mpc8536e Freescale Semiconductor, Inc, mpc8536e Datasheet - Page 103

• Manufacturer Part Number: mpc8536e
• Description: Mpc8536e Powerquicctm Iii Integrated Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

2.21.4.2
The TX eye diagram in
any real PCI Express interconnect + RX component.
There are two eye diagrams that must be met for the transmitter. Both eye diagrams must be aligned in time using the jitter
median to locate the center of the eye diagram. The different eye diagrams will differ in voltage depending whether it is a
transition bit or a de-emphasized bit. The exact reduced voltage level of the de-emphasized bit will always be relative to the
transition bit.
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.
Figure 69. Minimum Transmitter Timing and Voltage Output Compliance Specifications
Transmitter Compliance Eye Diagrams
It is recommended that the recovered TX UI is calculated using all edges in the 3500
consecutive UI interval with a fit algorithm using a minimization merit function (that is,
least squares and median deviation fits).
Figure 69
is specified using the passive compliance/test measurement load (see
NOTE
Figure
71) in place of