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GXM データシート(PDF) 115 Page - National Semiconductor (TI) |
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GXM データシート(HTML) 115 Page - National Semiconductor (TI) |
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115 / 244 page ![]() Revision 3.1 115 www.national.com Integrated Functions (Continued) 4.3.6 Memory Cycles Figures 4-5 through Figure 4-8 on page 117 illustrate vari- ous memory cycles that the memory controller supports. The following subsections describe some of the sup- ported cycles. SDRAM Read Cycle Figure 4-5shows aSDRAMreadcycle.The figure assumes that a previous ACT command has presented the row address for the read operation. Note that the burst length for the READ command is always two. Figure 4-5. Basic Read Cycle with a CAS Latency of Two SDCLK CS# RAS# CAS# WE# DQM MD MA COL n nn+1 |
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