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30141-23 参数 Datasheet PDF下载

30141-23图片预览
型号: 30141-23
PDF下载: 下载PDF文件 查看货源
内容描述: 的Geode ™ GXM处理器与MMX支持集成的x86解决方案 [Geode⑩ GXm Processor Integrated x86 Solution with MMX Support]
分类和应用: 微控制器和处理器外围集成电路微处理器
文件页数/大小: 244 页 / 4221 K
品牌: NSC [ National Semiconductor ]
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Integrated Functions (Continued)  
4.3.6 Memory Cycles  
SDRAM Read Cycle  
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.  
Figure 4-5 shows a SDRAM read cycle. 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.  
SDCLK  
CS#  
RAS#  
CAS#  
WE#  
MA  
DQM  
MD  
COL n  
n
n+1  
Figure 4-5. Basic Read Cycle with a CAS Latency of Two  
Revision 3.1  
115  
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