Texas Instruments SCAU020 User's Manual
Contents
1. OutrutDivider po Settings to EEPROM Enable VCO Calibration Charge Pump Current Setting FeedbackDivider SS 500 wa DPR Stat Read back mode VCD Calixalion Control Byte Values Loop Filter Control Setting VCO Calibration Word sro Load Config from File ration Chronos IC Config Die 02279 Config sm Block A s EIER 2 TI Test Use Save Config to Fie S to EVM BlockD Dite5 00 0000 ibias_100ua ave Config to Figure 7 Chronos GUI Manual PLL Block Selection Pop Up SCAUO020 March 2007 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board 11 Submit Documentation Feedback ChronosGUl 9 INSTRUMENTS www ti com Table 1 lists the various menu items in this screen Table 1 Software Settings Description Section Function VCO Select Selects between VCO1 and VCO2 Only one VCO can be used during operation See CDCE421 data sheet for VCO tuning ranges Prescalar The prescalar selection is determined in conjunction with VCO and output divider selection See the CDCE421 data sheet to determine the proper setting Output Divider The output divider is determined in conjunction with the VCO and prescalar settings See the CDCE421 data sheet to determine the proper setting Driver Select Selects between LVPECL or LVDS output PECL Config This option should be activated when using LVPECL output When s2. TEXAS INSTRUMENTS 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board User s Guide March 2007 Serial Link Products SCAUO020 SCAU020 March 2007 Submit Documentation Feedback Contents 1 General rcg sie nen aan anna ea aan anna ee 5 2 Signal Path and Control Circuitry 2 0 0 2 cece cece eee eee eee eee eee nn ann eene eene nene 6 3 Block EI 7 3 1 BOCK 7 3 2 Block 7 3 3 Do gem M l 7 34 Block D ML 7 4 Software Selectable Options nene one dante ana an dan ana 7 5 Installing the Software GUI and USB 8 6 Chronos 9 6 1 Using Software Enabled Automatic PLL Selection 9 6 2 Manual PLL Block Selection Advanced Control 11 7 Configuring the Board a ana RIP ann nahe 13 7 1 Programming and Testing Configuration USB Cable Attached Default Configuration 13 7 2 Programming Configuration USB Cable 13 7 3 Testing Configuration from Saved Configuration w
3. mu 15 et V VCO 1 input range 29 5Mhz 36 5Mhz VCO 2 input range 34 1Mhz 42 OMhz v LVPECL Termination EVM Optionts IC Block Contig o USB communication BiockA C BlockB C Block D V Enable board power Advanced Control Note Click on the indivdual blocks to change the device settings Ready Figure 5 TI Chronos Software GUI 6 1 Using Software Enabled Automatic PLL Selection The software illustration Figure 5 shows the on chip PLL structure of the CDCE421 Through this screen the user can change the Input Frequency PFD Charge Pump Loop Filter and Output Type The other features are selected by the software user selectable options are described in this section Step 1 IC Block Configuration and Input Calculator Before programming the PLL the specific EVM block that is being programmed must be selected in the C Block Config section of the GUI For any block in the EVM being used the first row of calculations is useful when trying to investigate the input frequency to the CDCE421 needed to obtain a desired output frequency The input frequency is obtained by pressing the Calculate button Step 2 Store Crystal Frequency If a crystal input is used for Block B of the EVM the crystal frequency must be entered into the space provided click on the Device EEPROM drop down menu at the top of the software GUI A menu item labeled Save Block B XTAL Freq to EEPROM appears this menu item must be sele
4. It generates uses and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules which are designed to provide reasonable protection against radio frequency interference Operation of this equipment in other environments may cause interference with radio communications in which case the user at his own expense will be required to take whatever measures may be required to correct this interference EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 0 5V to 4 0V and the output voltage range of OV to 3 6V Exceeding the specified input range may cause unexpected operation and or irreversible damage to the EVM If there are questions concerning the input range please contact a TI field representative prior to connecting the input power Applying loads outside of the specified output range may result in unintended operation and or possible permanent damage to the EVM Please consult the EVM User s Guide prior to connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation some circuit components may have case temperatures greater than 120 The EVM is designed to operate properly with certain components above 85 as long as the input and output ranges are maintained These components include but are not limited
5. always an integer multiple or integer divide of the input frequency and is determined through selection of VCO1 or VCO2 and the appropriate prescalar and output divider based on the CDCE421 data sheet The loop filter selection affects the output frequency phase noise and should be considered in conjunction with the type of input used In LVDS mode the device can achieve up to 500MHz output In LVPECL mode the device can achieve 1175MHz output The output signaling level and LVPECL termination are selectable through the software interface ER PUR Enabled switch QLVPECL TERM en NUT BLOCK B 028 BLOCK B PUR 5 a Disabled switch TERM er gt gt v00 xt WU IM 02 9 BLOCK C PUR D 0 30 BLOCK 0 PUR gt PE EI m pe oSDATA LAVPECL_TERN Figure 2 CDCE421EVM Programming Blocks 6 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board SCAUO20 March 2007 Submit Documentation Feedback Wi INSTRUMENTS www ti com Block Description 3 Block Description 3 1 3 2 3 3 3 4 This section discusses the four EVM blocks Block A Block A includes a CDCE421 QFN device that accepts an LVCMOS reference input through the vertical SMA input connector Ref Input which is ac coupled onto the board Block B This block includes a CDCE421 QFN device that uses an AT cut crystal This block can be used as either an XO or a VCXO For use
6. driver is in the same location Figure 4 Installation Prompt SCAU020 March 2007 8 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board Submit Documentation Feedback 35 INSTRUMENTS www ti com ChronosGUI After the setup wizard completes start the GUI interface from the Start menu Start2 Texas InstrumentsChronos Connect the USB cable to the EVM If Microsoft Windows prompts you an appropriate driver do not use the automatic search option Select a manual installation When prompted for the driver location browse to the Chronos GUI file folder that was created during installation If the operating system does not ask for a driver no additional action is needed Once the USB driver installation completes the GUI software should connect properly and be ready for use A green light in the USB communication box indicates a good USB connection a red light indicates a faulty USB connection If the connection is not established attempt to re install the drivers 6 ChronosGUI Figure 5 shows the Chronos GUI used to navigate the EVM software Ti TIChronosttriGui Untitled E 5 View Device EEPROM EVMFirmware Help 85 9 Input Calculator Required Input Frequency MHz Desired Output Frequency MHz Apply Output Calculator Input Frequency MHz Calculate gt Possible outputs v MHz Apply Loop Filter Output Prescaler ck
7. CE421EVM the respective switch must be turned on as explained earlier 7 1 Programming and Testing Configuration USB Cable Attached Default Configuration By default the CDCE421EVM is configured to operate with the USB cable attached and 3 3V power supply added to AUX VDD and GND In this configuration the USB microcontroller is powered by the USB port 5V supply while the CDCE421 is powered by the 3 3V external supply This setup is optimal for programming the CDCE421 device while also taking measurements This configuration removes the power variations inherent with USB power supplies by isolating the CDCE421 from the USB supply 7 2 Programming Configuration USB Cable Attached CDCE421EVM can also use power supplied through the USB cable as its sole power source However because of power supply variance in the USB supply this configuration is not recommended for most measurements Users are advised to enable this setup for saving configuration settings to the CDCE421 and later powering the device from its internal memory This option is useful if there is not a USB port available in a lab or test area In this configuration JP1 must be moved from its default position to the new position shown in Figure 8 The Enable onboard power checkbox must be selected on the EVM software followed by pushing the Apply button see Figure 5 Using external Using only USB 3 3V power supply Figure 8 JP1 Setting for USB Programming Configu
8. ON LON 1nONYOS NINYOS N3NYOS V1nOlS31 1531 zano HH 3013226 20 10091 ays 103 ZK 126 LASOHtOVAL is lt 8 vivos UE MEL GN ZMS 004 feily Figure 12 CDCE421EVM Board Block Schematic 17 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board SCAUO020 March 2007 Submit Documentation Feedback INSTRUMENTS www ti com Schematics and Layout gt gt OPAMP RD C BLOCK C SLP 310 0018 01 Costumer CDCE421 Eval Board CRONOS z 8 5 R114 10k 100k R111 CDCE421_OSC 422 R1212 R120 422 AN NNN 108 R86 100k NP 2 LVPECL TERM C VI DD SDATA Figure 13 CDCE421EVM Board Block Schematic 18 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board SCAU020 March 2007 Submit Documentation Feedback INSTRUMENTS www ti com Schematics and Layout EN_D OPAMP gt gt OPAMP RD D mM 5 i Costumer CDCE421 Eval Board CRONOS SLP 310 0018 01 R110 10k BNNNN LVPECL TERM 2 Figure 14 CDCE421EVM Board Block D Schematic SCAUO020 March 2007 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board 19 Submit Documentation Feedback EVALUATION BOARD KIT IMPORTANT NOTICE Texas Instruments Tl provides the enclosed product s und
9. as an XO or VCXO the crystal should be mounted on either of the two crystal footprints on the board A vertical SMA input connector must also be installed on the provided footprint to be used as the control voltage input for use as a VCXO Block C Block C includes a CDCE41 device in its bare die form packaged within a 5x7 oscillator The oscillator package also includes a fixed frequency crystal with a specified load and range Oscillators with different frequency crystals that contain a CDCE421 device can be obtained through Pletronics Block D The fourth block D includes a socket fitting the oscillator part used in Block C Software Selectable Options The provided EVM software is controlled through a graphical user interface GUI The software allows users to easily send commands to the CDCE421 through the host powered USB interface The EVM includes a slave USB controller that transmits the commands to the single pin programming interface included on the CDCE421 DC power for the USB controller can be provided either from the 5V power pin in the USB cable or by using an external 5V ac adapter plugged into the slot available on the EVM In addition to writing commands to the CDCE421 SRAM while the board is powered software commands can also be stored in either the nonvolatile USB microcontroller memory or the EEPROM included within the CDCE421 This architecture allows users to start the EVM in the desired state without requiring additi
10. ation Feedback D TEXAS INSTRUMENTS www ti com Schematics and Layout D2 1 BLOCK PUR E 3v00 gt oSDATA e QLVPECL TERM N Figure 9 CDCE421EVM Block Switch 8 Schematics and Layout Figure 10 through Figure 14 show the printed circuit board PCB schematics Note Board layouts are not to scale These figures are intended to show how the board is laid out they are not intended to be used for manufacturing CDCE421EVM PCBs 14 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board SCAUO20 March 2007 Submit Documentation Feedback Wy TEXAS INSTRUMENTS www ti com Schematics and Layout Figure 10 CDCE421EVM Board Schematic SCAUO20 March 2007 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board 15 Submit Documentation Feedback INSTRUMENTS www ti com 3 TEXAS Schematics and Layout 10 10 8100 016 415 pa sjonpoJg Yur jeues sexe V 1nONVOS NINVOS 5 v nols3l 1531 x h OXON ZNIX OX ZNIX LNIX WALIO lt v vivas 39 SCAU020 March 2007 Submit Documentation Feedback Figure 11 CDCE421EVM Board Block A Schematic 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board 16 Schematics and Layout 1 ene anyo dWvdo lt lt INSTRUMENTS www ti com 435 TEXAS C
11. ce The evaluation module EVM is designed to quickly demonstrate the electrical performance of the device This fully assembled and factory tested EVM allows complete validation of all device functions for a variety of applications Throughout this document the acronym EVM and the phrases evaluation module and evaluation board are synonymous with the CDCE421EVM Figure 1 illustrates the CDCE421EVM For optimum performance the board is equipped with 500 SMA connectors and well controlled 500 impedance microstrip transmission lines Windows Windows XP are registered trademarks of Microsoft Corporation All other trademarks are the property of their respective owners SCAUO020 March 2007 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board 5 Submit Documentation Feedback D TEXAS INSTRUMENTS www ti com Signal Path and Control Circuitry 2 Signal Path and Control Circuitry The CDCE421 can accept a 27MHz 38 33MHz frequency input from either LVCMOS source up to 3 3V or a crystal in the same frequency range The CDCE421EVM is divided into four blocks The programming section and device power for each sector can be enabled or disabled through individual switches provided for each block For example in order to enable power and programming for Block A the switch must be in the setting shown in Figure 2 The other blocks are enabled and disabled with the respective switches in the same manner The 421 output frequency is
12. cted The crystal SCAUO020 March 2007 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board 9 Submit Documentation Feedback TEXAS INSTRUMENTS www ti com ChronosGUl frequency should be entered here in this format xx xxx specified in MHz Step 3 Output Calculator and Apply PLL Settings The second row of calculations is used to obtain the PLL settings necessary to achieve a particular output frequency provided a given input frequency to CDCE421 The input must be entered in the second row as well as the location provided at the input of the PLL block diagram After the Calculate button is pressed the adjacent drop down menu populates with several choices for the given input The desired output can then be chosen from this list Choosing one output sets the divider settings within the PLL Clicking Apply next to the drop down menu results in writing the PLL settings to the SRAM If LVPECL output is desired click Output Type until the LVPECL option displays This option automatically enables onboard LVPECL termination If LVDS output is desired use Output Type to select the LVDS option Step 4 PLL Bandwidth Select If the user wants to adjust the PLL bandwidth click the Loop Filter block bringing a pop up screen as shown in Figure 6 De Input Calculator Required Input Frequenc Loop filter config Bandwidth KHz Output Calculator Input Frequency f Phase Margn Degrees 80 Loop Filter C1 0 0p
13. e TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are designated by TI as compliant with ISO TS 16949 requirements Buyers acknowledge and agree that if they use any non designated products in automotive applications TI will not be responsible for any failure to meet such requirements Following are URLs where you can obtain information on other Texas Instruments products and application solutions Products Applications Amplifiers amplifier ti com Audio www ti com audio Data Converters dataconverter ti com Automotive www ti com automotive DSP dsp ti com Broadband www ti com broadband Interface interface ti com Digital Control www ti com digitalcontrol Logic logic ti com Military www ti com military Power Mgmt power ti com Optical Networking www ti com opticalnetwork Microcontrollers microcontroller ti com Security www ti com security RFID www ti rfid com Telephony www ti com telephony Low Power www ti com lpw Video amp Imaging www ti com video Wireless Wireless www ti com wireless Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265 Copyright 2007 Texas Instruments Incorporated
14. elected the USB controller enables the onboard LVPECL termination Charge Pump Current Selects appropriate charge pump current See Figure 6 and Figure 7 for recommended configurations Loop Filter Bias Select Bias 0 should be used at all times Bias 1 is a test mode reserved for factory use Loop Filter Selects the loop filter C and R values See Figure 6 and Figure 7 for recommended configurations VCO Calibration When Enable VCO Calibration is selected the CDCE421 uses its internal calibration circuit to lock the PLL loop VCO Calibration Override should not be checked TI uses manual calibration for test modes TI Test Use Setting should be kept at 0000 ibias 100ua Other settings are for TI use only Chronos IC Config Select Use U13 programming socket for rapid programming of Chronos enabled devices Select Use U8 DIE U9 QFN socket if the EVM is using a direct mounted die or a QFN mounted device typical configuration Select Use U12XTAL EVAL if using the optional 6 pin XO mounting pads for Chronos enabled oscillators Chronos Control Select Enable Power to run the entire board from the host USB voltage In this mode the EVM does not need an external 3 3V power supply If this option is not selected then an external 3 3V supply and ground connection must be attached Select Output Enable to provide a clock output When not selected the output goes to a high Z state Push Write C
15. er indemnifies TI from all claims arising from the handling or use of the goods Due to the open construction of the product it is the user s responsibility to take any and all appropriate precautions with regard to electrostatic discharge EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES TI currently deals with a variety of customers for products and therefore our arrangement with the user is not exclusive TI assumes no liability for applications assistance customer product design software performance or infringement of patents or services described herein Please read the User s Guide and specifically the Warnings and Restrictions notice in the User s Guide prior to handling the product This notice contains important safety information about temperatures and voltages For additional information on environmental and or safety programs please contact the TI application engineer or visit www ti com esh No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine process or combination in which such TI products or services might be or are used FCC Warning This evaluation board kit is intended for use for ENGINEERING DEVELOPMENT DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end product fit for general consumer use
16. er the following conditions This evaluation is intended for use for ENGINEERING DEVELOPMENT DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end product fit for general consumer use Persons handling the product s must have electronics training and observe good engineering practice standards As such the goods being provided are not intended to be complete in terms of required design marketing and or manufacturing related protective considerations including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards This evaluation board kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility restricted substances ROHS recycling WEEE FCC CE or UL and therefore may not meet the technical requirements of these directives or other related directives Should this evaluation board kit not meet the specifications indicated in the User s Guide the board kit may be returned within 30 days from the date of delivery for a full refund THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED IMPLIED OR STATUTORY INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE The user assumes all responsibility and liability for proper and safe handling of the goods Further the us
17. f C2 3758 R2 834 v LVPECL Termination EVM Optionts IC Block e USB communication Note Loop filter depends on the prescaler and charge pump settings Advanced Control E Note Click on the indivdual blocks to change the devi Ready Figure 6 Chronos GUI Loop Filter Configuration Pop Up For a clean reference input to the CDCE421 for example from an oscillator or crystal the maximum bandwidth and phase margin setting must be used 400kHz bandwidth and 80 degrees The Phase Frequency Detector PFD charge pump current must be set to its maximum 224uA The PFD charge pump current can be set by clicking on the PDF Charge Pump block presenting a drop down menu with the various charge pump current settings For a dirty reference input to the CDCE421 the minimum bandwidth of 50kHz must be used Additionally to reduce the output jitter for a dirty input the phase margin can also be reduced to near its minimum 30 degrees depending on the integration limits of the jitter that are important for a given application To reduce the output jitter further the charge pump current can be reduced to its minimum 56 depending on the integration limits of the jitter Step 5 Write to CDCE421 EEPROM To write any particular setting to the EEPROM locking or nonlocking the Device EEPROM drop down menu at the top of the screen must be selected This menu contains the items Write settings to EEPROM No lockin
18. g and Write settings to EEPROM Locking Choose the appropriate option after setting the desired PLL configurations to write to the EEPROM in its appropriate mode 10 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board SCAUO20 March 2007 Submit Documentation Feedback 435 TEXAS INSTRUMENTS www ti com ChronosGUI 6 2 Manual PLL Block Selection Advanced Control The advanced control screen helps to set the PLL without having to manually alter the individual blocks within the PLL If a user is familiar with PLL operation one may activate individual control of the PLL blocks by clicking on the Advanced Control button activating the window shown in Figure 7 Untitled _ lolx Fie Edt View Device EEPROM EVM Firmware Help emm Range PreScaler Output Divider Freqout MHz Freqinneeded Chronos EVM control Output divider Fin low MHz Output Enable vco1 2040 2350 MHz qum Tacna 5 L ermanate 1X umet 02 1750 2040 MHz eedbackD 12 3 Loop Filter Bias fiter Driver Select LFBias0 C3 pf R2 pf LVDS Write Chronos C LE Bim eg eros Settings to EEPROM 5 Write Chronos VCO Charge Pump Current
19. hronos settings to RAM to download settings into the CDCE421 on chip volatile SRAM These settings are lost upon device power down Push Write Chronos settings to EEPROM NO LOCKING when ready to store the configuration in the CDCE421 nonvolatile EEPROM The settings are available after device power down The settings can be changed at a later time Push Write Chronos settings to EEPROM LOCKING only if the settings are permanent and final After this selection the EEPROM is locked and cannot be altered at a later time USB Communication A bright red light indicates that USB is not connected or not communicating properly A green light indicates that a proper USB connection exists 12 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board SCAUO20 March 2007 Submit Documentation Feedback Wi INSTRUMENTS www ti com Configuring the Board 7 Configuring the Board The CDCE421EVM can be powered from the USB power supply or from an external source The CDCE421EVM only needs a USB cable attached for programming purposes however for test measurements it is recommended to also use an external 3 3V power supply Test measurements can also be taken with only the USB supplied power Note that because of USB power variance results may degrade It is also possible to program the CDCE421 and then disconnect the USB cable with minor board configuration changes To enable power and programming of any of the four blocks on the CD
20. ith USB Cable Removed After 13 8 Schematics and Layout sec ape Pe 14 Important oem 20 SCAU020 March 2007 Table of Contents 3 Submit Documentation Feedback 4 List of Figures 1 421 Evaluation Board HR Ein Hit 5 2 CDCE421EVM Programming e enn nennen 6 3 Software Installation Screen certo nat run ta ae een 8 4 Installation aaa nn 8 5 TI Chronos Software GU een 9 6 Chronos GUI Loop Filter Configuration I nemen 10 7 Chronos GUI Manual PLL Block Selection 11 8 JP1 Setting for USB Programming eee eee ee ee eee eee 18 9 CDGE421EVM Block SWIICH Off oua rasan Ta 14 10 GDGE421EVM Board ScliemiatiC TE Ta 15 11 CDCE421EVM Board Block A Schematic nun nun nen ann nennen nun nn nn nm enne nnne 16 12 CDCE421EVM Board Block B Schematic nun nn nenn nn nn nn nenne nennen nun nenn ne
21. nnen nennen 17 13 CDCE421EVM Board Block Schematic nen nn nennen nun nenn nenne nun nenn 18 14 CDCE421EVM Board Block D Schematic nun nun nun nn nn nn nen nn nennen nun nenn nenn nennen 19 List of Figures SCAUO20 March 2007 Submit Documentation Feedback wy TEXAS User s Guide INSTRUMENTS SCAU020 March 2007 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board Figure 1 CDCE421EVM Evaluation Board Features Easy to use evaluation module generates low phase noise clocks between 10 9MHz 1 175MHz e Simple device programming host powered USB port Fast configuration through provided software GUI Total board power provided either through USB port or separate 3 3V and ground connections LVCMOS input interface or crystal input Standard 6 pin XO package connection available for CDCE421 enabled XO devices 1 General Description The CDCE421 is a high performance low phase noise clock generator It has two fully integrated low noise liquid crystal LC based voltage controlled oscillators VCOs that operate in the 1 75GHz 2 35GHz range The CDCE421 has an integrated crystal oscillator circuitry that operates in conjunction with an external AT cut crystal to produce a stable frequency reference for the PLL based frequency synthesizer A 3 3V LVCMOS level input can also be used instead of a crystal to provide a PLL frequency referen
22. onal programming at power up Note that the CDCE421 does have a permanent EEPROM lock mode When this mode is selected the embedded EEPROM in the CDCE421 cannot be changed This mode is useful when setting final configurations SCAUO020 March 2007 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board 7 Submit Documentation Feedback 9 INSTRUMENTS www ti com Installing the Software GUI and USB Driver 5 Installing the Software GUI and USB Driver The CDCE421EVM software can be installed on a PC running the Microsoft Windows 2000 operating system or higher including Windows To start software installation run the ChronosSetup msi file available on the CD shipped with the EVM Figure 3 appears Be sure to note the installation folder the USB driver must be installed in the same after setup completes and the USB cable is connected See Figure 4 i Chronos Eval Setup Welcome to Chronos Eval Setup Wizard The Setup Wizard will install Chronos Eval on your computer Click Next to continue or Cancel to exit the Setup Wizard Figure 3 Software Installation Screen Chronos Eval Setup Select Installation Folder This is the Folder where Chronos Eval will be installed To install in this folder click Next To install to a different folder enter it below or click Browse Folder c Program Files Texas Instruments Chronos Note the program file location the USB controller
23. r their products and applications using Tl components To minimize the risks associated with customer products and applications customers should provide adequate design and operating safeguards TI does not warrant or represent that any license either express or implied is granted under any TI patent right copyright mask work right or other TI intellectual property right relating to any combination machine or process in which TI products or services are used Information published by TI regarding third party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual property of the third party or a license from TI under the patents or other intellectual property of TI Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties conditions limitations and notices Reproduction of this information with alteration is an unfair and deceptive business practice TI is not responsible or liable for such altered documentation Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive busines
24. ration 7 3 Testing Configuration from a Saved Configuration with USB Cable Removed After Programming When operating the CDCE421 without the USB programming cable useful in lab settings where a PC is not immediately available at a lab station the CDCE421EVM must be preprogrammed in one of the two configurations discussed above and then reconfigured for external power supply usage Before making these board modifications the CDCE421 settings must be saved with one of the two USB cable attached configurations The Write Chronos Settings to EEPROM NO LOCKING software button must be used to save the CDCE421 settings to its internal EEPROM After the settings are saved the USB cable can be removed Once the cable has been disconnected JP1 should be in the Using External 3 3V Supply position as shown in Figure 8 The EVM is now ready for use without the USB cable connected The CDCE421 will always start from its saved configuration state in this mode If the CDCE421 must be isolated from the microcontroller the switch corresponding to the block in use should be set to OFF for CE_x SDATA_x and LVPECL_TERM_x where x represents the block name see Figure 9 The power line switch for the respective block however should remain on This sequence also allows the user to remove the USB cable without affecting performance while the CDCE421 is powered on SCAUO020 March 2007 10 9MHz 1175MHz Low Phase Noise Clock Evaluation Board 13 Submit Document
25. s practice Tl is not responsible or liable for any such statements TI products are not authorized for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parties have executed an agreement specifically governing such use Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications and acknowledge and agree that they are solely responsible for all legal regulatory and safety related requirements concerning their products and any use of TI products in such safety critical applications notwithstanding any applications related information or support that may be provided by TI Further Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in such safety critical applications TI products are neither designed nor intended for use in military aerospace applications or environments unless the TI products are specifically designated by TI as military grade or enhanced plastic Only products designated by TI as military grade meet military specifications Buyers acknowledge and agree that any such use of TI products which TI has not designated as military grade is Solely at the Buyer s risk and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such us
26. to linear regulators switching transistors pass transistors and current sense resistors These types of devices can be identified using the EVM schematic located in the EVM User s Guide When placing measurement probes near these devices during operation please be aware that these devices may be very warm to the touch Mailing Address Texas Instruments Post Office Box 655303 Dallas Texas 75265 Copyright O 2007 Texas Instruments Incorporated IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries TI reserve the right to make corrections modifications enhancements improvements and other changes to its products and services at any time and to discontinue any product or service without notice Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete All products are sold subject to Tl s terms and conditions of sale supplied at the time of order acknowledgment TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with standard warranty Testing and other quality control techniques are used to the extent deems necessary to support this warranty Except where mandated by government requirements testing of all parameters of each product is not necessarily performed TI assumes no liability for applications assistance or customer product design Customers are responsible fo
Download Pdf Manuals
Related Search