Silicon Laboratories Si5372 User Manual
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Silicon Laboratories Si5372 User Manual

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UG372: Si5372 Evaluation Board User's
Guide
The Si5372-EVB is used for evaluating the Si5372 Any-Frequency, Any-Output, Jitter
Attenuating Clock Multiplier. The Si5372 combines 4
™
synth
technologies to enable any-frequency clock generation for applications that re-
quire the highest level of jitter performance. There are two different EVBs for the
Si5372. There is an A grade which uses an external XTAL reference and there is a J
grade which has an internal XTAL reference. This user guide is intended for all ver-
sions of the Si5372 EVB. The device grade and revision is distinguished by a white 1
inch x 0.187 inch label installed in the lower left hand corner of the board. In the exam-
ple below, the label "SI5372J-A-EB" indicates the evaluation board has been assem-
bled with an Si5372 device, Grade J, Revision A, installed. (For ordering purposes on-
ly, the terms "EB" and "EVB" refer to the board and the kit respectively. For the purpose
of this document, the terms are synonymous in context.)The device The Si5372-EVB
has two independent input clocks and four independent output clocks. The Si5372-EVB
can be controlled and configured using the ClockBuilderPro
silabs.com | Building a more connected world.
th
generation DSPLL and Multi-
™
(CBPro) software tool.
EVB FEATURES:
• Si5372A-A-EB for evaluating external
XTAL version Si5372A
• Onboard 48 MHz XTAL or Reference
SMA Inputs allow holdover mode of
operation on the Si5372.
• Si5372J-A-EB for evaluating internal XTAL
version Si5372J
• Powered from USB port or external power
supply.
• CBPro
™
GUI-programmable VDD supply
allows the device to operate from 3.3, 2.5,
or 1.8 V.
• CBPro GUI-programmable VDDO supplies
allow each of the ten 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 Si5372.
• SMA connectors for input clocks, output
clocks, and optional external timing
reference clock.
Rev. 1.0

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Summary of Contents for Silicon Laboratories Si5372

  • Page 1 There are two different EVBs for the • Si5372A-A-EB for evaluating external Si5372. There is an A grade which uses an external XTAL reference and there is a J XTAL version Si5372A grade which has an internal XTAL reference. This user guide is intended for all ver- •...

  • Page 2: Functional Block Diagram

    1. Functional Block Diagram A functional block diagram of the Si5372-EVB is shown below. Keep in mind the J grade does not use an external XTAL or reference and does not use the XA/XB pins. This EVB can be connected to a PC via the main USB connector for programming, control, and monitoring.

  • Page 3: Quick Start

    • Installation instructions and the user’s guide for ClockBuilderPro can also be found at the download link shown above. 2. Connect a USB cable from the Si5372-EVB to the PC where the software is installed. ™ 3. Leave the jumpers as installed from the factory, and launch the ClockBuilderPro software.

  • Page 4: Jumper Defaults

    JP12 2 pin JP13 2 pin JP17 5x2 Hdr All 5 installed Note: 1. Refer to the Si5372 EVB Schematics for the functionality associated with each jumper. silabs.com | Building a more connected world. Rev. 1.0 | 4...

  • Page 5: Status Leds

    UG372: Si5372 Evaluation Board User’s Guide Status LEDs 4. Status LEDs Table 4.1. Si5372 EVB Status LEDs Location Silkscreen Color Status Function Indication INTRB Blue DUT Interrupt LOLB Blue DUT Loss of Lock LOSXAXBB Blue DUT Loss of Reference +5V MAIN...

  • Page 6: External Reference Input (Xa/Xb)

    An external reference (XTAL) is required for Grade A 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 Si5372-EVB for these versions can also accommodate an external reference clock instead of a crystal.
  • Page 7 Input clocks are ac-coupled and 50 Ω terminated. This represents four differential input clock pairs. Single-ended clocks can be used by appropriately driving one side of the differential pair with a single-ended clock. See the Si5372 data sheet for details on how to config- ure inputs as single-ended.

  • Page 8: Clock Output Circuits (Outx/Outxb)

    The Si5372-EVB provides pads for optional output termination resistors and/or low frequency capacitors. Note: Components with schematic “NI” designation are not normally populated on the Si5372-EVB and provide locations on the PCB for optional dc/ac terminations by the end user.

  • Page 9: Installing Clockbuilder Pro Desktop Software

    UG372: Si5372 Evaluation Board User’s Guide Installing ClockBuilder Pro Desktop Software 8. Installing ClockBuilder Pro Desktop Software To install the CBOPro software on any Windows 7 (or above) PC, go to http://www.silabs.com/CBPro and download the ClockBuilder Pro software. Installation instructions and User’s Guide for ClockBuilder Pro can be found at the download link shown above.
  • Page 10 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB 9. Using Si5372 EVB 9.1 Connecting the EVB to Your Host PC ™ Once ClockBuilderPro software is installed, connect the software to the EVB with a USB cable, as shown in the figure below.
  • Page 11 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB ™ 9.2 Main Features of ClockBuilderPro Applications The ClockBuilderPro installer installs two main applications: the ClockBuilderPro Wizard and the EVB GUI. Figure 9.2. Application #1: ClockBuilderPro Wizard Use the CBPro Wizard to do the following: •...
  • Page 12 • Monitor voltage, current, power on the EVB. 9.3 Common ClockBuilderPro Workflow Scenarios There are three common workflow scenarios when using CBPro and the Si5372 EVB. These workflow scenarios are as follows: Workflow Scenario #1: Testing a Silicon Labs-created Default Configuration...
  • Page 13 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB 9.4 Workflow Scenario #1: Testing a Silicon Labs Created Default Configuration The flow for using the EVB GUI to initialize and control a device on the EVB is as follows. 1. Once the PC and EVB are connected, launch ClockBuilder Pro by clicking on this icon on your PC’s desktop.
  • Page 14 Using Si5372 EVB 4. Select "Yes" to write the default plan to the Si5372 device mounted on your EVB. This ensures the device is completely reconfig- ured per the Silicon Labs default plan for the DUT type mounted on the EVB.
  • Page 15 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB 6. The EVB GUI opens. All power supplies are set to the values defined in the device’s default CBPro project file created by Silicon Labs, as shown in the figure below.
  • Page 16 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB 9.4.1 Verify Free-run Mode Operation Assuming no external clocks have been connected to the INPUT CLOCK differential SMA connectors (labeled “INx/INxB”) located around the perimeter of the EVB, the DUT should now be operating in free-run mode, as the DUT will be locked to the crystal in this case.
  • Page 17 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB Figure 9.11. View Design Report Your configuration’s design report opens in a new window, as shown in the figure below. Compare the observed output clocks to the frequencies and formats noted in your default project’s Design Report.
  • Page 18 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB Figure 9.12. Design Report Window 9.4.2 Verify Locked Mode Operation Assuming you connect the correct input clocks to the EVB (as noted in the Design Report shown above), the DUT on your EVB will be running in “locked”...
  • Page 19 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB 9.5 Workflow Scenario #2: Modifying the Default Silicon Labs Created Device Configuration 1. To modify the “default” configuration using the CBPro Wizard, select "Edit Configuration with Wizard". Figure 9.13. Edit Configuration with Wizard silabs.com | Building a more connected world.
  • Page 20 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB 2. You will now be taken to the Wizard’s step-by-step menus to allow you to change any of the default plan’s operating configurations. Figure 9.14. Design Wizard Note: You can click on the icon on the lower left hand of the menu to confirm that your frequency plan is valid. After making your desired changes, you can click on "Write to EVB"...
  • Page 21 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB 9.6 Workflow Scenario #3: Testing a User Created Device Configuration 1. To test a previously-created user configuration, open the CBPro Wizard by clicking the icon on your desktop and then selecting "Open Project".
  • Page 22 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB 2. Locate your CBPro design file (*.slabtimeproj or *.sitproj file) design file in the Windows file browser. Figure 9.17. Browse to Project File silabs.com | Building a more connected world. Rev. 1.0 | 22...
  • Page 23 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB 3. Select "Yes" when the WRITE DESIGN to EVB popup appears: Figure 9.18. Write Design to EVB Dialog 4. The progress bar is 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 24 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB 9.7 Workflow Scenario #4: Convert Existing Project 1. If you have an existing Si5344H/42H CBPro project that you would like to convert to Si5372/71, click on "Convert Existing Project/NVM File. Figure 9.19. Convert Existing Project silabs.com | Building a more connected world.
  • Page 25 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB 2. Select "Si5344H CBPro Project Si5372 Project", for example. --> Figure 9.20. Select Project silabs.com | Building a more connected world. Rev. 1.0 | 25...
  • Page 26 3. Click on "Select Si5344H CBPro Project". Figure 9.21. Click on Select CBPro Project 4. You have now successfully converted a Si5344H project to Si5372 project. Write that to the device or keep making edits. silabs.com | Building a more connected world.
  • Page 27 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB 9.8 Exporting the Register Map File for Device Programming by a Host Processor You can also export your configuration to a file format suitable for in-system programming by selecting "Export", as shown in the figure below.
  • Page 28 UG372: Si5372 Evaluation Board User’s Guide Using Si5372 EVB Figure 9.23. Export Settings silabs.com | Building a more connected world. Rev. 1.0 | 28...

  • Page 29: 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 Si5372 using ClockBuilder- Pro on the Si5372 EVB. Writing a configuration into the EVB from ClockBuilderPro is done using Si5372 RAM space and can be done virtually unlimited number of times.
  • Page 30 Si5372 data sheet.) The figure below illustrates the J17 header schematic. J17 even numbered pins (2, 4, 6, etc.) connect to the Si5372 device and the odd numbered pins (1, 3, 5, etc.) connect to the MCU. Once the jumper shunts have been removed from J17 and JP1, I...
  • Page 31 The Si5372 EVB Schematic, Layout, and Bill of Materials (BOM) can be found online at: https://www.silabs.com/documents/public/schematic-files/SI5372-71-EVB.zip Note: Please be aware that the Si5372 EVB schematic is in OrCad Capture hierarchical format and not in a typical “flat” schematic format. This document supports the evaluation board silkscreened Si5372 EVB for the following configurations as described in the table below.
  • Page 32 Trademark Information Silicon Laboratories Inc.® , Silicon Laboratories®, Silicon Labs®, SiLabs® and the Silicon Labs logo®, Bluegiga®, Bluegiga Logo®, Clockbuilder®, CMEMS®, DSPLL®, EFM®, EFM32®, EFR, Ember®, Energy Micro, Energy Micro logo and combinations thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZRadio®, EZRadioPRO®, Gecko®, Gecko OS, Gecko OS Studio, ISOmodem®, Precision32®, ProSLIC®, Simplicity Studio®, SiPHY®, Telegesis, the Telegesis Logo®, USBXpress®...

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