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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STR910FAM32X6 датащи(PDF) 65 Page - STMicroelectronics |
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STR910FAM32X6 датащи(HTML) 65 Page - STMicroelectronics |
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65 / 78 page  STR91xFA Electrical characteristics 65/78 6.15 Communication interface electrical characteristics 6.15.1 10/100 Ethernet MAC electrical characteristics VDDQ = 2.7 - 3.6V, VDD = 1.65 - 2V, TA = -40 / 85 °C unless otherwise specified. Ethernet MII Interface Timings Figure 18. MII_RX_CLK and MII_TX_CLK timing diagram Table 28. MII_RX_CLK and MII_TX_CLK timing table Figure 19. MDC timing diagram Table 29. MDC timing table Ethernet MII management timings Figure 20. Ethernet MII management timing diagram Symbol Parameter Symbol Value Unit Min Max 1 Cycle time tc(CLK) 40 ns 2 Pulse duration HIGH tHIGH(CLK) 40% 60% 3 Pulse duration LOW tLOW(CLK) 40% 60% 4 Transition time tt(CLK) 1ns Symbol Parameter Symbol Value Unit Min Max 1 Cycle time tc(MDC) 266 ns 2 Pulse duration HIGH tHIGH(MDC) 40% 60% 3 Pulse duration LOW tLOW(MDC) 40% 60% 4 Transition time tt(MDC) 1ns MII_RX_TCLK, MII_TX_CLK 1 2 3 4 4 1 2 3 4 4 MDC 1 2 3 MDC MDIO output MDIO input |
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