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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F756VG датащи(PDF) 168 Page - STMicroelectronics |
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STM32F756VG датащи(HTML) 168 Page - STMicroelectronics |
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168 / 228 page  Electrical characteristics STM32F756xx 168/228 DocID027589 Rev 4 Table 86 gives the list of Ethernet MAC signals for the RMII and Figure 56 shows the corresponding timing diagram. Figure 56. Ethernet RMII timing diagram Table 85. Dynamics characteristics: Ethernet MAC signals for SMI(1) 1. Guaranteed by characterization results. Symbol Parameter Min Typ Max Unit tMDC MDC cycle time(2.38 MHz) 400 400 403 ns Td(MDIO) Write data valid time 10 10.5 12.5 tsu(MDIO) Read data setup time 12.5 - - th(MDIO) Read data hold time 0 - - Table 86. Dynamics characteristics: Ethernet MAC signals for RMII(1) 1. Guaranteed by characterization results. Symbol Parameter Min Typ Max Unit tsu(RXD) Receive data setup time 1 - - ns tih(RXD) Receive data hold time 1.5 - - tsu(CRS) Carrier sense setup time 1 - - tih(CRS) Carrier sense hold time 1 - - td(TXEN) Transmit enable valid delay time 5 6 10.5 td(TXD) Transmit data valid delay time 5 6 12 |
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