Patent ID: 8289041
Filing Date: 2012-10-16
Classification: G11C,H01L

Abstract:
1. A semiconductor integrated circuit device, comprising: a first chip including an internal circuit; a second chip capable of being accessed only via the first chip; a test processor circuit which accesses the second chip from an external terminal and tests the second chip, the test processor circuit being electrically connected to the internal circuit within the first chip; a test circuit formed inside the test processor circuit, including an input/output buffer for signals for accessing the second chip; a bypass line formed within the test processor circuit for transferring signals from the first chip to the second chip while bypassing the input/output buffer; and a switch which switches between a signal transfer path via the input/output buffer, and a signal transfer path via the bypass line, wherein the bypass line is formed so the different terminals on the first chip are used for accessing the second chip, by way of a signal transfer path via the bypass line and by way of the signal transfer path via the input/output buffer.