10.2 Additional Power Supplies
Although additional power (besides the power supplied by the host PC’s USB port) is not needed for most configurations, two additional
+5 VDC power supplies (MAIN and AUX) can be connected to J33 and J34 (located on the bottom of the board, near the USB connec-
tor). Refer to the Si5395 EVB schematic for details.
The Si5395 EVB comes preconfigured with jumpers installed at JP15 and JP16 (pins 1–2 in both cases) in order to select “USB”. These
jumpers, together with the components installed, configure the evaluation board to obtain all +5 V power solely through the main USB
connector at J37. This setup is the default configuration and should normally be sufficient.
The following figure shows the correct installation of the jumper shunts at JP15 and JP16 for default or standard operation.
Figure 10.2. JP15–JP16 Standard Jumper Shunt Installation
Note:
Some early versions of the 64-pin Si534x-EVBs may have the silkscreen text at JP15–JP16 reversed regarding EXT and USB,
i.e., USB EXT instead of EXT USB. Regardless, the correct installation of the jumper shunts for default or standard operation is on the
right hand side as read and viewed in the figure above.
The general guidelines for single USB power supply operation are as follows:
• Use either a USB 3.0 or USB 2.0 port. These ports are specified to supply 900 mA and 500 mA, respectively, at +5 V.
• If you are working with a USB 2.0 port and you are current limited, turn off enough DUT output voltage regulators to drop the total
DUT current ≤470 mA. (Note: USB 2.0 ports may supply > 500 mA. Provided the n5 V drops gracefully by less than 10%,
the EVB will still work.)
• If you are working with a USB 2.0 and you are current-limited and need all output clock drivers enabled, reconfigure the EVB to drive
the DUT output voltage regulators from an ex5 V power supply as follows:
• Connect an ex5 V power supply to terminal block J33 on the back side of the PCB.
• Move the jumper at JP15 from pins 1–2 USB to pins 2–3 EXT.
10.3 Overview of ClockBuilderPro Applications
Note:
The following instructions and screen captures may vary slightly depending on the grade of your device and your version of
ClockBuilder Pro. (The screen captures below were taken for a board labeled "SI5395A-A-EB".) The ClockBuilderPro™ installer will
install
two
main applications:
UG335: Si5395 Evaluation Board User's Guide
Using the Si5395 EVB
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