Patent ID: 8953394
Filing Date: 2015-02-10
Classification: G11C,H01L

Abstract:
1. A semiconductor device, comprising: a logic chip and a memory chip stacked over the logic chip, the logic chip having a first surface facing the memory chip and a second surface opposite to the first surface and including: first and second internal input/output circuit units for exchanging signals with the memory chip; a first external input/output circuit unit for exchanging signals with the outside through first external input/output pads formed according to an external interface standard of a first memory over the second surface; and a second external input/output circuit unit for exchanging signals with the outside through second external input/output pads formed according to an external interface standard of a second memory over the second surface, wherein the semiconductor device operates in one of a first mode in which the first internal input/output circuit unit and the first external input/output circuit unit are enabled and a second mode in which the first and second internal input/output circuit units and the second external input/output circuit unit are enabled.