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STM32F427NET7TR Arkusz danych(PDF) 151 Page - STMicroelectronics |
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STM32F427NET7TR Arkusz danych(HTML) 151 Page - STMicroelectronics |
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151 / 231 page  DocID024030 Rev 6 151/231 STM32F427xx STM32F429xx Electrical characteristics 192 Ethernet characteristics Unless otherwise specified, the parameters given in Table 71, Table 72 and Table 73 for SMI, RMII and MII are derived from tests performed under the ambient temperature, fHCLK frequency summarized in Table 17 with the following configuration: • Output speed is set to OSPEEDRy[1:0] = 10 • Capacitive load C = 30 pF for 2.7 V < VDD < 3.6 V • Capacitive load C = 20 pF for 1.71 V < VDD < 3.6 V • Measurement points are done at CMOS levels: 0.5VDD. Refer to Section 6.3.17: I/O port characteristics for more details on the input/output characteristics. Table 71 gives the list of Ethernet MAC signals for the SMI (station management interface) and Figure 47 shows the corresponding timing diagram. Figure 47. Ethernet SMI timing diagram Table 71. 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) 411 420 425 ns Td(MDIO) Write data valid time 6 10 13 tsu(MDIO) Read data setup time 12 - - th(MDIO) Read data hold time 0 - - |
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