Transcription of Hardware and Layout Design Considerations for DDR …
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Hardware and Layout Design Considerations for DDR …
Freescale SemiconductorApplication Note Freescale Semiconductor, Inc., 2003, 2007. All rights reserved. Embedded systems that use double data rate memory (DDR) can realize increased performance over traditional single data rate (SDR) memories. As the name implies, DDR enables two data transactions to occur within a single clock cycle without doubling the applied clock or without to doubling the size of the data bus. This increased data bus performance is due to source-synchronous data strobes that permit data to be captured on both the falling and rising edges of the DDR can bring improved performance to an embedded Design , care must be observed in the schematic and Layout phases to ensure that desired performance is realized.
Hardware and Layout Design Considerations for DDR Memory Interfaces, Rev. 6 6 Freescale Semiconductor Layout Order for the DDR Signal Groups Each ground or power reference must be solid and continuous from the BGA ball through the end
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