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STM32F405 Datasheet(PDF) 131 Page - STMicroelectronics |
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STM32F405 Datasheet(HTML) 131 Page - STMicroelectronics |
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131 / 204 page  DS8626 Rev 9 131/203 STM32F405xx, STM32F407xx Electrical characteristics Ethernet characteristics Unless otherwise specified, the parameters given in Table 64, Table 65 and Table 66 for SMI, RMII and MII are derived from tests performed under the ambient temperature, fHCLK frequency summarized in Table 14 and VDD supply voltage conditions summarized in Table 63, with the following configuration: • Output speed is set to OSPEEDRy[1:0] = 10 • Capacitive load C = 30 pF • Measurement points are done at CMOS levels: 0.5VDD. Refer to Section 5.3.16: I/O port characteristics for more details on the input/output characteristics. Table 64 gives the list of Ethernet MAC signals for the SMI (station management interface) and Figure 46 shows the corresponding timing diagram. Figure 46. Ethernet SMI timing diagram Table 65 gives the list of Ethernet MAC signals for the RMII and Figure 47 shows the corresponding timing diagram. Table 63. Ethernet DC electrical characteristics Symbol Parameter Min.(1) 1. All the voltages are measured from the local ground potential. Max.(1) Unit Input level VDD Ethernet operating voltage 2.7 3.6 V Table 64. Dynamic characteristics: Ethernet MAC signals for SMI(1) 1. Guaranteed by characterization. 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 - - MS31384V1 ETH_MDC ETH_MDIO(O) ETH_MDIO(I) tMDC td(MDIO) tsu(MDIO) th(MDIO) |
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