Texas Instruments DS90UB925QSEVB, User Manual, Page: 4 / 36

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4 DS90UB925QSEVB User’s Guide Sept 2012
2. Board Setup Details
This section describes, in detail, the connectors and jumpers on the board as well as how to properly
connect, set up, and use the DS90UB925Q EVB.
2.1. Power Connections
1) Connect ground to J7.
2) Connect an external 3.3V into J6. This is the core voltage of the DS90UB925Q.
3) For VDDIO = 1.8V, connect ground to pin 2 of JP1.
4) Connect an external 1.8V into pin 1 of JP1. This is VDDIO power.
2.2. FPD-Link III Connection
J10, J11 – is the default SMA connector. The FPD-Link III serial stream comes out on J10 and J11. Note:
J10 is DOUT+, J11 is DOUT- of the DS90UB925Q. Connect to the deserializer from these two SMAs.
Typically the deserializer will be the DS90UB925Q.
2.3. Factory Set Switch Settings and Jumpers Default Configuration
S1, S2, S3, S4 and JP2 are factory configured as shown in Figure 2 for plug and play operation. For each
of these 3-pin headers JP2, a jumper must be placed as shown.
1) The S1 switch is factory set as shown below.
The PDB switch is set HIGH and will turn on the DS90UB925Q upon power up.
SW2 is a momentary switch. Instead of toggling switch 1 of S1 to do a PDB toggle, press SW2 to do a
PDB toggle.