Integrated circuit

摘要

An integrated circuit includes a plurality of semiconductor devices. Each of the semiconductor devices includes an internal voltage generation unit configured to generate a plurality of internal voltages, a voltage select output unit configured to output a default voltage of a plurality of internal voltages to a preset pad in response to an initial value of a select code, and selectively output the other voltages of the plurality of internal voltages to the pad in response to variations of the select code, and a stack operation control unit configured to control the voltage select output unit to output the default voltage to the pad in response to a stack signal and a predetermined value of the select code, instead of the initial value of the select code, and whether or not to activate the stack signal is determined according to whether or not the plurality of semiconductor devices are stacked.

主权项

1. An integrated circuit comprising a plurality of semiconductor devices,
wherein each of the semiconductor devices comprises: an internal voltage generation unit configured to generate a plurality of internal voltages; a voltage select output unit configured to output a default voltage of the plurality of internal voltages to a pad based on an initial value of a select code; and a stack operation control unit configured to control the voltage select output unit to output the default voltage to the pad in response to a stack signal and a predetermined value of the select code, instead of an initial value of the select code, wherein a level of the stack signal is in a first state when the plurality of semiconductor devices are arranged in a stacked configuration, and the level of the stack signal is in a second state when the plurality of semiconductor devices are not arranged in a stacked configuration.