Ethernet Loopback Cable - Freescale Semiconductor i.MX53 Quick Start Manual

Hardware Reference Manual for i.MX53 Quick Start
16) MMC/SD Test. If the user selects this test to be run, the user will be prompted to insert an
MMC/SD card into the full size SD Card slot (J5). When the user confirms that the card is
present, the processor will attempt to read the current SD card settings and manufacturing
information on the SD card. If the Processor can read this information, the test passes.
The only special equipment required to complete the bank of OBDS tests is the Ethernet Loop back
cable. This can be purchased on line (single plug Ethernet Lookback Cable) or it can be created by the
developer by cutting one end of an unneeded Ethernet cable and connecting the wire from pin 1 to the
wire from pin3, and connecting the wire from pin 2 to the wire from pin 6. All other wires remain
unconnected. The four wires used will be solid Green, solid Orange, Green/White stripe, and
Orange/White stripe. The solid colors are connected together and the striped colors are connected
together. While the solid colors will always be connected to pins 2 and 6, the specific pin a color is
attached to will depend on which plug is used. The same is true for the striped wires connected to pins 1
and 3. A diagram of this cable is shown in Figure 37 below.
Freescale Semiconductor
Hardware User Guide for i.MX53 Quick Start Board,
Figure 37. Ethernet Loopback Cable
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