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MPC8315ECVRAGDA датащи(PDF) 67 Page - Freescale Semiconductor, Inc |
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MPC8315ECVRAGDA датащи(HTML) 67 Page - Freescale Semiconductor, Inc |
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67 / 112 page ![]() MPC8315E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 0 Freescale Semiconductor 67 PCI Express Figure 50. Minimum Transmitter Timing and Voltage Output Compliance Specifications 16.4.3 Differential Receiver (RX) Input Specifications Table 55 defines the specifications for the differential input at all receivers (RXs). The parameters are specified at the component pins. Table 55. Differential Receiver (RX) Input Specifications Parameter Symbol Comments Min Typical Max Units Notes Unit interval UI Each UI is 400 ps ± 300 ppm. UI does not account for Spread Spectrum Clock dictated variations. 399.88 400 400.12 ps 1 Differential peak-to-peak output voltage VRX-DIFFp-p VRX-DIFFp-p = 2*|VRX-D+ - VRX-D-| 0.175 — 1.200 V 2 Minimum receiver eye width TRX-EYE The maximum interconnect media and Transmitter jitter that can be tolerated by the Receiver can be derived as TRX-MAX-JITTER = 1 - URX-EYE= 0.6 UI. 0.4 ——UI 2, 3 [De-emphasized Bit] 566 mV (3 dB) >= VTX-DIFFp-p-MIN >= 505 mV (4 dB) [Transition Bit] VTX-DIFFp-p-MIN = 800 mV [Transition Bit] VTX-DIFFp-p-MIN = 800 mV 0.7 UI = UI – 0.3 UI(JTX-TOTAL-MAX) VTX-DIFF = 0 mV (D+ D– Crossing Point) VTX-DIFF = 0 mV (D+ D– Crossing Point) |
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