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Si5380 Evaluation Board User's Guide
The Si5380-EVB is used for evaluating the Ultra Low Jitter, Any-
Frequency, 12-output JESD204B Clock Generator. The Si5380
employs 4th generation DSPLL technology to enable clock gen-
eration for LTE/ JESD204B applications which require the high-
est level of jitter performance. The Si5380-EVB has four inde-
pendent input clocks and a total of 12 outputs. The Si5380-EVB
can be easily controlled and configured using Silicon Labs' Clock
Builder Pro™ (CBPro™) software tool.
silabs.com | Smart. Connected. Energy-friendly.
EVB FEATURES
• Powered from USB port or external power
supply
• Onboard 54 MHz XTAL or Reference SMA
Inputs allow holdover mode of operation on
the Si5380
• CBPro™ GUI programmable VDD supply
allows device to operate from 3.3, 2.5, or
1.8 V
• CBPro™ GUI programmable VDDO
supplies allow each of the ten primary
outputs to have its own supply voltage
selectable from 3.3, 2.5, or 1.8 V
• CBPro™ GUI-controlled voltage, current,
and power measurements of VDD and all
VDDO supplies
• Status LEDs for power supplies and
control/status signals of Si5380
• SMA connectors for input clocks, output
clocks and optional external timing
reference clock
Rev. 1.1

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  • Page 1 Si5380 Evaluation Board User's Guide The Si5380-EVB is used for evaluating the Ultra Low Jitter, Any- EVB FEATURES Frequency, 12-output JESD204B Clock Generator. The Si5380 employs 4th generation DSPLL technology to enable clock gen- • Powered from USB port or external power...
  • Page 2: Si5380 Functional Block Diagram

    Si5380 Functional Block Diagram 1. Si5380 Functional Block Diagram Below is a functional block diagram of the Si5380-EVB. This EVB can be connected to a PC via the main USB connector for program- ming, control, and monitoring. See 2. Quick Start and Jumper Defaults 6.1 Installing ClockBuilderPro (CBPro) Desktop Software...
  • Page 3: Quick Start And Jumper Defaults

    1. Install ClockBuilderPro desktop software. http://www.silabs.com/CBPro 2. Connect a USB cable from the Si5380-EVB to the PC where the software was installed. 3. Leave the jumpers as installed from the factory, and launch the ClockBuilderPro software. 4. You can use ClockBuilderPro to create, download, and verify a frequency plan on the Si5380-EVB.
  • Page 4: Status Leds

    Main USB +5 V present D27, D22, and D26 are illuminated when USB +5 V, Si5380 +3.3 V, and Si5380 Output +5 V supply voltages, respectively, are present. D25, D21, and D24 are status LEDs showing on-board MCU activity. D11 and D12 are status indicators from the DUT.
  • Page 5: External Reference Input (Xa/Xb)

    An external reference (XTAL) is used in combination with the internal oscillator to produce an ultra-low jitter reference clock for the DSPLL and for providing a stable reference for the free-run and holdover modes. The Si5380-EVB can also accommodate an external reference clock instead of a crystal.
  • Page 6: Clock Input And Output Circuits

    The output signal will have no dc bias. If dc coupling is required, the ac coupling capacitors can be replaced with a resistor of appropriate value. The Si5380-EVB provides pads for optional output termination resistors and/or low fre- quency capacitors.
  • Page 7: Using The Si5380 Evb And Installing Clockbuilderpro (Cbpro) Desktop Software

    Si5380 Evaluation Board User's Guide Using the Si5380 EVB and Installing ClockBuilderPro (CBPro) Desktop Software 6. Using the Si5380 EVB and Installing ClockBuilderPro (CBPro) Desktop Software 6.1 Installing ClockBuilderPro (CBPro) Desktop Software To install the CBPro software on any Windows 7 (or above) PC: Go to http://www.silabs.com/si538x-4x-evb...
  • Page 8 In this case, J33 can be used to provide power to the output drivers separately from the main SI5380 device supplies. To make this change, move jumper JP15 to connect pins 2-3 “EXT”. Connect J33 to an external 5 V, 0.5A or higher, power source. Make sure that the polarity of the +5 V and GND connections are correct.
  • Page 9 Si5380 Evaluation Board User's Guide Using the Si5380 EVB and Installing ClockBuilderPro (CBPro) Desktop Software 6.4 Overview of ClockBuilderPro Applications The ClockBuilderPro installer will install two main applications. Application 1: Figure 6.4. ClockBuilderPro Wizard Use the CBPro Wizard to do the following: •...
  • Page 10 Using the Si5380 EVB and Installing ClockBuilderPro (CBPro) Desktop Software 6.5 Common ClockBuilderPro Work Flow Scenarios There are three common workflow scenarios when using CBPro and the Si5380 EVB. These workflow scenarios are: • Workflow Scenario #1: Testing a Silicon Labs-created Default Configuration •...
  • Page 11 Using the Si5380 EVB and Installing ClockBuilderPro (CBPro) Desktop Software Figure 6.8. CBPro—Write Design Dialog Select “Yes” to write the default plan to the Si5380 device mounted on your EVB. This ensures the device on the EVB is configured with the latest parameters from Silicon Labs.
  • Page 12 Si5380 Evaluation Board User's Guide Using the Si5380 EVB and Installing ClockBuilderPro (CBPro) Desktop Software 6.6.1 Verify Free-Run Mode Operation Assuming no external clocks have yet been connected to the INPUT CLOCK differential SMA connectors, labeled “INx/INxB” and loca- ted around the perimeter of the EVB, the DUT should now be operating in free-run mode and locked to the EVB crystal.
  • Page 13 Si5380 Evaluation Board User's Guide Using the Si5380 EVB and Installing ClockBuilderPro (CBPro) Desktop Software Figure 6.14. CBPro—Design Report 6.6.2 Verify Locked Mode Operation Now, assuming that you connect the input clocks to the EVB as shown in the Design Report above, the DUT on your EVB will be run- ning in “locked”...
  • Page 14 Si5380 Evaluation Board User's Guide Using the Si5380 EVB and Installing ClockBuilderPro (CBPro) Desktop Software 6.7 Workflow Scenario #2: Modifying the Default Silicon Labs-Created Device Configuration To modify the configuration using the CBPro Wizard, click on the appropriate category. The category may also be selected from a drop- down list by clicking on the “Design Dashboard”...
  • Page 15 Si5380 Evaluation Board User's Guide Using the Si5380 EVB and Installing ClockBuilderPro (CBPro) Desktop Software As you edit the settings, you may notice the “Frequency Plan Valid” link in the lower left corner updating. You can click on this link to bring up the design report to confirm that the information is correct.
  • Page 16 Si5380 Evaluation Board User's Guide Using the Si5380 EVB and Installing ClockBuilderPro (CBPro) Desktop Software 6.8 Workflow Scenario #3: Testing a User-Created Device Configuration Figure 6.18. CBPro—Open Design Project Link Using the windows file browser popup, locate your CBPro design file (*.slabtimeproj or *.sitproj file).
  • Page 17 Si5380 Evaluation Board User's Guide Using the Si5380 EVB and Installing ClockBuilderPro (CBPro) Desktop Software The progress bar will be launched. Once the new design project file has been written to the device, verify the presence and frequencies of your output clocks and other operating configurations using external instrumentation.
  • Page 18: Writing A New Frequency Plan Or Device Configuration To Non-Volatile Memory (Otp)

    Note: Writing to the device non-volatile memory (OTP) is NOT the same as writing a configuration into the Si5380 using ClockBuilder- Pro on the Si5380 EVB. Writing a configuration into the EVB from ClockBuilderPro is done using Si5380 RAM space and can be done virtually an unlimited number of times.
  • Page 19: Serial Device Communications (Si5380 Mcu)

    Si5380 data sheet.) The figure below illustrates the J36 header schematic. J36 even numbered pins (2, 4, 6, etc.) connect to the Si5380 device and the odd numbered pins (1, 3, 5, etc.) connect to the MCU. Once the jumper shunts have been removed from J36 and J4, I...
  • Page 20: Si5380-Evb Schematic And Bill Of Materials (Bom)

    The Si5380 EVB Schematic and Bill of Materials (BOM) can be found online at: http://www.silabs.com/si538x-4x-evb Note: Please be aware the Si5380 EVB schematic is in OrCad Capture hierarchical format and not in a typical “flat” schematic format. silabs.com | Smart. Connected. Energy-friendly.
  • Page 21 The products must not be used within any Life Support System without the specific written consent of Silicon Laboratories. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal injury or death.

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