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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC8378ECVRALDA датащи(PDF) 27 Page - Freescale Semiconductor, Inc |
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MPC8378ECVRALDA датащи(HTML) 27 Page - Freescale Semiconductor, Inc |
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27 / 126 page  MPC8378E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 2 Freescale Semiconductor 27 Ethernet: Enhanced Three-Speed Ethernet (eTSEC) Figure 8. SGMII Transmitter DC Measurement Circuit 8.2.3 DC Requirements for SGMII SD_REF_CLK and SD_REF_CLK_B See Section 20.2.2, “DC Level Requirement for SerDes Reference Clocks.” 8.3 SGMII, MII, RGMII, RMII, and RTBI AC Timing Specifications The AC timing specifications for SGMII, MII, RGMII, RMII and RTBI are presented in this section. 8.3.1 SGMII AC Timing Specifications This section describes the SGMII transmit and receive AC timing specifications. Transmitter and receiver characteristics are measured at the transmitter outputs (L1_SD_TXn and L1_SD_TXn) or at the receiver inputs (L1_SD_RXn and L1_SD_RXn) as depicted in Figure 9 respectively. Figure 9. SGMII AC Test/Measurement Load 50 Ω Transmitter L1_SD_TX n L1_SD_TX n 50 Ω Vos VOD MPC8378E SGMII SerDes Interface 50 Ω 50 Ω TX C = CTX Silicon + Package C = CTX R = 50 Ω R = 50 Ω D+ Package Pin D– Package Pin |
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