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STM32F439VG 数据表(PDF) 156 Page - STMicroelectronics |
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STM32F439VG 数据表(HTML) 156 Page - STMicroelectronics |
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156 / 240 page  Electrical characteristics STM32F437xx and STM32F439xx 156/240 DocID024244 Rev 10 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. 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 8 10.5 12 1.71 V < VDD < 3.6 V 8 10.5 14 td(TXD) Transmit data valid delay time 2.7 V < VDD < 3.6 V 8 11 12.5 1.71 V < VDD < 3.6 V 8 11 14.5 1. Guaranteed by characterization results. |
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