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LAN9500AI 数据表(PDF) 58 Page - SMSC Corporation |
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LAN9500AI 数据表(HTML) 58 Page - SMSC Corporation |
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58 / 66 page  USB 2.0 to 10/100 Ethernet Controller Datasheet Revision 1.1 (04-18-13) 58 SMSC LAN950x Family DATASHEET 8.5.5 MII Interface Timing This section specifies the MII interface transmit and receive timing. Note 8.14 Timing was designed for system load between 10 pf and 25 pf. Figure 8.5 MII Transmit Timing Table 8.18 MII Transmit Timing Values SYMBOL DESCRIPTION MIN MAX UNITS NOTES tclkp TXCLK period 40 ns tclkh TXCLK high time tclkp*0.4 tclkp*0.6 ns tclkl TXCLK low time tclkp*0.4 tclkp*0.6 ns tval TXD[3:0], TXEN output valid from rising edge of TXCLK 22.0 ns Note 8.14 thold TXD[3:0], TXEN output hold from rising edge of TXCLK 0ns Note 8.14 TXCLK TXD[3:0] TXEN tclkh tclkl tclkp tval thold tval tval thold |
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