Patent ID: 7436719

Claim:
An auto-precharge signal generating circuit comprising: a first input signal generator configured to generate a first input signal in response to a first bank enable signal and an auto-precharge flag signal, said first bank enable signal being enabled in accordance with a read or write command for a first bank and said auto-precharge flag signal being enabled for auto-precharging of the first bank; a second input signal generator configured to receive an enable control signal, a plurality of second bank enable signals, and a test mode signal, and generate a second input signal based on the received signals said enable control signal being enabled after completion of the read or write operation for the first bank, said plurality of second bank enable signals being enabled in response to read commands for a plurality of second banks, respectively, and said test mode signal being enabled for a read with auto-precharge (RDA) operation or a write with auto-precharge (WRA) operation in the first and second banks; and an auto-precharge signal output stage configured to receive a buffered signal obtained after buffering of the first input signal, together with the second input signal, generate an auto-precharge signal for auto-precharge of the first bank, and output the auto-precharge signal, wherein the second input signal is enabled when the enable control signal is enabled under the condition in which the test mode signal is enabled.