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STM32F479AI 数据表(PDF) 153 Page - STMicroelectronics |
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STM32F479AI 数据表(HTML) 153 Page - STMicroelectronics |
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153 / 217 page  DocID028010 Rev 3 153/217 STM32F479xx Electrical characteristics 190 Table 74 gives the list of Ethernet MAC signals for the RMII and Figure 52 shows the corresponding timing diagram. Figure 52. Ethernet RMII timing diagram Table 73. Dynamics characteristics: Ethernet MAC signals for SMI(1) 1. Guaranteed based on test during characterization. Symbol Parameter Min Typ Max Unit tMDC MDC cycle time(2.38 MHz) 400 400 403 ns Td(MDIO) Write data valid time THCLK - 1 THCLK THCLK + 1.5 tsu(MDIO) Read data setup time 12.5 - - th(MDIO) Read data hold time 0 - - RMII_REF_CLK RMII_TX_EN RMII_TXD[1:0] RMII_RXD[1:0] RMII_CRS_DV td(TXEN) td(TXD) tsu(RXD) tsu(CRS) tih(RXD) tih(CRS) ai15667 |
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