourth power terminal; a fourth ground terminal; third and fourth package terminals; a sixth line connecting said third and fourth power terminals to each other; a seventh line connecting said third and fourth ground terminals to each other; an eighth line connecting said third signal terminal to said third package terminal; a ninth line connecting said fourth signal terminal to said fourth package terminal; and a tenth line connecting said second control terminal to said fourth ground terminal to supply said second logic to said second control terminal so that said third and fourth signal terminals are connected respectively to said fourth and third internal signal wirings via said second switch circuit.