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STM32F217VG 数据表(PDF) 119 Page - STMicroelectronics |
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STM32F217VG 数据表(HTML) 119 Page - STMicroelectronics |
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119 / 175 page  DocID17050 Rev 9 119/175 STM32F21xxx Electrical characteristics 174 Figure 46. Ethernet SMI timing diagram Table 63 gives the list of Ethernet MAC signals for the RMII and Figure 47 shows the corresponding timing diagram. Figure 47. Ethernet RMII timing diagram Table 62. Dynamics characteristics: Ethernet MAC signals for SMI Symbol Rating Min Typ Max Unit tMDC MDC cycle time (2.38 MHz) 411 420 425 ns td(MDIO) MDIO write data valid time 6 10 13 ns tsu(MDIO) Read data setup time 12 - - ns th(MDIO) Read data hold time 0 - - ns Table 63. Dynamics characteristics: Ethernet MAC signals for RMII Symbol Rating Min Typ Max Unit tsu(RXD) Receive data setup time 1 - - ns tih(RXD) Receive data hold time 1.5 - - tsu(CRS) Carrier sense set-up time 0 - - tih(CRS) Carrier sense hold time 2 - - td(TXEN) Transmit enable valid delay time 9 11 13 td(TXD) Transmit data valid delay time 9 11.5 14 ETH_MDC ETH_MDIO(O) ETH_MDIO(I) tMDC td(MDIO) tsu(MDIO) th(MDIO) ai15666d 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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