mpc8640 Freescale Semiconductor, Inc, mpc8640 Datasheet - Page 74

• Manufacturer Part Number: mpc8640
• Description: Integrated Host Processor
• Manufacturer: Freescale Semiconductor, Inc

PCI Express
additional margin to adequately compensate for the degraded minimum Rx eye diagram (shown in
Figure
the return loss measured looking into the Rx package and silicon. The Rx eye diagram must be aligned in
time using the jitter median to locate the center of the eye diagram.
The eye diagram must be valid for any 250 consecutive UIs.
A recovered TX UI is calculated over 3500 consecutive unit intervals of sample data. The eye diagram is
created using all edges of the 250 consecutive UI in the center of the 3500 UI used for calculating the TX
UI.
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51) expected at the input receiver based on some adequate combination of system simulations and
Figure 51. Minimum Receiver Eye Timing and Voltage Compliance Specification
MPC8640 and MPC8640D Integrated Host Processor Hardware Specifications, Rev. 3
The reference impedance for return loss measurements is 50
both the D+ and D– line (that is, as measured by a vector network analyzer
with 50-
optional for the return loss measurement.
Ω
probes—see
Figure
52). Note that the series capacitors, C
NOTE
Ω
to ground for
TX
Freescale Semiconductor
, are