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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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DP83902AVF 数据表(PDF) 54 Page - National Semiconductor (TI) |
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DP83902AVF 数据表(HTML) 54 Page - National Semiconductor (TI) |
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54 / 70 page  150 Switching Characteristics AC Specs DP83902A Note All Timing is Preliminary (Continued) Register Write (Latched Using ADS0) TLF11157 – 35 Symbol Parameter Min Max Units rss Register Select Setup to ADS0 Low 10 ns rsh Register Select Hold from ADS0 Low 17 ns aswi Address Strobe Width In 15 ns rwds Register Write Data Setup 20 ns rwdh Register Write Data Hold 21 ns ww Write Strobe Width from ACK 50 ns wackh Write Strobe High to ACK High 30 ns wackl Write Low to ACK Low (Notes 1 2) n bcyc a 30 ns rswsl Register Select to Write Strobe Low 10 ns Note 1 ACK is not generated until CS and SWR are low and the ST-NIC has synchronized to the register access In Dual Bus Systems additional cycles will be used for a local DMA or Remote DMA to complete Note 2 CS may be asserted before or after SWR IfCS is asserted after SWR wackl is referenced from falling edge of CS 54 |
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