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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F427AI датащи(PDF) 155 Page - STMicroelectronics |
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STM32F427AI датащи(HTML) 155 Page - STMicroelectronics |
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155 / 239 page  DocID024030 Rev 9 155/238 STM32F427xx STM32F429xx Electrical characteristics 197 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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