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STM32F217VG 数据表(PDF) 112 Page - STMicroelectronics |
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STM32F217VG 数据表(HTML) 112 Page - STMicroelectronics |
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112 / 173 page  Electrical characteristics STM32F21xxx 112/173 Doc ID 17050 Rev 8 Figure 45. Ethernet SMI timing diagram Table 61 gives the list of Ethernet MAC signals for the RMII and Figure 46 shows the corresponding timing diagram. Figure 46. Ethernet RMII timing diagram Table 60. 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 61. 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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