Silicon Laboratories Si5 UC-EVB Series Manual
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Silicon Laboratories Si5 UC-EVB Series Manual

Silicon Laboratories Si5 UC-EVB Series Manual

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UG298: Si5xxUC-EVB
Universal Oscillator Evaluation Board
This document describes operation of the Silicon Laboratories Si5xxUC-EVB evaluation
board designed to evaluate any of Silicon Labs' pin-controlled or I2C configurable Si5xx
XOs or VCXOs. Three device sites are available to support one of either 5mm x 7mm,
3.2mm x 5mm, or 2.5mm x 3.2mm devices in either 4, 6, or 8 pin configurations. Selec-
tor switches make it easy to configure device control pins (pins 1, 2, 7, or 8) for proper
operation without the use of jumpers. Similarly, XO device VDD voltage (3.3V, 2.5V,
1.8V) can be selected via switches based on either external +5V (for stand-alone opera-
tion) or micro USB sourced +5V USB operation. The EVB also features flexible output
termination circuits and PCB layout optimized for superior signal integrity.
Ext +5V
micro
USB
+VDD
GND
SDA
Vc_In
+VDD
GND
SCL
+VDD
GND
SDA
+VDD
GND
SCL
silabs.com | Building a more connected world.
Power
Select
Switch
Silicon Labs
SDA
MCU
Pin 1
SCL
I2C Bus
Pin 2
Pin 1
Pin 7
Pin 1
Signal
Pin 8
Selector
Switch
Pin 1
Pin 2
Signal
Pin 2
Pin 2
Selector
Switch
Pin 7
Pin 8
Pin 7
Pin 7
Signal
Selector
Pin 1
Switch
Pin 2
Pin 8
Pin 7
Pin 8
Signal
Selector
Pin 8
Switch
KEY FEATURES
• Evaluation of any Silicon Labs XO or
VCXO (Si51x, Si53x, Si54x, Si55x, Si56x,
Si57x, Si59x)
• AC coupled differential/single-ended output
clocks.
• Voltage control (Vc) port for VCXO
evalution.
• Switch selectable settings. No jumpers.
• External power or USB powered.
• Use stand-alone or with our
grammable Oscillator Calculator SW tool
Voltage
Power
Selector
Supply
Switches
+VDD
XO
Location 1
Output
Termination
(5mm x 7mm)
XO
Location 2
Output
Termination
(3.2mm x 5mm)
XO
Location 3
Output
Termination
(2.5mm x 3.2mm)
Pro-
CLK1_P
CLK1_N
CLK2_P
CLK2_N
CLK3_P
CLK3_N
Rev. 0.3

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Summary of Contents for Silicon Laboratories Si5 UC-EVB Series

  • Page 1 UG298: Si5xxUC-EVB Universal Oscillator Evaluation Board KEY FEATURES This document describes operation of the Silicon Laboratories Si5xxUC-EVB evaluation board designed to evaluate any of Silicon Labs’ pin-controlled or I2C configurable Si5xx • Evaluation of any Silicon Labs XO or VCXO (Si51x, Si53x, Si54x, Si55x, Si56x, XOs or VCXOs.

  • Page 2: Table Of Contents

    Table of Contents 1. Quick Start - Board Configuration Check List ....3 2. Functional Description......4 3.

  • Page 3: Quick Start - Board Configuration Check List

    UG298: Si5xxUC-EVB Quick Start - Board Configuration Check List 1. Quick Start - Board Configuration Check List Mount your oscillator device on the board at appropriate oscillator site location (U1, U2, or U3, but on only one location) if a device is not yet mounted.

  • Page 4: Functional Description

    UG298: Si5xxUC-EVB Functional Description 2. Functional Description The Si5xxUC-EVB is an evaluation board designed to support any Silicon Labs XO/VCXO device. The Si5xxUC-EVB is designed to operate in one of two general operational modes: • Stand-alone mode: The stand-alone mode is for evaluation of fixed output frequency or pin-controlled XO/VCXO devices where I2C support is NOT required to operate or evaluate the device.

  • Page 5: General Operational Restrictions

    UG298: Si5xxUC-EVB General Operational Restrictions 3. General Operational Restrictions 3.1 Evaluate Only a Single Device at a Time Note: It is strongly recommended to populate only one device on the Si5xxUC-EVB board at a time. Carefully read the next paragraph for important information.

  • Page 6: Power Supply And I2C Bus Control

    UG298: Si5xxUC-EVB Power Supply and I2C Bus Control 4. Power Supply and I2C Bus Control The power supply uses a linear voltage regulator to drop the +5V input supply voltage to one of the supported nominal VDD voltages of +3.3V, +2.5V, or +1.8 V. A switch is provided on the EVB (SW5) to select the +5V source for the voltage regulator as either the USB port +5V or an external +5V source.

  • Page 7: Control Signal Switch Settings

    UG298: Si5xxUC-EVB Control Signal Switch Settings 5. Control Signal Switch Settings Four of the 5 on-board DIP switches (SW1, 2, 3, 4) are used for configuration of the EVB oscillator locations to match any standard oscillator pin-out. Using this DIP switch arrangement, the Si5xxUC-EVB can be configured to support all Silicon Labs oscillator devices. The oscillator device pins that can vary in function, depending on the device variant, are pins 1, 2, 7, and 8 as shown in the Device Pin- out Mapping table below.

  • Page 8: Oscillator Pin 1 Control Dip Switch (Pin_1_Ctrl)

    UG298: Si5xxUC-EVB Control Signal Switch Settings 5.1 Oscillator Pin 1 Control DIP Switch (Pin_1_Ctrl) The pin 1 control DIP switch allows oscillator pin 1 to be driven from any of these 4 sources. 1. High (VDD) level 2. Low (GND) level 3.

  • Page 9: Oscillator Pin 2 Control Dip Switch (Pin_2_Ctrl)

    UG298: Si5xxUC-EVB Control Signal Switch Settings 5.2 Oscillator Pin 2 Control DIP Switch (Pin_2_Ctrl) This DIP switch allows oscillator pin 2 to be driven from 1 of 3 sources. 1. High (VDD) level 2. Low (GND) level 3. I2C bus SCL signal Note: The 3 signal sources listed above are located on separate pins on the left side of the switch and all pins on the right side are tied together (common) and then connect to pin 2 of the oscillator.

  • Page 10: Oscillator Pin 7 Control Dip Switch (Pin_7_Ctrl)

    UG298: Si5xxUC-EVB Control Signal Switch Settings 5.3 Oscillator Pin 7 Control DIP Switch (Pin_7_Ctrl) This DIP switch allows oscillator pin 7 to be driven from 1 of 3 sources. 1. High (VDD) level 2. Low (GND) level 3. I2C bus SDA signal Note: The 3 signal sources listed above are located on separate pins on the left side of the switch and all pins on the right side are tied together (common) and then connect to pin 7 of the oscillator.

  • Page 11: Oscillator Pin 8 Control Dip Switch (Pin_8_Ctrl)

    UG298: Si5xxUC-EVB Control Signal Switch Settings 5.4 Oscillator Pin 8 Control DIP Switch (Pin_8_Ctrl) This DIP switch allows oscillator pin 8 to be driven from 1 of 3 sources. 1. 1. High (VDD) level 2. 2. Low (GND) level 3. 3. I2C bus SCL signal Note: The 3 signal sources listed above are located on separate pins on the left side of the switch and all pins on the right side are tied together (common) and then connect to pin 8 of the oscillator.

  • Page 12: Supported Devices - Stand-Alone Mode

    UG298: Si5xxUC-EVB Supported Devices - Stand-Alone Mode 6. Supported Devices - Stand-Alone Mode If using the Si5XXUC-EVB with a device that is either fixed frequency or has pin-controlled output frequency, this “Stand-alone mode” section should be used to configure the EVB. If you have a device installed that utilizes the I2C bus for making frequency or other changes to the device, please refer to Section 7.
  • Page 13 UG298: Si5xxUC-EVB Supported Devices - Stand-Alone Mode SiLabs Type # Freqs # pins Pkg sizes (mm Pin 1 Pin 2 Pin 7 Pin 8 Pin 4 Out- Pin 5 Out- Device x mm) Control Control Control Control Si533 Dual (CMOS) Si534 Quad CLK+...
  • Page 14 UG298: Si5xxUC-EVB Supported Devices - Stand-Alone Mode Table 6.2. Pin Controlled VCXOs SiLabs Type # Freqs # pins Pkg sizes Pin 1 Pin 2 Pin 7 Pin 8 Pin 4 Out- Pin 5 Out- Device (mm x mm) Control Control Control Control Si565...

  • Page 15: Supported Devices - Software Controlled Mode - I

    UG298: Si5xxUC-EVB Supported Devices - Software Controlled Mode - I2C 7. Supported Devices - Software Controlled Mode - I If using the Si5XXUC-EVB with a device that utilizes the I2C bus for making frequency or other changes to the device, this “software controlled mode”...

  • Page 16: Usb Port And External Powering

    UG298: Si5xxUC-EVB USB Port and External Powering 8. USB Port and External Powering The USB port on the Si5xxUC-EVB utilizes a micro-USB connector that is located on the left edge of the board on bottom side. A 2 meter micro USB cable is provided with the EVB kit. Any micro USB cable can be used that supports full USB connectivity. If powering the EVB via the USB port, make sure switch SW5 is in the “USB”...

  • Page 17: Output Clock Terminations

    UG298: Si5xxUC-EVB Output Clock Terminations 9. Output Clock Terminations The drawing in the figure below shows the default output termination circuit for CLK1 output of the Si5xxUC-EVB. This default source termination is for typical 3.3V LVPECL. CLK2 and CLK3 are also terminated similarly for 3.3V LVPECL. If not using LVPECL, this termi- nation circuit may require component modification.

  • Page 18: Evb Test Points And Leds

    UG298: Si5xxUC-EVB EVB Test Points and LEDs 10. EVB Test Points and LEDs 10.1 Test Points The Si5xxUC-EVB has many test points that are useful for probing various nodes and/or making connections to external test equip- ment. Please refer to the schematic for functions of the various test points. One set of test points in particular provides oscillator current sense capability and is shown in the drawing below.

  • Page 19: Vcxo Voltage Control Input Circuit

    UG298: Si5xxUC-EVB VCXO Voltage Control Input Circuit 11. VCXO Voltage Control Input Circuit The drawing below shows the VCXO control voltage input (VC_IN) circuit used for evaluation of VCXOs. The VCXO control voltage can be applied using the J1 SMA connector, or using TP3/TP6. A simple RC circuit is included to low-pass filter any noise on the input. The RC circuit components can be removed or modified as required for your application.

  • Page 20: Programmable Oscillator Calculator Tool

    UG298: Si5xxUC-EVB Programmable Oscillator Calculator Tool 12. Programmable Oscillator Calculator Tool The Programmable Oscillator Software Tool can be used with the Si5xxUC-EVB. This tool and corresponding Programmable Oscillator Software Tool User's Guide can be found www.silabs.com/oscillator-tools. silabs.com | Building a more connected world. Rev.

  • Page 21: Layout Of Board

    UG298: Si5xxUC-EVB Layout of Board 13. Layout of Board silabs.com | Building a more connected world. Rev. 0.3 | 21...

  • Page 22: Si5Xxuc-Evb Schematic

    UG298: Si5xxUC-EVB Si5xxUC-EVB Schematic 14. Si5xxUC-EVB Schematic silabs.com | Building a more connected world. Rev. 0.3 | 22...
  • Page 23 UG298: Si5xxUC-EVB Si5xxUC-EVB Schematic silabs.com | Building a more connected world. Rev. 0.3 | 23...
  • Page 24 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®, ISOmodem®, Micrium, Precision32®, ProSLIC®, Simplicity Studio®, SiPHY®, Telegesis, the Telegesis Logo®, USBXpress®, Zentri, Z-Wave, and others are trademarks or...

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