| 摘要 |
An auto precharge control signal generating circuit includes an output enable circuit that is reset in response to a precharge operation and generates an output enable signal by latching an auto precharge command signal. A delay circuit also is provided which generates a 1 clock delay signal by delaying an active period of a column bank address signal by 1 clock, and generates a 1 clock delay signal having an active period including a non-active period sufficiently between a previous column bank address signal and a present column bank address signal in case that the burst length is 1. A combining circuit generates an auto precharge control signal by combining the column bank address signal and the 1 clock delay signal in response to the output enable signal, in order to perform the auto precharge operation after delaying 2 clock from the last data input in response to a continued auto precharge burst write command. Therefore, when the burst length is 1 in case that the time from the last data input to the auto precharge is 2 clock cycles in burst write, the present invention prevents the generation of unnecessary auto precharge control signal resulting from the crossing of the 1 clock delay signal and the column bank address signal in the middle of continuous burst write operation.
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