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AM1808 датащи(PDF) 97 Page - Texas Instruments |
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AM1808 датащи(HTML) 97 Page - Texas Instruments |
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97 / 262 page ![]() AM1808 www.ti.com SPRS653C – FEBRUARY 2010 – REVISED DECEMBER 2011 Table 5-17. EMIFA Supported SDRAM Configurations(1) SDRAM EMIFA Data Total Total Memory Memory Number of Bus Size Rows Columns Banks Memory Memory Density Data Bus Memories (bits) (Mbits) (Mbytes) (Mbits) Width (bits) 1 16 16 8 1 256 32 256 1 16 16 8 2 512 64 512 1 16 16 8 4 1024 128 1024 1 16 16 9 1 512 64 512 1 16 16 9 2 1024 128 1024 16 1 16 16 9 4 2048 256 2048 1 16 16 10 1 1024 128 1024 1 16 16 10 2 2048 256 2048 1 16 16 10 4 4096 512 4096 1 16 16 11 1 2048 256 2048 1 16 16 11 2 4096 512 4096 1 16 15 11 4 4096 512 4096 2 16 16 8 1 256 32 128 2 16 16 8 2 512 64 256 2 16 16 8 4 1024 128 512 2 16 16 9 1 512 64 256 2 16 16 9 2 1024 128 512 8 2 16 16 9 4 2048 256 1024 2 16 16 10 1 1024 128 512 2 16 16 10 2 2048 256 1024 2 16 16 10 4 4096 512 2048 2 16 16 11 1 2048 256 1024 2 16 16 11 2 4096 512 2048 2 16 15 11 4 4096 512 2048 (1) The shaded cells indicate configurations that are possible on the EMIFA interface but as of this writing SDRAM memories capable of supporting these densities are not available in the market. 5.10.3 EMIFA SDRAM Loading Limitations EMIFA supports SDRAM up to 100 MHz with up to two SDRAM or asynchronous memory loads. Additional loads will limit the SDRAM operation to lower speeds and the maximum speed should be confirmed by board simulation using IBIS models. Copyright © 2010–2011, Texas Instruments Incorporated Peripheral Information and Electrical Specifications 97 Submit Documentation Feedback Product Folder Link(s): AM1808 |
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