| 摘要 |
A semiconductor memory device includes: a global I/O line pair having a global I/O line and a complementary global I/O line; a data I/O buffer unit, coupled to the global I/O line pair; a plurality of banks, coupled to the global I/O line pair, for storing data, said banks including: a first bank coupled to the global I/O line pair; and a second bank coupled to the global I/O line pair, wherein the second bank is located closer to the data I/O buffer unit than the first bank is; a control signal generating unit for generating a control signal, said control signal has a first level and a second level in a read operation and a write operation, respectively; a first precharge unit located closely to said first bank, said first precharge unit sensing a level transition of the global I/O line pair and precharging the global I/O line pair in response to the control signal of the second level in a write operation; and a second precharge unit located closely to said second bank, said second precharge unit sensing a level transition of the global I/O line pair and precharging the global I/O line pair in response to an inverted signal of the control signal in the read operation.
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