| 摘要 |
A memory module is configured to include a first rank installed with a first memory chip and a second rank installed with a second memory chip. When the first and second memory chips are in a first data output mode, the first memory chip is configured to externally output lower order data of a plurality of data via lower data output pins. Also, when the first and second memory chips are in the first data output mode, the second memory chip is configured to externally output data that has the same order as the lower order data output by the first memory chip via upper data output pins.
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