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STM32F427NET6TR 数据表(PDF) 152 Page - STMicroelectronics |
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STM32F427NET6TR 数据表(HTML) 152 Page - STMicroelectronics |
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152 / 231 page ![]() Electrical characteristics STM32F427xx STM32F429xx 152/231 DocID024030 Rev 6 Table 72 gives the list of Ethernet MAC signals for the RMII and Figure 48 shows the corresponding timing diagram. Figure 48. Ethernet RMII timing diagram Table 73 gives the list of Ethernet MAC signals for MII and Figure 48 shows the corresponding timing diagram. Figure 49. Ethernet MII timing diagram 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 Table 72. Dynamics characteristics: Ethernet MAC signals for RMII(1) Symbol Parameter Condition Min Typ Max Unit tsu(RXD) Receive data setup time 1.71 V < VDD < 3.6 V 1.5 - - ns tih(RXD) Receive data hold time 0 - - tsu(CRS) Carrier sense setup time 1 - - tih(CRS) Carrier sense hold time 1 - - td(TXEN) Transmit enable valid delay time 2.7 V < VDD < 3.6 V 0 10.5 12 1.71 V < VDD < 3.6 V 10.5 14 td(TXD) Transmit data valid delay time 2.7 V < VDD < 3.6 V 0 11 12.5 1. Guaranteed by characterization results. MII_RX_CLK MII_RXD[3:0] MII_RX_DV MII_RX_ER td(TXEN) td(TXD) tsu(RXD) tsu(ER) tsu(DV) tih(RXD) tih(ER) tih(DV) ai15668 MII_TX_CLK MII_TX_EN MII_TXD[3:0] |
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