Integrated circuit and method of operating the same

Abstract

An integrated circuit includes a first power rail configured to supply a first supply voltage, a second power rail configured to supply a second supply voltage, a first memory circuit coupled to the first and second power rail, and configured to receive a first control signal, the first or second supply voltage, and a first core circuit. The second supply voltage has a first value or a second value different from the first value. The first memory circuit includes a first header circuit coupled to the second power rail, and configured to supply the second supply voltage to a first node in response to the first control signal, and a first memory cell array coupled to the first header circuit by the first node, and configured to store a first set of data, and to receive the second supply voltage from the first header circuit.