Importance

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Abstract

Disclosed is a data interface device for accessing an SDRAM (Synchronous Dynamic Random Access Memory). A clock and selective data capturing are used to improve an operating rate of an SDRAM interface and to match data at SDRAM data input and output times. A clock used for driving the SDRAM uses a feedback clock for synchronization in an SDRAM controller as well as the SDRAM as a clock used to drive the SDRAM. The selective data capturing uses a register part for storing data inputted into the SDRAM. The register part for storing the data is configured by double registers that are operated in an alternative manner according to a correlation between the inputted data and the feedback clock.

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First Claim