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TRF2020 Frequency Synthesizer
APPLICATION BRIEF: SWRA012
Wireless Communications Business Unit
Digital Signal Processing Solutions January 1998
IMPORTANT NOTICE
Texas Instruments (TI) reserves right make changes products discontinue semiconductor product service without notice, advises customers obtain latest version relevant information verify, before placing orders, that information being relied current. warrants performance semiconductor products related software specifications applicable time sale accordance with TI's standard warranty. Testing other quality control techniques utilized extent deems necessary support this warranty. Specific testing parameters each device necessarily performed, except those mandated government requirements. Certain application using semiconductor products involve potential risks death, personal injury, severe property environmental damage ("Critical Applications"). SEMICONDUCTOR PRODUCTS DESIGNED, INTENDED, AUTHORIZED, WARRANTED SUITABLE LIFE-SUPPORT APPLICATIONS, DEVICES SYSTEMS OTHER CRITICAL APPLICATIONS. Inclusion products such applications understood fully risk customer. products such applications requires written approval appropriate officer. Questions concerning potential risk applications should directed through local sales office. order minimize risks associated with customer's applications, adequate design operating safeguards should provided customer minimize inherent procedural hazards. assumes liability applications assistance, customer product design, software performance, infringement patents services described herein. does warrant represent that license, either express implied, granted under patent right, copyright, mask work right, other intellectual property right covering relating combination, machine, process which such semiconductor products services might used.
Copyright 1998, Texas Instruments Incorporated
TRADEMARKS
trademark Texas Instruments Incorporated. Other brands names property their respective owners.
CONTACT INFORMATION
TELEPHONE SUPPORT LINE email
(972) 644-5580 (972) 480-7800 (972) 480-7872 sc-infomaster@ti.com
Contents
Abstract. Product Support Advantage Extends Beyond Every Other Major Wireless System Block. Related Documentation World Wide Web. Email Introduction. Evaluation Board 2.1. Voltage Regulators 2.2. External Power 2.3. Serial Interface. 2.4. External Reference Software Driver 3.1. Program Screen. 3.1.1. Main Loop Section 3.1.2. Auxiliary-1 Loop Section 3.1.3. Auxiliary-2 Loop Section 3.1.4. Device Section. 3.1.5. Editing parameters. Evaluation Board Disclaimer
Figures
Figure TRF2020 Functional Block Diagram. Figure TRF2020 Evaluation Board Mechanical Outline Figure TRF2020 Evaluation Board Schematic.
Tables
Table Evaluation Board Part List
TRF2020 Frequency Synthesizer
Abstract
This document briefly describes TRF2020 evaluation board associated software. combination evaluation board software provides means fully exercise TRF2020 device using common bench test equipment.
TRF2020 Frequency Synthesizer
SWRA012
Product Support
Advantage Extends Beyond Every Other Major Wireless System Block
INGL CHIP ANAL
Receiver Receiver TRF1xxx TRF1xxx Power Power TRF7xxx, TRF7xxx, TRF8xxx TRF8xxx
Audio Audio Interface Interface
TMS320C54X TMS320C54X Core Core
TSC6000 ASIC BACKPLANE
Interface Interface
Synthesizer Synthesizer TRF2xxx TRF2xxx
User Display User Display Keyboard Keyboard Card Card
Modulator Modulator TRF3xxx TRF3xxx
Amps Amps Switches Switches Regulators Regulators
ARM7TDMIE ARM7TDMIE (C470) (C470) Microcontroller Microcontroller
Speaker Speaker
Microphone Microphone
INGL CHIP DIGIT
MGMT
Digital Baseband TI's single-chip Digital Baseband Platform, combines high-performance core processors digital signal processor tailored digital wireless applications microcontroller designed specifically low-power embedded systems. customizable platform helps wireless digital telephone manufacturers lower component counts, save board space, reduce power consumption, introduce features, save development costs achieve faster time market, same time giving them flexibility performance support standard worldwide. Analog Baseband analog baseband components provide Mixed-signal bridge between real world analog signals digital signal processors, enabling technology digital wireless industry. Using seamless architecture wireless communications technology, matches baseband interfaces, radio frequency power management digital signal processing engines create complete Solutions digital wireless systems. Power Management provides power management solutions with integration levels designed meet needs range wireless applications. From discrete LDOs voltage supervisors complete power supplies baseband section, power management solutions play important role increasing wireless battery life, time-to-market system functionality.
more information visit Wireless Communications site
TRF2020 Frequency Synthesizer
SWRA012
Related Documentation
following list specifies product names, part numbers, literature numbers corresponding documentation.
Synthesizer Global System Mobile (GSM) Cellular
Phones, Literature number SLWS020B.
World Wide
World Wide site www.ti.com contains most date product information, revisions, additions. Users registering with TI&ME build custom information pages receive product updates automatically email.
technical issues clarification switching products, please send detailed email sc-infomaster@ti.com. Questions receive prompt attention usually answered within business day.
TRF2020 Frequency Synthesizer
SWRA012
Introduction
TRF2020 evaluation board comprised multi-layer printed circuit board. following included assessment this device:
TRF2020 Functional Block Diagram TRF2020 Evaluation Board Mechanical Outline Evaluation Board Schematic Evaluation Board Part List
voltage regulators, external power, serial interface, external reference explained detail ensure functionality TRF2020 evaluation board. based software driver supplied with evaluation board. Once program executed program screen divided into five main sections:
Main Loop Auxiliary-1 Loop Auxiliary-2 Loop Device Editing Parameters
Common coaxial multi-conductor connectors allow different types external test equipment used with TRF2020 evaluation board such following:
Personal Computer similar with parallel printer port Linear, single output power supply stable signal source reference clock input Spectrum analyzer.
TRF2020 Frequency Synthesizer
SWRA012
Evaluation Board
TRF2020 evaluation board comprises multi-layer printed circuit board, TRF2020 device, main channel auxiliary channel VCOs, opto-isolated serial interface, voltage regulation, connectors, necessary peripheral discrete components. main channel circuit layout supports Vari-L VCO190-U series similar. auxiliary channel circuit layouts support Vari-L VCO190-S series similar. Figure describes TRF2020 functional block related input/output pins device. Figure reveals TRF2020 evaluation board mechanical outline Figure details TRF2020 evaluation board schematic.
Figure TRF2020 Functional Block Diagram
RF_IN Prescaler 5-bit Counter 11-bit Counter
Phase Detector
Charge-Pump
Control Logic
Speedup Counter
Lock Detect AUX1_IN 3-bit Counter 11-bit Counter
Control Logic
Phase Detector
Charge-Pump
PDA1
AUX2_IN Prescaler 3-bit Counter
Speedup Counter
11-bit Counter
Current Reference
Control Logic Phase Detector PDA2
Charge-Pump
Main Reference Select Aux-1 Reference Select Aux-2 Reference Select
Speedup Counter
STROBE Address Decoder Word-3
Reference counter Power Enable Lock Detect Select Test Mode AUX-2 Synthesizer Reference Postscaler Select Auxiliary Current Ratio AUX-1 Synthesizeer Auxiliary Speed-up Main Current Ratio Main Synthesizer
REF_IN
11-bit Reference Counter
Word-2
Word-1
Word-0
22-bit Shift Register
2-bit
DATA CLOCK
TRF2020 Frequency Synthesizer
SWRA012
Figure TRF2020 Evaluation Board Mechanical Outline
view
scaled
POWER
AUX1
CLOCK PARALLEL PORT DATA
AUX1
TCXO
STROBE LOCK
TRF2020
VDDA
VDDA
AUX2
MAIN
AUX2
MAIN OUTPUT
TRF2020 Frequency Synthesizer
SWRA012
Figure TRF2020 Evaluation Board Schematic
TEXAS INSTRUMENTS INCORPORATED
APPROVALS DRAWN DATE
SCHEMATIC DIAGRAM,
TRF2020 DEMO BOARD,
SIZE DWG. REV.
STOVALL
CHECKED
01/09/98 01/09/98
NGUYEN
ISSUED
SCALE: NONE
TRF2020
Trf2020.sch
SHEET
1998 08:52:47
SIZE
DWG.
REV.
SCALE: NONE
TRF2020
Trf2020.sch
SHEET
1998 12:52:44
TRF2020 Frequency Synthesizer
SWRA012
Table Evaluation Board Part List
DESIGNATOR 2,3,4, 8,46 18,20, 27,28,29,34 31,32,33 VALUE 4700 1000 49.9 12.0 SIZE 3.2x1.6 3.2x1.6 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08
.25" SQUARE
MANU TA010TCM475KAR TA025TCM105KAR GRM39X7R Series GRM39X7R Series GRM39X7R Series GRM39X7R Series GRM39X7R Series USED GRM39X7R Series GRM39X7R Series GRM39X7R Series GRM39X7R Series GRM39X7R Series GRM39X7R Series GRM39X7R Series GRM39X7R Series GRM39X7R Series ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3EKF49R9 ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3GSYJ Series ERJ-3GSYJ Series 2050
MANUFACTURER VENKEL VENKEL muRATA muRATA muRATA muRATA muRATA muRATA muRATA muRATA muRATA muRATA muRATA muRATA muRATA
0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08 0603 1.6x.08
PANASONIC PANASONIC BOURNS PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC PANASONIC TEXAS INSTRUMENTS
TRF2020 Frequency Synthesizer
SWRA012
Evaluation Board Part List (cont.)
DATA, VDDA, VDD, LOCK, POWER, CLOCK, GND, STROBE MVCO 1091 AUX1_VCO AUX2_VCO TCXO 16.8 730C-04 730C-04 SO-8 4N28S MOC8030S LM317LBD 747238-4 142-0701-831 TP-105-01 Series MOTOROLA MOTOROLA NATIONAL SEMICONDUCTOR JOHNSON COMPONENTS CORPORATION VARI-L COMPANY VARI-L COMPANY VARI-L COMPANY Toyocom
VCO190-U VCO190-S VCO190-S TCO-980 Series
TRF2020 Frequency Synthesizer
SWRA012
2.1. Voltage Regulators
on-board regulators provide independent, linear voltage regulation TRF2020, Main VCO, Auxiliary VCOs, serial interface opto-couplers. Regulators (VDDA) (VDD) adjustable using variable resistors respectively. (VOSC1), (VOSC2) (OPTO) adjusted changing combination resistor pairs R3/R7, R8/R13 R37/R38. Tantalum capacitors used enhance ripple noise rejection regulators. voltage regulators factory follows: VDDA VOSC1 VOSC2 VOPTO
2.2. External Power
External power connected evaluation board test points SUPPLY GND. recommended that linear power supply between +7Vdc +9Vdc used external power.
2.3. Serial Interface
DB25M connector provided connection standard parallel port using 25-conductor cable. parallel port used emulate synchronous serial data interface consisting CLOCK, DATA, STROBE. LOCK signal back parallel port indicate synthesizer loop lock status TRF2020. three serial interface signals LOCK signal opto-isolated from parallel port. this manner, TRF2020 device operated supply voltage that different than standard voltage level parallel port. serial interface signals routed DB25M connector follows:
CLOCK DATA STROBE LOCK
TRF2020 Frequency Synthesizer
SWRA012
2.4. External Reference
factory installed TCXO (Temperature Compensated Crystal Oscillator) removed external reference signal source connected (REF_IN) operation reference frequencies other than which TCXO operates. Typically, phase noise, stable, synthesized signal generator such HP8665 similar would used external reference. typical applications, 13.00 signal suitable. 16.8MHz TCXO been installed.
TRF2020 Frequency Synthesizer
SWRA012
Software Driver
based software driver supplied with evaluation board. software intended MS-DOS environment. special memory required software. files contained provided disk: TRF2020.EXE INIT.CFG. Both these files should placed same directory hard disk program executed from disk provided. execute program from provided disk, simply type following
(Enter)
TRF2020
(Enter)
program executes from TRF2020.EXE file. INIT.CFG file read program setup program parameters. INIT.CFG file changed suit your needs; Save File description.
3.1. Program Screen
program screen divided into five main sections: Main Loop, Auxiliary Loop Auxiliary Loop Device Editing Parameters. Main Loop section displays pertinent parameters concerning main synthesizer. Auxiliary Loop sections display pertinent parameters concerning auxiliary synthesizers. Device section displays pertinent parameters concerning device enables, modes, reference frequency. bottom lines display suggests appropriate keys actions take based user inputs
3.1.1. Main Loop Section
main loop section displays current main synthesizer loop parameters. parameters displayed main loop section modified except Phase Detector Freq, which informative only. Phase Detector Freq parameters calculated from reference frequency (Refrnc Freq) reference counter (Refrnc Count parameters Device section.
TRF2020 Frequency Synthesizer
SWRA012
3.1.1.01. Frequency
main Frequency parameter actually TRF2020 device parameter, used cause program automatically find solution, possible, NM1-NM2 based entered frequency parameter others. correct reference frequency (Refrnc Freq), reference count should entered before using Frequency parameter calculate channel solution.
3.1.1.02. Speedup Time
field selects duration speedup mode main synthesizer. duration speedup mode determined follows:
Duration
Reference frequency
where reference frequency typically AMPS.
3.1.1.03. Current Ratio
field selects desired main synthesizer speed-up/normal mode current ratio. choices are:
mA/0.25 mA), mA/0.5 mA), mA/1 mA), mA/2 mA).
3.1.1.04. Enable Loop
field enables/disables main synthesizer follows:
enabled, disabled.
3.1.1.05. NM1-2
fields programmed manually valid number. These fields also automatically updated when Frequency field used enter valid main synthesizer channel frequency.
TRF2020 Frequency Synthesizer
SWRA012
3.1.1.06. Reference Post Select
field selects main synthesizer reference postscaler select follows:
Reference/1, Reference/2, Reference/4, Reference/8.
3.1.2. Auxiliary-1 Loop Section
auxiliary-1 loop section displays current auxiliary-1 loop parameters. parameters displayed auxiliary-1 loop section modified except Phase Detector Freq. This parameter calculated from reference frequency (Refrnc Freq) reference counter (Refrnc Count parameters Device section.
3.1.2.01. Frequency
auxiliary-1 Frequency parameter actually TRF2020 device parameter used cause program automatically find solution, possible, NM1-2 based entered frequency parameter others. correct reference frequency (Refrnc Freq) reference count should entered before using Frequency parameter calculate channel solution.
3.1.2.02. Speedup Time
field selects duration speedup mode both auxiliary-1 auxiliary-2 synthesizers. duration speedup mode determined follows:
Duration
Reference frequency
where reference frequency typically 200kHz 30kHz AMPS.
TRF2020 Frequency Synthesizer
SWRA012
3.1.2.03. Current Ratio
field selects desired speed-up/normal mode current ratio both auxiliary-1 auxiliary-2 synthesizers. choices are:
mA/0.25 mA), mA/0.5 mA), mA/1 mA), mA/2 mA).
3.1.2.04. Enable Loop
field enables/disables auxiliary-1 synthesizer follows:
enabled, disabled.
3.1.2.05. NM1-2
fields programmed manually valid number. These fields also automatically updated when Frequency field used enter valid auxiliary-1 synthesizer channel frequency.
3.1.2.06. Reference Post Select
field selects main synthesizer reference postscaler select follows:
Reference/1, Reference/2, Reference/4, Reference/8.
3.1.3. Auxiliary-2 Loop Section
auxiliary-2 loop section displays current auxiliary-2 loop parameters. parameters displayed auxiliary-2 loop section modified except Phase Detector Freq. This parameter calculated from reference frequency (Refrnc Freq) reference counter (Refrnc Count parameters Device section.
TRF2020 Frequency Synthesizer
SWRA012
3.1.3.01. Frequency
auxiliary-2 Frequency parameter actually TRF2020 device parameter used cause program automatically find solution, possible, NM1-2 based entered frequency parameter others. correct reference frequency (Refrnc Freq) reference count (NR) should entered before using Frequency parameter calculate channel solution.
3.1.3.02. Speedup Time
3.1.2.02 section
3.1.3.03. Current Ratio
3.1.2.03 section
3.1.3.04. Enable Loop
field enables/disables auxiliary-2 synthesizer follows:
enabled, disabled.
3.1.3.01. NM1-2
fields programmed manually valid number. These fields also automatically updated when Frequency field used enter valid auxiliary-2 synthesizer channel frequency.
3.1.3.01. Reference Post Select
field selects main synthesizer reference postscaler follows:
Reference/1, Reference/2, Reference/4, Reference/8.
3.1.4. Device Section
device section displays current device parameters. parameters displayed device section modified except Synthesizer Status which read-back from Lock terminal TRF2020 device.
TRF2020 Frequency Synthesizer
SWRA012
3.1.4.01. Lock Detect
lock detect field selects function lock detect circuitry follows:
Main, Aux-1, Aux-2, AND-ed.
3.1.4.02. Device Test
device test field reserved evaluation should normally remain zero. When this field zero, LOCK terminal operating normally. Otherwise, LOCK terminal connected internal nodes TRF2020.
3.1.4.03. Reference Frequency (Refrnc Freq)
external reference frequency installed TCXO frequency used with evaluation board should entered this location order that other parameters such phase detector reference frequency properly calculated displayed.
3.1.4.04. Reference Count
field selects division ratio reference frequency counter.
3.1.4.05. Synthesizer Status
Synthesizer Status read-back only field that reflects current status LOCK terminal.
3.1.5. Editing parameters
edit program parameters displayed, user first selects appropriate function (described below) select section display such Main Loop section. arrow Tabulation (TAB) keys used move cursor parameter edited. Once cursor located proper location, press Enter Return) select parameter. Next, enter value press Enter again. Once parameters within particular section display have been edited desired, press Escape (ESC) return main menu. example, edit Post Select parameter Main Loop section from main menu, following keystrokes performed:
mnop
TRF2020 Frequency Synthesizer
SWRA012
select Main Loop section move right column move down right column move down right column select Post Select field enter desired data such complete field edit leave Main Loop section return main menu
Enter
Data
Enter
3.1.5.01. Function Keys
Function keys used select sections display editing purposes perform program function follows:
Edit Main Selects Main Loop section display editing. Edit Aux-1 Selects Auxiliary-1 Loop section display editing. Edit Aux-2 Selects Auxiliary-2 Loop section display editing. Edit Device Selects Device section display editing. View Used view current multi-word bitmap. Select Port Used select parallel port. This function "looks" BIOS find parallel ports. Follow directions select particular port more than found. Load File Used load configuration file reset program parameters user specified condition. This function will look entered file same disk same directory from which program executing. existing, allowable name used. INIT.CFG file also loaded using this function restore original program configuration.
TRF2020 Frequency Synthesizer
SWRA012
Save File Used save configuration file containing current program parameters user-specified file. This function will write program parameters specified file name same disk same directory from which program executing. allowable name used. INIT.CFG file also re-written using this function change boot program configuration. F10: Send Device Used program TRF2020 device. When selected, current bitmap displayed user enters letter word sent TRF2020. default sequence order sent TRF2020 simply pressing Enter without first selecting letter.
3.1.5.02. Quitting Program
CTL-Q: Quit Control (Ctrl) depressed held while pressed exit program return DOS.
TRF2020 Frequency Synthesizer
SWRA012
Evaluation Board Disclaimer
Please note that enclosed evaluation boards experimental Printed Circuit Boards therefore only intended device evaluation. would like draw your attention fact that these boards have been processed through more Texas Instruments' external subcontractors have been production qualified. Device parameters measured, using these boards, representative final datasheet final production version. Texas Instruments does represent guarantee that final version will made available after device evaluation.
EVALUATION BOARDS SUPPLIED WITHOUT WARRANTY KIND, EXPRESSED, IMPLIED STATUTORY, INCLUDING LIMITED IMPLIED WARRANTY MERCHANTABILITY FITNESS PARTICULAR PURPOSE. TEXAS INSTRUMENTS ACCEPTS LIABILITY WHATSOEVER ARISING RESULT THESE BOARDS.
TRF2020 Frequency Synthesizer
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