SEMICONDUCTOR MEMORY SYSTEM

摘要

PURPOSE: A semiconductor memory system is provided to improve the reliability of the semiconductor memory system by performing tests of each component and a connection state. CONSTITUTION: Multiple semiconductor memories are laminated in a data storage unit. An interposer connects a logic die (40-1) and a controller. The controller is arranged on the interposer and controls the data storage unit. The logic die is connected to the data storage unit. The logic die generates a test pattern, outputs the test pattern to the data storage unit according to a test mode or to the controller through the interposer, receives a return pattern signal outputted from the data storage unit or the controller, and compares the test pattern and the return pattern signal. [Reference numerals] (41) Test patter generator; (42) Output selector; (43) Input selector; (44,45) Receiver for memory; (46) Transmitter for controller; (47) Receiver for controller; (48) Comparator