User`s guide

i.MX53 Layout Recommendations
i.MX53 System Development User’s Guide, Rev. 1
2-28 Freescale Semiconductor
Figure 2-28 shows the dimensions of a stripline and microstrip pair. Figure 2-29 shows the differential pair
routing.
Figure 2-28. Microstrip and Stripline Differential Pair Dimensions
Figure 2-29. Differential Pair Routing
• The space between two adjacent differential pairs should be greater than or equal to twice the space
between the two individual conductors.
• The skew between LVDS pairs should be within the minimum recommendation (± 100 mil).
2.10 Reference Resistors
Freescale reference designs have resistors that are used for reference in the interfaces. These resistors need
to be in the following pins:
• USB_H1_RREFEXT