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Si5346 E
VALUATION
Description
The Si5346-EVB is used for evaluating the Si5346
Any-Frequency, Any-Output, Jitter-Attenuating Clock
Multiplier. The Si5346 contains 2 independent DSPLLs
in a single IC with programmable jitter attenuation
bandwidth on a per DSPLL basis. The Si5346-EVB
supports 4 independent input clocks and 4 independent
clock outputs via on-board SMA connectors. The
Si5346-EVB can be controlled and configured using the
ClockBuilderPro
(CBPro
are provided on-board for external monitoring of supply
voltages.
Rev. 1.0 5/15
B
OARD
) software tool. Test points
Figure 1. Si5346 Evaluation Board
Copyright © 2015 by Silicon Laboratories
S i 5 3 4 6 - E V B
U
'
G
SER
S
U I D E
EVB Features
Powered from USB port or external power supply.
Onboard 48 MHz XTAL allows standalone or
holdover mode of operation on the Si5346.
CBPro
GUI programmable V
device to operate from 3.3, 2.5, or 1.8 V.
CBPro
GUI programmable V
each of the 4 outputs to have its own power supply
voltage selectable from 3.3, 2.5, or 1.8 V.
CBPro
GUI allows control and measurement of
voltage, current, and power of V
supplies.
Status LEDs for power supplies and control/status
signals of Si5346.
SMA connectors for input clocks, output clocks, and
optional external timing reference clock.
supply allows
DD
supplies allow
DDO
and all 4 V
DD
DDO
Si5346-EVB

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  • Page 1 ’ VALUATION OARD U I D E Description EVB Features The Si5346-EVB is used for evaluating the Si5346  Powered from USB port or external power supply. Any-Frequency, Any-Output, Jitter-Attenuating Clock  Onboard 48 MHz XTAL allows standalone or Multiplier. The Si5346 contains 2 independent DSPLLs holdover mode of operation on the Si5346.
  • Page 2 1. Si5346-EVB Functional Block Diagram Below is a functional block diagram of the Si5346-EVB. This EVB can be connected to a PC via the main USB connector for programming, control, and monitoring. See section “3. Quick Start” or section “9. Installing ClockBuilderPro (CBPro) Desktop Software”...
  • Page 3: Quick Start

     1. Install ClockBuilderPro desktop software from http://www.silabs.com/CBPro. 2. Connect a USB cable from Si5346-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 run a frequency plan on the Si5346-EVB.
  • Page 4: Jumper Defaults

    Si5346-EVB 4. Jumper Defaults Si5346 EVB Jumper Defaults I = Installed I = Installed Location Type Location Type 0 = Open 0 = Open 2 pin 2 pin 2 pin 2 pin 3 pin 1 to 2 (USB) 5x2 Hdr All 5 installed Refer to the Si5346 EVB schematics for the functionality associated with each jumper.
  • Page 5: Status Leds

    Si5346-EVB 5. Status LEDs Si5346 EVB Status LEDs Location Silkscreen Color Status Function Indication LOS_XAXBB Blue XA/XB Loss of Signal indicator INTRB Blue MCU INTR (Interrupt) active LOL_BB Blue DSPLL A Loss of Lock indicator LOL_AB Blue DSPLL B Loss of Lock indicator +5V MAIN...
  • Page 6: Clock Input Circuits (Inx/Inxb)

    Figure 5 below. 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 Si5346-EVB provides an L-network at OUT0/OUT0B output pins for optional output termination resistors. Note that components with schematic “NI”...
  • Page 7 Si5346-EVB 8. External Reference Clock Input Circuit (XA/XB) The Si5346 EVB supports either XTAL or external reference clock on XA/XB. By default, the XTAL is populated. If a reference clock is required for testing, remove Y1 and place C93/C94. A low-jitter reference clock can then be applied to J25/J26.
  • Page 8 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 connector). Refer to the Si5346-EVB schematic for details. Rev. 1.0...
  • Page 9 Si5346-EVB  10.3. Overview of ClockBuilderPro Applications  The ClockBuilderPro installer will install two main applications: Figure 8. Application #1: ClockbuilderPro Wizard Use the CBPro Wizard to:  Create a new design  Review or edit an existing design ...
  • Page 10 Si5346-EVB 10.4. Common ClockBuilderPro  Work Flow Scenarios There are three common workflow scenarios when using CBPro and the Si5346 EVB. These workflow scenarios are:  Workflow Scenario #1: Testing a Silicon Labs-Created Default Configuration  Workflow Scenario #2: Modifying the Default Silicon Labs-Created Device Configuration ...
  • Page 11 Si5346-EVB Figure 13. Writing Design Status After CBPro writes the default plan to the EVB, click on “Open EVB GUI” as shown below. Figure 14. Open EVB GUI The EVB GUI will appear. Note all power supplies will be set to the values defined in the device’s default CBPro project file created by Silicon Labs, as shown below.
  • Page 12 Si5346-EVB Figure 16. Write Design to EVB Failure to do the step above will cause the device to read in a pre-programmed plan from its non-volatile memory (NVM). However, the plan loaded from the NVM may not be the latest plan recommended by Silicon Labs for evaluation.
  • Page 13 Si5346-EVB Figure 18. Design Report Window 10.5.2. 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” mode.
  • Page 14 Si5346-EVB 10.6. Workflow Scenario #2: Modifying the Default Silicon Labs-Created Device Configuration To modify the “default” configuration using the CBPro Wizard, click on Edit Configuration with Wizard: Figure 19. Edit Configuration with Wizard 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.
  • Page 15 Si5346-EVB Note you can click on the icon on the lower left hand corner of the menu to confirm if your frequency plan is valid. After making your desired changes, you can click on Write to EVB to update the DUT to reconfigure your device real-time.
  • Page 16 Si5346-EVB Locate your CBPro design file (*.slabtimeproj or *.sitproj file).design file in the Windows file browser. Figure 23. Browse to Project File Select Yes when the WRITE DESIGN to EVB popup appears: Figure 24. Write Design to EVB Dialog 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 17 Si5346-EVB 10.8. 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 below: Figure 25. Export Register Map File You can now write your device’s complete configuration to file formats suitable for in-system programming.
  • Page 18 Si5346-EVB Figure 26. Export Settings Rev. 1.0...
  • Page 19: Writing A New Frequency Plan Or Device Configuration To Non-Volatile Memory (Otp)

    The Si5346 EVB Schematic and Bill of Materials (BOM) can be found online at http://www.silabs.com/products/clocksoscillators/pages/si538x-4x-evb.aspx Note: Please be aware that the Si5346-EVB schematic is in OrCad Capture hierarchical format and not in a typical “flat” sche- matic format. Rev. 1.0...
  • Page 20 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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