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MPC8572ELVTAULD Datasheet(PDF) 87 Page - Freescale Semiconductor, Inc |
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MPC8572ELVTAULD Datasheet(HTML) 87 Page - Freescale Semiconductor, Inc |
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87 / 140 page  MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4 Freescale Semiconductor 87 PCI Express TRX-EYE-MEDIAN-to-MAX -JITTER Maximum time between the jitter median and maximum deviation from the median. — — 0.3 UI Jitter is defined as the measurement variation of the crossing points (VRX-DIFFp-p = 0 V) in relation to a recovered TX UI. A recovered TX UI is calculated over 3500 consecutive unit intervals of sample data. Jitter is measured using all edges of the 250 consecutive UI in the center of the 3500 UI used for calculating the TX UI. See Notes 2, 3 and 7. VRX-CM-ACp AC Peak Common Mode Input Voltage —— 150 mV VRX-CM-ACp = |VRXD+ +VRXD-|/2 - VRX-CM-DC VRX-CM-DC = DC(avg) of |VRX-D+ + VRX-D-|/2 See Note 2 RLRX-DIFF Differential Return Loss 15 — — dB Measured over 50 MHz to 1.25 GHz with the D+ and D- lines biased at +300 mV and -300 mV, respectively. See Note 4 RLRX-CM Common Mode Return Loss 6 — — dB Measured over 50 MHz to 1.25 GHz with the D+ and D- lines biased at 0 V. See Note 4 ZRX-DIFF-DC DC Differential Input Impedance 80 100 120 Ω RX DC Differential mode impedance. See Note 5 ZRX-DC DC Input Impedance 40 50 60 Ω Required RX D+ as well as D- DC Impedance (50 ± 20% tolerance). See Notes 2 and 5. ZRX-HIGH-IMP-DC Powered Down DC Input Impedance 200 k — — Ω Required RX D+ as well as D- DC Impedance when the Receiver terminations do not have power. See Note 6. VRX-IDLE-DET-DIFFp-p Electrical Idle Detect Threshold 65 — 175 mV VRX-IDLE-DET-DIFFp-p = 2*|VRX-D+ -VRX-D-| Measured at the package pins of the Receiver TRX-IDLE-DET-DIFF- ENTERTIME Unexpected Electrical Idle Enter Detect Threshold Integration Time — — 10 ms An unexpected Electrical Idle (VRX-DIFFp-p < VRX-IDLE-DET-DIFFp-p) must be recognized no longer than TRX-IDLE-DET-DIFF-ENTERING to signal an unexpected idle condition. Table 62. Differential Receiver (RX) Input Specifications (continued) Symbol Parameter Min Nominal Max Units Comments |
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