Patent ID: 7679981

Claim:
A semiconductor device comprising: a first logic unit for performing a logic operation with respect to a plurality of first control signals, each of the first control signals indicating whether a corresponding one of a plurality of banks of the semiconductor device is in an active state; a controller for receiving an auto-refresh signal, a self-refresh signal and an output signal from the first logic unit, and outputting a second control signal having information about activation of the semiconductor device in response to the auto-refresh signal and the self-refresh signal; wherein the second control signal is enabled when all banks are in the standby state, the second control signal is disabled when at least one of the banks is in the active state, the second control signal is enabled when at least one of the banks performs the self-refresh operation or the auto-refresh operation even though it is in the active state, the semiconductor device thereby prevented from entering a command wait state under control of the second control signal.