Silicon Labs Si5380-D-EVB User's Guide

Silicon Labs Si5380-D-EVB  User's Guide
Si5380-D Evaluation Board User's Guide
The Si5380-D-EVB is used for evaluating the Ultra Low Jitter, AnyFrequency, 12-output JESD204B Clock Generator. The Si5380
employs fourth-generation DSPLL technology to enable clock generation for LTE/ JESD204B applications which require the highest
level of jitter performance. The Si5380-D-EVB has four independent input clocks and a total of 12 outputs. The Si5380-D-EVB can
be easily controlled and configured using Silicon Labs’ Clock
Builder Pro™ (CBPro™) software tool.
The device revision is distinguished by a white 1 inch x 0.187 inch label with the text
“SI5380-D-EB” installed in the lower left hand corner of the board. (For ordering purposes only, 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.)
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
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Si5380-D Evaluation Board User's Guide
Si5380 Functional Block Diagram
1. Si5380 Functional Block Diagram
Below is a functional block diagram of the Si5380-D-EVB. This EVB can be connected to a PC via the main USB connector for programming, control, and monitoring. See 2. Quick Start and Jumper Defaults or 6.1 Installing ClockBuilderPro (CBPro) Desktop Software
for more information.
Note: All Si5380 schematics, BOMs, User’s Guides, and software can be found online at the following link: http://www.silabs.com/
si538x-4x-evb
Power only
+5V_USB
Ext +5V
Connector
SPI
Conn
C8051F380
MCU
+
Peripherals
Input Clock 1
Input Clock 2
Input Clock 3
{
{
{
{
VDDO_0
VDDO_1
VDDO_2
VDDO_3
VDDO_4
VDDO_5
VDDO_6
VDDO_7
VDDO_8
VDDO_9
I2C/SPI Bus
CLKOUT_0A
CLKOUT_0AB
Output
Termination
Control/
Status
CLKOUT_0
CLKOUT_0B
Output
Termination
CLKOUT_1
CLKOUT_1B
Output
Termination
CLKOUT_2
CLKOUT_2B
Output
Termination
CLKOUT_3
CLKOUT_3B
Output
Termination
CLKOUT_4
CLKOUT_4B
Output
Termination
CLKOUT_5
CLKOUT_5B
Output
Termination
CLKOUT_6
CLKOUT_6B
Output
Termination
CLKOUT_7
CLKOUT_7B
Output
Termination
CLKOUT_8
CLKOUT_8B
Output
Termination
CLKOUT_9
CLKOUT_9B
Output
Termination
CLKOUT_9A
CLKOUT_9AB
Output
Termination
INTR
Alarm_Status
54 MHz
XTAL
Input Clock 0
VDDO_0
VDDO_1
VDDO_2
VDDO_3
VDDO_4
VDDO_5
VDDO_6
VDDO_7
VDDO_8
VDDO_9
VDDMCU
I2C
Ext Aux +5V
Connector
VDD_3.3
+5V_Aux
VDD_3.3
Power Supply
Power only
VDD_Core
USB Aux +5V
Connector
VDD_Core
USB +5V
Connector
XA
XB
Input
Termination
CLKIN_0
Input
Termination
CLKIN_1
Input
Termination
CLKIN_2
Input
Termination
CLKIN_3
CLKIN_0B
CLKIN_1B
CLKIN_2B
CLKIN_3B
Si5380
}
}
}
}
}
}
}
}
}
}
}
}
Output Clock 0A
Output Clock 0
Output Clock 1
Output Clock 2
Output Clock 3
Output Clock 4
Output Clock 5
Output Clock 6
Output Clock 7
Output Clock 8
Output Clock 9
Output Clock 9A
Figure 1.1. Functional Block Diagram of Si5380-D-EVB
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Si5380-D Evaluation Board User's Guide
Quick Start and Jumper Defaults
2. Quick Start and Jumper Defaults
Perform the following steps to quick-start the ClockBuilderPro software.
1. Install ClockBuilderPro desktop software. http://www.silabs.com/CBPro
2. Connect a USB cable from the Si5380-D-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-D-EVB.
5. For the Si5380 data sheet, go to: http://www.silabs.com/timing and search for Si5380 datasheet.
The following table lists the Si5380 EVB jumper defaults.
Table 2.1. Si5380-D EVB Jumper Defaults*
Location
Type
I = Installed
Location
Type
O= Open
I = Installed
O= Open
JP1
2 pin
O
JP23
2 pin
O
JP2
2 pin
O
JP24
3 pin
all open
JP3
2 pin
O
JP25
2 pin
O
JP4
2 pin
I
JP26
3 pin
all open
JP5
2 pin
O
JP27
2 pin
O
JP6
2 pin
O
JP28
3 pin
all open
JP7
2 pin
I
JP29
2 pin
O
JP8
2 pin
O
JP30
3 pin
all open
JP9
2 pin
O
JP31
2 pin
O
JP10
2 pin
O
JP32
3 pin
all open
JP13
2 pin
O
JP33
2 pin
O
JP14
2 pin
I
JP34
3 pin
all open
JP15
3 pin
1 to 2
JP35
2 pin
O
JP16
3 pin
1 to 2
JP36
3 pin
all open
JP17
2 pin
O
JP39
2 pin
O
JP18
3 pin
all open
JP40
2 pin
O
JP19
2 pin
O
JP41
2 pin
O
JP20
3 pin
all open
JP21
2 pin
O
JP22
3 pin
all open
J36
5x2 Hdr
All 5 installed
Note: Refer to the Si5380-D-EVB schematics for the functionality associated with each jumper.
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Si5380-D Evaluation Board User's Guide
Status LEDs
3. Status LEDs
Table 3.1. Si5380-D EVB Status LEDs
Location
Silkscreen
Color
Status Function Indication
D11
INTRB
Blue
DUT Interrupt Active
D12
LOLB
Blue
DUT Loss of Lock Indicator
D21
READY
Green
MCU Ready
D22
3P3V
Blue
DUT +3.3 V is present
D24
BUSY
Green
MCU Busy
D25
INTR
Red
MCU Interrupt active
D26
VDD DUT
Blue
DUT VDD voltage present
D27
5VUSBMAIN
Blue
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.
Figure 3.1. Status LEDs
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Si5380-D Evaluation Board User's Guide
External Reference Input (XA/XB)
4. 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-D-EVB can also accommodate an external reference clock instead of a crystal. To evaluate the device with a REFCLK, C111 and C113 must be populated and the XTAL removed (see figure below). The REFCLK can then be applied to J39 and J40.
Note: The remaining components marked “NI” are not installed.
Figure 4.1. External Reference Input Circuit
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Si5380-D Evaluation Board User's Guide
Clock Input and Output Circuits
5. Clock Input and Output Circuits
5.1 Clock Input Circuits (INx/INxB and FB_IN/FB_INB)
The Si5380-D-EVB has eight SMA connectors (IN0/IN0B–IN2/IN2B and IN3(FB_IN)/IN3B(FB_INB)) for receiving external clock signals.
All input clocks are terminated as shown in the figure below. Note 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 singleended clock. For details on how to configure inputs as single-ended, please refer to the Si5380 data sheet.
Figure 5.1. Input Clock Termination Circuit
5.2 Clock Output Circuits (OUTx/OUTxB)
Each of the twenty-four output drivers (12 differential pairs) is ac coupled to its respective SMA connector. The output clock termination
circuit is shown in the figure 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 Si5380-D-EVB provides pads for optional output termination resistors and/or low frequency capacitors. Note that components with schematic “NI” designation are not normally populated on the Si5380-D-EVB, and provide locations on the PCB for optional dc/ac terminations by the end user.
Figure 5.2. Output Clock Termination Circuit
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Si5380-D Evaluation Board User's Guide
Using the Si5380-D EVB and Installing ClockBuilderPro (CBPro) Desktop Software
6. Using the Si5380-D 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 and download the ClockBuilderPro software.
Installation instructions, release notes, and a user’s guide for ClockBuilderPro can be found at the download link shown above. Please
follow the instructions as indicated.
6.2 Connecting the EVB to Your Host PC
Once ClockBuilderPro software in installed, connect to the EVB with a USB cable as shown below.
Figure 6.1. EVB Connection Diagram
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Si5380-D Evaluation Board User's Guide
Using the Si5380-D EVB and Installing ClockBuilderPro (CBPro) Desktop Software
6.3 Additional Power Supplies
The Si5380-D-EVB comes preconfigured with jumpers installed on 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 +5 V power to all EVB power solely
through the J37 USB connector. This setup is the default EVB configuration and is sufficient to configure the device and run multiple
clock outputs simultaneously.
In some cases when enabling all outputs or at high output frequencies, the EVB requires more power than a single USB connection can
provide. This may result in intermittent device behavior or unexplained increases in jitter/phase-noise. This condition may be checked
using the EVB GUI, which is described further below. Selecting the “All Voltages” tab of the GUI and clicking on the “Read All” button
produces a display similar to this one:
Figure 6.2. EVB GUI - Power Supply Check
Verify that the “RAIL_5V” measurement shows the EVB voltage > 4.7 V. An EVB voltage lower than this level may cause the issues
described above.
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. Verify that the RAIL_5V voltage is 4.7 V or higher. The EVB should be powered by the USB connector when turning this auxiliary 5 V supply on or off.
See the figure below for the correct installation of the jumper shunts at JP15 and JP16 for default or standard operation.
Figure 6.3. JP15-JP16 Standard Jumper Shunt Installation
Errata 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 above figure.
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Si5380-D Evaluation Board User's Guide
Using the Si5380-D EVB and Installing ClockBuilderPro (CBPro) Desktop Software
6.4 Overview of ClockBuilderPro Applications
Note: The following instructions and screen captures may vary slightly depending on your version of ClockBuilder Pro.
The ClockBuilderPro installer will install two main applications.
Application 1:
Figure 6.4. ClockBuilderPro Wizard
Use the CBPro Wizard to do the following:
• Create a new design.
• Review or edit an existing design.
• Export: Create in-system programming files.
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Si5380-D Evaluation Board User's Guide
Using the Si5380-D EVB and Installing ClockBuilderPro (CBPro) Desktop Software
Application 2:
Figure 6.5. EVB GUI
Use the EVB GUI to do the following:
• Download configuration to EVB’s DUT (Si5380).
• Control the EVB’s regulators.
• Monitor voltage, current, power on the EVB.
6.5 Common ClockBuilderPro Work Flow Scenarios
There are three common workflow scenarios when using CBPro and the Si5380-D-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
• Workflow Scenario #3: Testing a User-created Device Configuration
Each is described in more detail in the following sections.
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Si5380-D Evaluation Board User's Guide
Using the Si5380-D EVB and Installing ClockBuilderPro (CBPro) Desktop Software
6.6 Workflow Scenario #1: Testing a Silicon Labs-Created Default Configuration
Verify that the PC and EVB are connected, then launch ClockBuilder Pro by clicking on this icon on your PC’s desktop:
Figure 6.6. ClockBuilder Pro Icon
CBPro automatically detects the EVB and device type. When the EVB has been detected, click on the “Open Default Plan” button.
Figure 6.7. CBPro—Open Default Plan Button
Once you open the default plan, a popup will appear.
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Si5380-D Evaluation Board User's Guide
Using the Si5380-D 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.
Figure 6.9. CBPro—Write Progress Window
After CBPro writes the default plan to the EVB, click on “Open EVB GUI” as shown in the figure below.
Figure 6.10. CBPro—Open EVB GUI Button
The EVB GUI window will appear on the desktop. Note all power supplies on the “Regulators” tab will be set to the values defined in
the device’s default CBPro project, as shown in the figure below.
Figure 6.11. EVB GUI—Regulators
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Si5380-D Evaluation Board User's Guide
Using the Si5380-D 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 located around the perimeter of the EVB, the DUT should now be operating in free-run mode and locked to the EVB crystal.
You can run a quick check to determine if the device is powered up, generating output clocks, and consuming power by clicking on the
“Read All” button highlighted above and then reviewing the voltage, current and power readings for each VDDx supply.
Note: Turning VDD or VDDA “Off” will power-down and reset the DUT. Once both of these supplies are turned “On” again, you must
reload the desired frequency plan back into the device memory by selecting the “Write Design to EVB” button on the CBPro home
screen:
Figure 6.12. CBPro—Write Design Button
Failure to do the step above will cause the device to read in the preprogrammed 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.
At this point, you should verify the presence and frequencies of the output clocks, running in free-run mode from the crystal, using external instrumentation connected to the output clock SMA connectors, labeled OUTx/OUTs. To verify plan inputs, go to the appropriate
configuration page or click on “Frequency Plan Valid” to see the design report.
Figure 6.13. CBPro—Design Report Button and Link
Your configuration’s design report will appear in a new window, as shown below. Compare the observed output clocks to the frequencies and formats noted in your default project’s Design Report.
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Si5380-D Evaluation Board User's Guide
Using the Si5380-D 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 running in “locked” mode.
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Si5380-D Evaluation Board User's Guide
Using the Si5380-D 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 dropdown list by clicking on the “Design Dashboard” button above this section.
Figure 6.15. CBPro—Edit Settings Links and Pulldown
You will now be taken to the Wizard’s step-by-step menu pages to allow you to change any of the default plan’s operating configurations.
Figure 6.16. CBPro—Design ID and Notes Edit Page
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Si5380-D Evaluation Board User's Guide
Using the Si5380-D 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. When you are finished editing each page, you may click on the “>
Next” or “< Back” buttons to move from page to page. When you are done making all your desired changes, you can click on “Write to
EVB” to reconfigure your device. The Design Write status window will appear each time you write to the EVB.
Figure 6.17. CBPro—Design Write Progress Window
When you have verified your design settings, you may save the design project. Click on the “Finish” button to return to the home page
and then click on the “Save Design to Project File” link. You can use the windows file browser to reach the correct location and enter a
filename for this new project.
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Si5380-D Evaluation Board User's Guide
Using the Si5380-D 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).
Figure 6.19. CBPro—Windows File Browser
Select “Yes” when the WRITE DESIGN to EVB popup appears:
Figure 6.20. CBPro—Write Design Dialog
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Si5380-D Evaluation Board User's Guide
Using the Si5380-D 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.
6.9 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 6.21. CBPro—Export Design Programming File
You can now write your device’s complete configuration to file formats suitable for in-system programming.
Figure 6.22. CBPro—Export Configuration Window
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Si5380-D Evaluation Board User's Guide
Writing A New Frequency Plan or Device Configuration to Non-volatile Memory (OTP)
7. Writing A New Frequency Plan or Device Configuration to Non-volatile Memory (OTP)
The Si5380 device loads the Non-Volatile Memory (OTP) on either a powerup or a hard reset, overwriting any previous volatile register
changes. This allows the device to begin functioning as desired on powerup/hard-reset without manual intervention. To restart the device while preserving volatile changes and without loading the OTP, use soft-reset through the registers or EVB-GUI.
Note: Writing to the device non-volatile memory (OTP) is NOT the same as writing a configuration into the Si5380 using ClockBuilderPro on the Si5380-D 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. Writing to OTP is limited as described below.
Refer to the Si5380 Family Reference Manual and device datasheet for information on how to write a configuration to the EVB DUT’s
non-volatile memory (OTP). The OTP can be programmed a maximum of two times only. Care must be taken to ensure the configuration desired is valid when choosing to write to OTP.
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Si5380-D Evaluation Board User's Guide
Serial Device Communications (Si5380 <-> MCU)
8. Serial Device Communications (Si5380 <-> MCU)
8.1 Onboard SPI Support
The MCU on-board the Si5380-D-EVB communicates with the Si5380 device through a 4-wire SPI (Serial Peripheral Interface) link. The
MCU is the SPI master and the Si5380 device is the SPI slave. The Si5380 device can also support a 2-wire I2C serial interface, although the Si5380-D-EVB does NOT support the I2C mode of operation. SPI mode was chosen for the EVB because of the relatively
higher speed transfers supported by SPI vs. I2C.
8.2 External I2C Support
I2C can be supported if driven from an external I2C controller. The serial interface signals between the MCU and Si5380 pass through
shunts loaded on header J36. These jumper shunts must be installed in J36 for normal EVB operation using SPI with CBPro. If testing
of I2C operation via external controller is desired, the shunts in J36 can be removed thereby isolating the on-board MCU from the
Si5380 device. The shunt at J4 (I2C_SEL) must also be removed to select I2C as Si5380 interface type. An external I2C controller connected to the Si5380 side of J36 can then communicate to the Si5380 device. (For more information on I2C signal protocol, please refer
to the 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, I2C operation should
use J36 pin 4 (DUT_SDA_SDIO) as the I2C SDA and J36 pin 8 (DUT_SCLK) as the I2C SCLK. Please note the external I2C controller
will need to supply its own I2C signal pull-up resistors.
Figure 8.1. Serial Communications Header J36
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Si5380-D Evaluation Board User's Guide
Si5380-D-EVB Schematic and Bill of Materials (BOM)
9. Si5380-D-EVB Schematic and Bill of Materials (BOM)
The Si5380-D 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-D EVB schematic is in OrCad Capture hierarchical format and not in a typical “flat” schematic format.
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"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
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