Semiconductor memory apparatus and method of controlling external voltage using the same

摘要

A semiconductor memory apparatus according to the embodiment includes: an external connection terminal configured to supply an external voltage; a fuse unit configured to perform a fuse rupture operation; and an interruption circuit unit configured to respond to a test signal to determine whether the external connection terminal is connected to the fuse unit.

主权项

1. A semiconductor memory apparatus, comprising:
an external connection terminal configured to supply an external voltage; a fuse unit configured to perform a fuse rupture operation; and an interruption circuit unit configured—to—respond to a test signal to determine whether the external connection terminal is connected to the fuse unit, wherein the interruption circuit unit includes: a voltage pump unit configured to pump an internal voltage to generate a pumping voltage; a control unit configured to be applied with the pumping voltage and respond to the test signal to output the pumping voltage or the internal voltage; and a switch unit configured to respond to the pumping voltage or the internal voltage to determine whether the external connection terminal is connected to the fuse unit.