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LAN7430 Datasheet(PDF) 59 Page - Microchip Technology |
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LAN7430 Datasheet(HTML) 59 Page - Microchip Technology |
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59 / 77 page  2018-2019 Microchip Technology Inc. DS00002631D-page 59 LAN7430/LAN7431 7.6.5 MII TIMING (100BASE-TX, 10BASE-T) (LAN7431 ONLY) This section specifies the LAN7431 MII interface transmit and receive timing. Note 7-16 40ns for 100BASE-TX operation, 400ns for 10BASE-T operation. Note 7-17 Timing was designed for system load between 10 pf and 25 pf. FIGURE 7-6: MII TRANSMIT TIMING TABLE 7-14: MII TRANSMIT TIMING VALUES Symbol Description Min Max Units Notes tclkp TX_CLK period Note 7-16 ns tclkh TX_CLK high time tclkp*0.4 tclkp*0.6 ns tclkl TX_CLK low time tclkp*0.4 tclkp*0.6 ns tval TXD[3:0], TX_EN, TX_ER output valid from ris- ing edge of TX_CLK 22.0 ns Note 7-17 thold TXD[3:0], TX_EN, TX_ER output hold from ris- ing edge of TX_CLK 0 ns Note 7-17 TX_CLK TXD[3:0], TX_ER TX_EN tclkh tclkl tclkp tval thold tval tval thold |
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