1. Install the Si5356 ClockBuilder™ Desktop Software and driver. (Assumes that Microsoft .NET Framework 1.1 is
already installed.)
2. Connect a USB cable from the EVB to the PC where the software was installed.
3. Leave the jumpers as installed from the factory and launch the Si5356 configuration software by clicking on
Start Programs Silicon LaboratoriesClockBuilder Desktop Software.
4. Click on the “ClockBuilder Desktop” to configure the Si5356 using the graphical user interface.
2. Functional Description
A function block diagram of the EVB is shown in Figure 2. The MCU performs the USB to I2C conversion, controls
the voltage regulators, monitors the INTR pin, and controls the three status LEDs. There are five programmable
voltage regulators (VDD, VDDOA, VDDOB, VDDOC, VDDOD), which supply power to the Si5356 device. VDD and
VDDO jumpers allow the option of powering the device from external supplies or as a convenient point for
measuring current. I
another I
2
C master.
The Si5356 EVB is shipped with an on-board 25 MHz XTAL to allow stand-alone asynchronous operation. The
Si5356 can be synchronized to an external reference using the CLKIN input and selecting the external reference
using the ClockBuilder Desktop software.
2
C jumpers allow disconnecting the Si5356 from the I2C bus to allow external control from
Figure 2. EVB Functional Block Diagram
2Rev. 0.2
Si5356-EVB
2.1. Status LEDS
There are three status LEDs on the EVB:
RDY (Green) indicates that the EVB is operating as normal. This LED should always be on.
BUSY (Green) lights when there is active communication between the PC, the MCU, and the Si5356.
INTR (Red) indicates the MCU has detected that the interrupt pin of the Si5356 device is enabled. The most
probable cause for an interrupt is because the Si5356 has lost its input signal or the PLL has lost lock. The
“Status” tab of the GUI will identify the event that caused the interrupt to happen.
2.2. Inputs
The Si5356 EVB provides two reference options - using the on-board XTAL or an external reference.
Note: Si5356-EVB Rev 1.0 does not support synchronous operation using the CLKIN input. This feature will be supported in
future revisions.
2.2.1. External Input reference
An SMA connector (CLKIN) is provided to receive an external single-ended CMOS signal. This input is dc-coupled
to the device. The signal should have a minimum amount of dc bias to ensure that it never swings below ground
level.
2.2.2. On-board XTAL
The on-board 25 MHz allows the Si5356 EVB to generate asynchronou s clocks. To use this option, select the XT AL
input from the Si5356 “ClockBuilder Desktop” software.
2.3. Outputs (CLK0-CLK7)
Each of the eight output clocks can be accessed using SMA connectors. The outputs are dc-coupled (no in-line dc
blocking capacitors between the output pin and the SMA connector).
2.4. Control Pins
Header J7 located on the backside of the Si5356 EVB allows setting three Si5356 control pins: SSC_DIS,
I2C_LSB, and OEB.
2.4.1. SSC_DIS
This pin allows disabling of the spread spectrum feature on the output clocks. Spread spectrum is disabled when
the jumper is installed.
2.4.2. I2C_LSB
This pin is the least significant bit of the Si5356 I
2
I
C bus. I2C address of the Si5356 = 0x70 when the jumper is installed. I2C address of the Si5356 = 0x71 when the
jumper is not installed.
2.4.3. OEB
This pin allows disabling all output clocks. All outputs are enabled when the jumper is installed.
2
C address allowing up to two Si5356 devices to occupy the same
2.5. Voltage Regulators
The Si5356 EVB has five built-in programmable voltage regulators to allow setting of the VDD supply (to 3.3 V,
2.5 V, and 1.8 V) and the four VDDO supplies (to 3.3 V, 2.5 V, and 1.8 V). The voltage level on each of these
supplies can be set independently.
2.6. Reset Switch
A reset switch is provided to reset communication between the PC and Si5356 EVB.
Rev. 0.23
Si5356-EVB
3. ClockBuilder Desktop Software Installation
The following sections describe how to install and begin using the software. There is also a readme.txt file with the
installation files as well as a user guide installed with the software.
3.1. System Requirements
Microsoft Windows 2000 or Windows XP
USB 2.0
2 MB of free hard drive space
1024 x 768 screen resolution or greater
Microsoft .NET Framework 1.1
USBXpress 3.1.1 driver
Note: USBXpress 3.1.1 driver is provided and installed with the software. Newer or older versions of USBXpress available
from other EVB kits or online have not been tested with this software.
3.2. Microsoft .NET Framework Installation
The Microsoft .NET Framework is required before installing and running the software. Details and installation
information about the .NET Framework are available via a shortcut in the NETFramework directory or at the
following web site:
There are multiple versions of the .NET Framework available from Microsoft, and they can be installed side-by-side
on the same computer. The software requires version 1.1. Contact your system administrator for more details.
3.3. ClockBuilder Desktop Software Installation
The ClockBuilder Desktop Software is installed from the ClockBuilderDesktopSwInstall.exe file.
1. Double-click the install file to start the wizard.
2. Follow the wizard instructions to complete the installation for both the software and the driver. Use the default
installation location for best results.
3. After the installation is complete, click on Start Programs Silicon Laboratories ClockBuilder Desktop Software. Select one of the items in the menu in cluding the User Guide to get mo re det ails on how to
run the software.
Close all the programs and help files before running the uninstaller to ensure complete removal of the software.
The driver software must be uninstalled separately. See “3.6. USBXpress Driver Installation” for details.
To uninstall the software, use the Add and Remove Programs utility in the Control Panel, as shown in Figure 3.
Figure 3. Uninstall in Add and Remove Programs
Rev. 0.25
Si5356-EVB
3.5. ClockBuilder Desktop Software Description
There are several programs to control the Si5356 device. These are available by clicking
Start Programs Silicon Laboratories ClockBuilder Desktop Software X.X, where X.X is the software
version number. There is a detailed user guide accessible here and in the Help Help Menu option of the
software.
Table 1. Programs
ProgramDescription
ClockBuilder DesktopThis automatically programs the necessary registers based on the customer's
desired frequency plan for the Si5356 device.
Bit Field ProgrammerThis utility provides access to each bit field in the register map of the device; no
masking and shifting is required to decode each setting or control in the register
map.
Register ProgrammerThis provides low-level control of the device with individual 8-bit register accesses.
3.6. USBXpress Driver Installation
The EVB uses the Silicon Laboratories' USBXpress driver to allow the EVB to communicate with the computer via
USB.
The driver is installed after the EVB software is installed. Click Install to run the driver installation. Clicking Cancel
will not install any files, and the EVB will not work with the software.
Figure 4. Driver Installer Dialog
Note: If the driver has already been installed on the computer before, it will not be reinstalled, and a message box will appear
as shown in Figure 5.
Figure 5. Driver Already Installed
The installer will copy the necessary driver files and update the operating system. However, for every different EVB
connected to the same computer, the hardware installation wizard will run to associate this driver with the new
EVB. Let the wizard run with its default settings. Figure 6 shows a successful driver installation.
6Rev. 0.2
Si5356-EVB
Figure 6. Successful Driver Installation
Rev. 0.27
Si5356-EVB
The USBXpress driver may be removed via the Add and Remove Programs utility in the Control Panel. Locate the
entry called Silicon Laboratories USBXpress Device. Click the button, and it should show the version and location
of what it will remove.
Figure 7. Driver Uninstall Location
The USBXpress installation files are located with the ClockBuilder Desktop Software. The driver files for the EVB
may be reinstalled from this location or by running the install software.
Figure 8. Driver Installation Files
8Rev. 0.2
4. Si5356-EVB Schematics
OEB
SSC_DIS
I2C_LSB
VDDOB
VDDOD
VDDOC
VDD
VDDOA
+3.3V
VDD +3.3V
SDA_5338
SCL_5338
INTRPT
Si5356
Place close to output pins
These traces need to be 50 ohms and be of equal length.
Updated F igu re 3 on page 5.
Removed “Uninstaller Option” figure.
Updated F igu re 8 on page 8.
Si5356-EVB
Rev. 0.215
ClockBuilder Pro
One-click access to Timing tools,
documentation, software, source
code libraries & more. Available for
Windows and iOS (CBGo only).
www.silabs.com/CBPro
Timing Portfolio
www.silabs.com/timing
Disclaimer
Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers
using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific
device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories
reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy
or completeness of the included information. Silicon Laboratories shall have no liability for the consequences of use of the information supplied herein. This document does not imply
or express copyright licenses granted hereunder to design or fabricate any integrated circuits. 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. Silicon Laboratories products are generally not intended for military applications. Silicon Laboratories products shall under no
circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons.
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