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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC8349EVVALDB датащи(PDF) 31 Page - Freescale Semiconductor, Inc |
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MPC8349EVVALDB датащи(HTML) 31 Page - Freescale Semiconductor, Inc |
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31 / 87 page  MPC8349EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 13 Freescale Semiconductor 31 Ethernet: Three-Speed Ethernet, MII Management Figure 16 shows the RBMII and RTBI AC timing and multiplexing diagrams. Figure 16. RGMII and RTBI AC Timing and Multiplexing Diagrams 8.3 Ethernet Management Interface Electrical Characteristics The electrical characteristics specified here apply to the MII management interface signals management data input/output (MDIO) and management data clock (MDC). The electrical characteristics for GMII, RGMII, TBI and RTBI are specified in Section 8.1, “Three-Speed Ethernet Controller (TSEC)—GMII/MII/TBI/RGMII/RTBI Electrical Characteristics.” 8.3.1 MII Management DC Electrical Characteristics The MDC and MDIO are defined to operate at a supply voltage of 2.5 or 3.3 V. The DC electrical characteristics for MDIO and MDC are provided in Table 32 and Table 33. Table 32. MII Management DC Electrical Characteristics Powered at 2.5 V Parameter Symbol Conditions Min Max Unit Supply voltage (2.5 V) LVDD — 2.37 2.63 V Output high voltage VOH IOH = –1.0 mA LVDD = Min 2.00 LVDD +0.3 V Output low voltage VOL IOL = 1.0 mA LVDD = Min GND – 0.3 0.40 V Input high voltage VIH —LVDD = Min 1.7 — V Input low voltage VIL —LVDD = Min –0.3 0.70 V GTX_CLK tRGT tRGTH tSKRGT TX_CTL TXD[8:5] TXD[7:4] TXD[9] TXERR TXD[4] TXEN TXD[3:0] (At Transmitter) TXD[8:5][3:0] TXD[7:4][3:0] TX_CLK (At PHY) RX_CTL RXD[8:5] RXD[7:4] RXD[9] RXERR RXD[4] RXDV RXD[3:0] RXD[8:5][3:0] RXD[7:4][3:0] RX_CLK (At PHY) tSKRGT tSKRGT tSKRGT |
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