CHIP INTERNAL SIGNAL LINE DETECTING DEVICE OF SEMICONDUCTOR MEMORY DEVICE

摘要

PURPOSE: A chip internal signal line detecting device is provided to check an internal signal line state by using a chip outer pin connected with an internal pad. CONSTITUTION: A chip internal signal line detecting device comprises a pad(10) connected to a chip out pin, a buffer(40) buffering a signal supplied from the pad(10), a source(20) for supplying current source, an input step connected with a mode setting register signal(MRS) and a random chip internal signal line(LINE) for measurement, and a detecting part(30) switching so as to form a current path between the pad(10) and the source(20) according to the state of the mode setting register signal(MRS) and the chip internal signal line(LINE) supplied from the input step, thereby checking the chip internal signal line state through an outer pin connected with the pad(10).