125 Series Wi125 - Digi-Key
Contents
1. Figure 8 Grounding the Wi125 with a Ground Plane CONNOR Wi125 Data Sheet SG170 Page 17 of 20 Rev 02 Date 06 16 10 WINFIELD Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 8 APPLICATION HINTS continued 8 4 Battery Backup The Wi125 has an on board real time clock RTC This is used to store date and time information while the Wi125 is powered down Having a valid date and time speeds the Time To First Fix TTFF allowing the Wi125 to meet its quoted TTFF specification The Wi125 relies on an external power source to power the RTC VBATT when the DIG_3V3 is not present If the user application does not require the warm or hot fix performance or the required information is provided by network assistance there is no need to provide the VBATT signal The VBATT signal must be greater than 2 6V and less than DIG_3V3 0 6V Typically a 3V lithium primary cell or a high capacity supercap will be used The Wi125 has an internal blocking diode so if a supercap or rechargeable battery is used an external charging circuit will be required Visit digikey com 100R ness 1K VBATT o 1K VBATT CR2032 Cell 0 47F Supercap DIG_GND DIG_GND Figure 7 Typical VBATT Supplies CONNOR WINFIELD Wi125 Data Shee2. 19 List of Tables Table 1 Revision History 2 Table 2 Additional Documentation List 3 Table 3 Wi125 Specification 6 Table 4 Absolute Maximum RatingS 7 Table 5 Absolute Maximum RatingS 7 Table 6 Wi125 Signal List 8 Table 7 RF Track amp Gap Widths 17 Revision History of Version 1 0 Visit digikey com Revision Date Released By Note 00 07 20 09 Keith Loiselle New Release of Wi125 Data Sheet 01 04 13 10 Dave Jahr Update to 1PPS timing Accuracy Specification 02 06 16 10 Dave Jahr 125 Series Revised Table 1 Revision History Other Documentation The following additional documentation may be of use in understanding this document Document By Note Wi125 User Manual Connor Winfield Wi125 Dev Kit User Manual Connor Winfield Table 2 Additional Documentation List Wi125 Data Shee
3. 19 8 5 Over Voltage amp Reverse Polarity Protection 2 m 19 8 6 LEDS 19 8 7 Reset Generation 19 8 8 Boot OPTIONS 19 CONNOR WINFIELD Wi125 Data Sheet SG170 Page 2 of20 Rev 02 Date 06 16 10 Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice Figure and Table Contents List of Figures Figure 1 Wi125 Block Diagram 7 Figure 2 Wi125 Form anq Size 8 Figure 3 Wi125 Dimensions 9 Figure 4 Solder Pad Size and Placement 10 Figure 5 RF Tracking Example 17 Figure 6 Grounding the Wi125 with a ground plane 18 Figure 7 Typical VBATT Supplies
4. All Rights Reserved Specifications subject to change without notice 8 APPLICATION HINTS continued The widths of the RF_IN track and the associated gaps are given in the table below Visit digikey com Scenario Track Width 1 1000 Inch Gap Width 1 1000 Inch Without ground plane 37 6 56 8 With ground plane 32 6 43 8 Table 7 RF Track amp Gap Widths Alternatively the user can attach the antenna to the Hirose H FL R SMT using a flying lead fitted with a suitable plug 8 3 Grounding In connecting the Wi125 into a host system good grounding practices should be observed Specifically ground currents from the rest of the system hosting the Wi125 should not pass through the ground connections to the Wi125 This is most easily ensured by using a single point attachment for the ground There must also be a good connection between the RF_GND and the DIG_GND signals While there is not a specific need to put a ground plane under the Wi125 high energy signals should not be tracked under the Wi125 It is however recommended that a ground plane be used under the Wi125 In this case the following would be an example of the pattern that may be used Double via to host system ground at this one point Digital and RF grounds common at this point
5. Storage temperature 40 85 C IOUT Digital Signal Output Current 6 6 mA Table 5 Absolute Maximum Ratings 2 4 Block Diagram ANT_SUPPLY RF_3V3 DIG_1V8 1V8_OUT DIG_3V3 RF Block Regulator Regulator amp Reset Front Control RF_IN End Filter Emulation RF25IC BB25IC comms amp o TRIM EXT_CLK _ Clock IF RTC amp PC Filter My EEPROM NPOR VBATT Figure 1 Wi125 Block Diagram CONNOR WINFIELD Wi125 Data Sheet 5G170 Page 6 of20 Rev 02 Date 06 16 10 Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 3 PHYSICAL CHARACTERISTICS The 125 Series Wi125 is a multi chip module MCM built on an FR4 fiberglass PCB All digital and power connec tions to the Wi125 are via castellations on the 25 x 27 mm PCB The RF connection is via castellations or an RF con nector The general arrangement of the Wi125 is shown in the diagram below Dimensions are in mm inches 1000 Visit digikey com 27 1063 HIROSE H FL CONNECTOR PART NO H FL R SMT TaN 6 ANT_SVPPLY S5 RF_GND DNNN NNNNA Pen 1v8_OUT 33 DIG_1V8 34 DIG_GNO 35 DIG_3V3 36 18 RF_GND EVENT_IN 37 17 RFY_GUT il 1PP5 3B 16 NPOR 21 JTAGSELSRTCK 20 TCK 19 RF_ava 25 984 3 GP1O O PWM_OUT 39 1
6. 0 10 Hz to 30 MHz Wi125 Receiver Type 12 parallel channel x 32 taps up to 32 point FFT Channels taps and FFT can be switched off to minimize power or simulate simpler designs General Processor ARM 966E S on a 0 18 process at up to 120 MHz Note 1 The features listed above may require specific software builds and may not all be available in the initial release 2 Please contact factory for other temperature options Table 3 Wi125 Specification Wi125 Data Sheet SG170 Page 5 of 20 Rev 02 CONNOR Date 06 16 10 WINFIELD Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 2 SPECIFICATION continued 2 2 Recommended Ratings Visit digikey com Symbol Parameter Min Max Units RF_3V3 RF Supply Voltage 3 0 3 6 Volts DIG_3V3 Digital Supply Voltage 3 0 3 6 Volts DIG_1V8 Digital Supply Voltage 1 65 1 95 Volts VBATT Battery Backup Voltage 2 7 3 5 Volts ANT_SUPPLY Antenna Supply Voltage 3 0 12 Volts Table 4 Recommended Maximum Ratings 2 3 Absolute Maximum Ratings Symbol Parameter Min Max Units RF_3V3 RF Supply Voltage 0 3 6 5 Volts DIG_1V8 Digital Supply Voltage 0 3 2 0 Volts DIG_3V3 Digital Supply Voltage 0 3 3 7 Volts VBATT Battery Backup Voltage 0 5 7 0 Volts ANT_SUPPLY Antenna Supply Voltage 15 15 Volts DIG_SIG_IN Any Digital Input Signal 0 3 5 5 Volts RF_IN RF Input 15 15 Volts TSTORE
7. 2111 Comprehensive Drive Aurora lllinois 60505 Phone 630 851 4722 Fax 630 851 5040 www conwin com Bulletin SG170 Page 1 of 20 Revision 02 Date 16 June 2010 125 Series Wi125 CONNOR WINFIELD Visit digikey com TABLE OF CONTENTS Visit digikey com INTRODUCTION 2922 222 nnnn nn nnn nn nnn nn nnn nnn nnn ccnnnnnrnnensa 4 SPECIFICATION 22 20 n nnn n nn nnn nnn nner nn nnn nnn anne nennncancces 6 2 1 Performance 6 2 2 Recommended Ratings 7 2 3 Absolute Maximum Ratings 7 2 4 Block Diagram n nn enna nnn enone nn nnenennnn nen enennnnnnnnneenenennsnens 7 PHYSICAL CHARACTERISTICS 8 3 1 Physical Interface Details 8 3 2 Wi125 DimMensionS 9 3 3 Solder Pad Size and Placement 9 SIGNAL DESCRIPTION 11 4 1 Power SignallS 0n 0n cn
8. 5 NTRST GPID 1 TIME_SYNC 40 14 TD GPIO Z NEXT_INT 41 GPIO 3 FREQ_IN 42 13 TDC 12 TRIM IN 4 1 5 1 6 CLK 7 RED 8 GAN p 4 2 165 3 x x x 2 x x Figure 2 Wi125 Form and Size 3 1 Physical Interface Details The interface to the Wi125 is via 1mm castellations on a 2mm pitch There are 42 connections in all There is also an RF connector for connecting to the GPS antenna The details of the interface connections are given below Pin Function Pin Function Pin Function 1 TX0 15 NTRST 29 N2WDA 2 RX 0 16 NPOR 30 USBP 3 TX 2 17 _RFV_OUT 31 USBN 4 RX 2 EV2_IN 18 RF_GND 32 FREQ_OUT 5 TX 19 RF_3V3 33 1V8_OUT 6 RX 1 20 TCK 34 DIG_1V8 7 EXT CLK 21 JTAGSEL RTCK 35 DIG_GND 8 LED_RED 22 TMS 36 DIG_3V3 9 LED_GRN 23 RF_GND 37 EVENT_IN 10 NRESET 24 RF_IN 38 1PPS 11 BOOTSEL 25 RF_GND 39 GPIO 0 PWM_OUT 12 TRIM 26 ANT_SUPPLY 40 _GPIO 1 TIME_SYNC 13 TDO 27 _ VBATT 41 GPIO 2 NEXT_INT 14 TDI 28 N2WCK 42 GPIO 3 FREQ_IN Note 3 Frequency Output is available on pin 32 FREQ_OUT with custom software only Table 6 Wi125 Signal List CONNOR Wi125 Data Sheet SG170 Page7 of20 Rev 02 Date 06 16 10 WINFIELD Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 3 PHYSICAL CHARACTERISTICS continued er ort 3 2 Wi125 Dimensions The figure below provides the dimensions of th
9. NNOR Wi125 Data Sheet SG170 Page11 of 20 Rev 02 Date 06 16 10 WINFIELD Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 4 SIGNAL DESCRIPTION continued Visit digikey com 4 5 I O Signals TX O Type I O Direction Output Pin 1 The Transmit Signal for UART 0 This is a standard UART output signal The signal return path is DIG_GND TX 1 Type I O Direction Output Pin 5 The Transmit Signal for UART 1 This is a standard UART output signal The signal return path is DIG_GND TX 2 Type I O Direction Output Pin 3 The Transmit Signal for UART 2 This is a standard UART output signal The signal return path is DIG_GND RX O Type I O Direction Input Pin 2 The Receive Signal for UART 0 This is a standard UART input signal The signal return path is DIG_GND RX 1 Type I O Direction Input Pin 6 The Receive Signal for UART 1 This is a standard UART input signal The signal return path is DIG_GND RX 2 EV2_IN Type I O Direction Input Pin 4 This is a Dual Mode Signal Normally this is the receive signal for UART 2 a standard UART receive signal Under software control it can also be used as general purpose I O or to detect events It can be used to detect the timing of the leading edge of the start bit of the incoming data stream The signal return path is DIG_GND FREQ_OUT Type I O Direction Input Output Pin 32 Optional Frequency Output Signal This i
10. TIME_SYNC Type I ODirection Input Output Pin 40 The GPIO 1 TIME_SYNC pin provides a synchronization pulse generated by the on board RTC Custom software versions can also configure this pin for general purpose 1 O or an additional PPS output The signal return path is DIG_GND Note 4 USB is not supported in the current software build CONNOR Wi125 Data Sheet 5G170 Page 13 of 20 Rev 02 Date 06 16 10 WINFIELD Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 4 SIGNAL DESCRIPTION continued Visit digikey com 4 5 I O Signals cont d GPIO 2 NEXT_INT Type I O Direction Input Output Pin 41 The GPIO 2 NEXT_INT output provides an active high status indicator for the Frequency Output available on pin 39 GPIO O0 PWM Custom software versions can also configure this pin for general purpose I O The signal return path is DIG_GND GPIO 3 FREQ_IN Type I O Direction Input Output Pin 42 The GPIO 3 FREQ_IN output provides an active high status 3D fix indicator This indi cator can also be used to determine the validity of the pin 38 1PPS output The signal return path is DIG_GND 5 SPECIAL FEATURES While most of the features on the Wi125 are just a subset of the capabilities of the Wi125 and so are described in the Wi125 Data Sheet and the Wi125 User Manual there are some additional features specific to the Wi125 that require explanation 5 1 User Comma
11. ariable length delay in the validity of the TDO signal The RTCK is a synchro nized version of the TCK signal The Multi ICE uses the RTCK output signal to indicate when the TDO signal is valid The signal return path is DIG_GND NTRST Type Test Direction Input Pin 15 The Test Reset Signal This is the active low JTAG test reset signal The signal return path is DIG_GND 4 4 Control Signals NPOR Type Control Direction Input Output Pin 16 The Power On Reset Signal This active low open collector signal is the master reset for the Wi125 The Wi125 can be held in reset by asserting this signal The signal can be used to reset external circuitry but care must be taken to ensure no DC current is drawn from this signal as the internal pull up resistor value is 100K NRESET Type Control Direction Input Output Pin 10 The System Reset Signal This active low open collector signal is generated by the BB25IC chip in response to the assertion of the NPOR It may also be driven to reset the ARM9 processor in the BB25IC without completely re initializing the chip BOOTSEL Type Control Direction Input Pin 11 The Boot Select Signal The BB25IC has four boot up modes but only two are supported by the Wi125 This signal is sampled when the NPOR is de asserted If the BOOTSEL signal is high or left floating then the Wi125 boots from its on chip FLASH memory If the BOOTSEL signal is pulled low the Wi125 boots from its on chip ROM CO
12. cations reducing the need for high antenna placement The Wi125 is an exceptionally small surface mount package with a highly integrated architecture that requires a minimum of external components allowing easy integration into host systems Key information includes e System Block Diagram e Maximum Ratings e Physical Characteristics Wi125 Dimensions castellation information Solder Pad and placement information e Signal Descriptions e Special Features e Application Information Power supply modes RF connections Grounding Battery Back up Over Voltage and Reverse Polarity LED s Features e 1PPS 10 MHz Phase alignment e Stable Holdover e Holdover Recovery e 1 PPS amp NCO Frequency Output e GPS UTC time scale synchronization to 25 ns RMS e Stable proven design with long term availability and multi year support e 12 channel hardware correlator processor design e OEM SM footprint 25 x 27 mm e Automatic entry into holdover e Loss of lock and entry into holdover indication The specifications in the following sections refer to the standard software builds of the Wi125 The performance and specification of the Wi125 can be modified with the use of customized software builds CONNOR WINFIELD Wi125 Data Sheet SG170 Page 4 of20 Rev 02 Date 06 16 10 Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 2 SPECIFICATION 2 1 Performance Visit digike
13. e positioning of the Wi125 castellations Dimensions are in mm inches 1000 26 42 1040 2 EAB aska 13 19 520 2 ER 1 2 50 HOOOUOU QUE 2 78 7 24 38 C960 80 12 19 O00000 000G e C78 7 OHOL PIN 1 1 39 4 2 03 80 3 ELLS Figure 3 Wi125 Dimensions 3 3 Solder Pad Size and Placement It is recommended that the footprint of the solder pad under each castellation be 2mm x 1mm centered on the nominal centre point of the radius of the castellation The castellations are gold plated and so are lead free Note that if the RF_IN connector is being used there should not be a pad or solder resist under the RF_IN castella tion If the RF_IN castellation is to be used the pad should be shortened by 0 5mm underneath the Wi125 and standard RF design practices must be observed The diagram below shows the placement of the pads under the castellations ewe pee Figure 4 Solder Pad Size and Placement CONNOR WINFIELD Wi125 Data Sheet 5G170 Page 8 of 20 Rev 02 Date 06 16 10 Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 4 SIGNAL DESCRIPTION The signals on the Wi125 are described in the table below Visit digikey com 4 1 Power Signals RF_3V3 Type Power Direction Input Pin 19 The RF Supply Input This 3 3V 10 input supplies the 2 9V LDO regulator in the RF section of
14. e serial interface The signal return path is DIG_GND USBP 4 Type I O Direction Input Output Pin 30 The positive USB Signal The signal return path is DIG_GND USBN Type I O Direction Input Output Pin 31 The negative USB Signal The signal return path is DIG_GND LED_RED Type I O Direction Output Pin 8 This is a Dual Function Signal Normally this signal is used to drive a red LED Standard software builds use this signal to indicate GPS status In special software builds this sig nal can be used as GPIO This signal has a 3 3V CMOS drive A series limiting resistor is required to limit output current to 5mA The signal return path is DIG_GND LED_GRN Type I O Direction Output Pin 9 This is a Dual Function Signal Normally this signal is used to drive a green LED Stan dard software builds use this signal to indicate GPS status In special software builds this signal can be used as GPIO This signal has a 3 3V CMOS drive A series limiting resistor is required to limit output current to 5mA The signal return path is DIG_GND GPIO 0 PWM Type I O Direction Input Output Pin 39 Normally the GPIO 0 PWM output provides a Frequency Output that defaults to 10 MHz and is user configurable from 10 Hz to 30 MHz signal The output is enabled on power up and is steered by the GPS solution Custom software versions can also configure this pin for general I O PWM or EPOCH output The signal return path is DIG_GND GPIO 1
15. he external battery will provide an easy method of measuring the current consumption from VBATT during test 4 2 RF Signals RF_IN Type RF Direction Input Pin 24 The RF Input Signal This attaches to the GPS antenna Standard RF design rules must be used when tracking to this signal This signal has an RF blocked connection to the ANT_SUPPLY signal This is the same signal presented on the RF connector on the Wi125 Only one antenna connection should be made If the RF connector is to be used then there should be no connection even an unconnected pad to this castellation TRIM Type RF Direction Input Pin 12 This signal trims the output frequency of the VCTCXO This signal is normally left open When floating this signal is biased to the control voltage of the VCTCXO Any noise in jected into this signal will severely compromise the performance of the Wi125 This signal should only be used in conjunction with specific application notes EXT_CLK Type RF Direction Input Pin 7 This input is the external clock input This signal is to be used only in special builds of the Wi125 that are not fitted with an internal VCTCXO For the normal build containing the VCTCXO do not connect this input The external clock is a 9 MHz to 26 MHz clipped sinewave input with an amplitude between 1V and 3V peak to peak The return path for this signal is RF_GND 4 3 Emulation Test Signals TDI Type Test Direction Input Pin 14 The Test Data I
16. ly to the Wi125 is high due to long tracks filtering or other causes local decoupling of the supply signals may be necessary Care should be taken to ensure that the maximum supply ripple at the pins of the Wi125 is 50mV peak to peak 8 2 RF Connection The RF connection to the Wi125 can be done in two ways The preferred method is to use standard microstrip design techniques to track from the antenna element to the RF_IN castellation This also allows the systems integrator the option of designing in external connectors suitable for the application The user can easily fit an externally mounted MCX SMA or similar connector provided it is placed adjacent to the RF_IN castellation If the tracking guidelines given below are followed the impedance match will be acceptable The diagram below shows how this could be achieved In this diagram the centre via of the RF connector is presumed to be plated through with a minimal pad top and bottom The PCB material is assumed to be 1 6mm thick FR4 with a dielectric constant of 4 3 Two situations are considered one with no ground plane and one with a ground plane on the bottom of the board underneath the RF connector In both cases there is no inner layer tracking under the RF connector a Cy Top Tracking Ground Plane if used i SMA Connector Figure 7 RF Tracking Example CONNOR WINFIELD Wi125 Data Sheet 5G170 Page 16 of20 Rev 02 Date 06 16 10 Copyright 2010 The Connor Winfield Corp
17. n Signal This is the standard JTAG test data input The signal return path is DIG_GND TDO Type Test Direction Output Pin 13 The Test Data Out Signal This is the standard JTAG test data output The signal return path is DIG_GND TCK Type Test Direction Input Pin 20 The Test Clock Signal This is the standard JTAG test clock input The signal return path is DIG_GND CONNOR WINFIELD Wi125 Data Sheet 5G170 Page 10 of20 Rev 02 Date 06 16 10 Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 4 SIGNAL DESCRIPTION continued 4 3 Power Signals cont d Visit digikey com TMS Type Test Direction Input Pin 22 The Test Mode Select Signal This is the standard JTAG test mode input The signal return path is DIG_GND JTAGSEL RTCK Type Test Direction Input Output Pin 21 This is a Dual Function Signal When the NPOR signal is asserted low this signal is an input and selects the function of the JTAG interface When high JTAG emulation into the embedded ARM9 processor is selected When low the BB25IC chip boundary scan mode is selected The value on this signal is latched when NPOR de asserts goes high When NPOR is de asserted high and the JTAG emulation mode has been latched this signal provides the return clock to the ARM Multi ICE Because the ARM9 functions off a single clock domain the TCK has to be internally synchronized in the ARM9 This can cause a v
18. nds The Wi125 can accept a number of specific user commands for setting receiver parameters such as UART baud rate and NMEA message subset output frequency etc Many of these parameters are stored in Non Volatile Memory NVM so that the settings are retained when the receiver loses power The available commands are defined in detail in the Wi125 User Manual 5 2 Self Survey To optimize timing performance the Wi125 performs a 10 minute survey each time the receiver is powered up and after obtaining a GPS fix When the survey is complete the receiver automatically enters fixed timing mode For applications with specific timing performance requirements it may be necessary to allow the survey to com plete before using the 1PPS and frequency outputs The status of the survey can be determined by querying the receiver dynamics setting as described in the Wi125 User Manual 5 3 Wi125 Embedded Identification The hardware version number is hard coded onto the Wi125 firmware also contains a version number allowing for easy identification of the hardware and software version in embedded applications CONNOR WINFIELD Wi125 Data Sheet SG170 Page 14 of 20 Rev 02 Date 06 16 10 Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 6 TAPE AND REEL SPECIFICATIONS Visit digikey com 1 Measured from center line of sprocket hole to center line of pocket Il Cumulative tolerance of 10 sp
19. nnenwnennnennennnennnnnnnenannnacanaensaennenns 11 4 2 RF Signals 0nenennnnnnenwnennne nnn nnncnnnnnnannacanacanacnnannanans 12 4 3 Emulation Test Signals 0 nnsnonnennscnacnnacenacnnncnnccns 12 4 4 Control Signals 0 00 enwnennnennnnnnnnnnnnnaenncanncanannannacans 13 4 5 I O Signals 13 SPECIAL FEATURES 222 2222 n nn nnn nnnn 14m 15 5 1 User Command 0n 22nennnonnn nnn nomenon nnn 15 5 2 Self Survey 15 5 3 Wi125 Embedded Identification 15 TAPE AND REEL SPECIFICATIONS 16 SOLDER PROFILE 2 2 22 22 n noon n nnn nnn ncnnnn ncn nnnccenncces 16 APPLICATION HINTS 2 222222 nnn nnnnnn nnn cnnnn ence cnnnan cc ncsnn 17 8 1 Power Supply 17 8 2 RE Connection 02 0nnnonnnnnne name nena nananana 17 8 3 Grounding 18 8 4 Battery Backup
20. rocket holes is 0 20 Ill Measured from center line of sprocket hole to center line of pocket IV Other material available ALL DIMENSIONS IN MILLIMETERS UNLESS OTHERWISE STATED General Tolerance 0 2 Drawing not to Scale Figure 5 Tape and Reel 7 SOLDER PROFILE 300 250 Peak Temp o o SS 245 255 C for 15 sec Typ 221 C 200 o Reflow Zone 2 150 30 90 sec Min Max z Soaking Zone 60 90 sec Typ 2 min Max 100 50 4 Ramp Slope not to exceed 3 C sec 0 r 0 50 100 150 200 250 300 350 Time sec Figure 6 Solder Profile CONNOR Wi125 Data Sheet 5G170 Page15 of 20 Rev 02 Date 06 16 10 WINFIELD Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 8 APPLICATION HINTS The following are a list of application hints that may help in implementing system based on the Wi125 Visit digikey com 8 1 Power Supply The power supply requirements of the Wi125 can all be provided from a single 3 3V supply To simplify system integration on board regulators provide the correct voltage levels for the RF and oscillator 2 9V or 3 0V and low voltage digital core 1 8V In power sensitive applications it is recommended that the DIG_1V8 supply is provided from a high efficiency external 1 8V source e g switch mode power supply rather than the on board linear regula tor If the source impedance of the power supp
21. s NOT the same signal as pin 39 This signal is turned off by default This is a complex signal which under software can provide any of either an NCO generated output frequency a PWM signal a GPS aligned EROCH pulse or general purpose I O signal The signal return path is DIG_GND 1PPS Type I O Direction Input Output Pin 38 The 1 Pulse Per Second Signal This is normally a 1 pulse aligned with GPS time but can under software control also provide general purpose I O or an additional event input The pulse width of the 1PPS is software selectable with a default of 100us The signal return path is DIG_GND EVENT_IN Type I O Direction Input Output Pin 37 The Event Input Signal with internal connection to Pin 39 GPIO 1 Time Sync allows phase measurement of the Frequency Output The signal return path is DIG_GND CONNOR WINFIELD Wi125 Data Sheet SG170 Page 12 of20 Rev 02 Date 06 16 10 Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 4 SIGNAL DESCRIPTION continued Visit digikey com 4 5 I O Signals cont d N2WCK Type I O Direction Input Output Pin 28 The NavSync 2 Wire Clock Signal This is the open collector 12C compatible Clock Signal for the 2 wire serial interface The signal return path is DIG_GND N2WDA Type I O Direction Input Output Pin 29 The NavSync 2 Wire Data Signal This is the open collector 12C compatible Data Signal for the 2 wir
22. t 5G170 Page 18 of 20 Rev 02 Date 06 16 10 Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice Visit digikey com CONNOR Wi125 Data Sheet SG170 Page 19 of20 Rev 02 Date 06 16 10 WINFIELD Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 125 Series Wi125 Series CONNOR WINFIELD Visit digikey com 2111 Comprehensive Drive Aurora Illinois 60505 Phone 630 851 4722 Fax 630 851 5040 www conwin com
23. t SG170 Page 3 of20 Rev 02 Date 06 16 10 Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice CONNOR WINFIELD 1 INTRODUCTION Visit digikey com The 125 Series Wi125 is a small OEM surface mount GPS module specifically designed for use in synchronization and timing in WiMax applications This compact module has an on board programmable NCO oscillator that outputs a synthesized frequency up to 30 MHz that is steered by a GPS receiver The self survey mode of operation allows the receiver to enter a position hold mode allowing accurate timing to be continued with only one satellite being tracked Additionally the 125 Series Wi125 has phase alignment of 1 PPS 10 MHz with a very stable holdover The 1 PPS 10 MHz outputs maintain phase alignment with holdover being base only on the local oscillator dismissing spurious GPS measurements during reacquisition When the receiver regains GPS lock after a period of holdover the 1PPS and 10 MHz outputs maintain phase alignment and are offset in frequency at the maximum rate of 100 ppb until the 1 PPS aligns with that of the GPS solution This slow recovery from holdover allows for uninterrupted operation of the WiMax base station The Wi125 has a highly accurate output frequency which can achieve full PRC MTIE performance Additionally it can track satellites and provide GPS synchronization in weak signal areas including indoor appli
24. the Wi125 It is important that this supply is well filtered with no more that 50mV peak to peak noise with respect to RF_GND RF_GND Type Power Direction Input Output Pins 18 23 25 The RF Input Ground This is the return path for the RF_3V3 supply and the ground for the antenna feed The RF_GND must be tied to the DIG_GND externally to the Wi125 RFV_OUT Type Power Direction Output Pin 17 The output from the LDO regulator that is powered by the RF_3V3 signal This supplies the power to the RF subsystem of the Wi125 This may also be used to power external RF components but care must be taken not to inject noise onto this signal No more than an additional 30mA may be taken from this signal by external circuitry ANT_SUPPLY Type Power Direction Input Pin 26 The Antenna Supply Voltage This may be used to supply power to the RF_IN signal for use by an active antenna The maximum voltage should not exceed 15V and the current should be limited to 50mA DIG_3V3 Type Power Direction Input Pin 36 The Digital Supply Input This 3 3V 10 input supplies the I O ring of the BB25IC chip and the LDO regulator in the digital section of the Wi125 It is important that this supply is well filtered with no more that 50mV peak to peak noise with respect to DIG_GND DIG_1V8 Type Power Direction Input Pin 34 The 1 8V 5 digital core supply for the BB25IC This is normally connected directly to the 1V8_OUT signal However if an e
25. xternal 1 8V 5 is available a lower overall system power consumption may be achieved by using an external supply 1V8_ OUT Type Power Direction Output Pin 33 The 1 8V output from the LDO regulator that is powered by the DIG_3V3 signal Normally this is connected to the DIG_1V8 signal This may also be used to power external logic but care must be taken not to inject noise onto this signal No more than an additional 50mA may be taken from this signal by external logic DIG_GND Type Power Direction Input Output Pin 35 The Digital Ground This is the return path for the DIG_3V3 supply and the ground reference for all the digital I O The DIG_GND must be tied to the RF_GND externally to the Wi125 CONNOR Wi125 Data Sheet SG170 Page9of20 Aev 02 Date 06 16 10 WINFIELD Copyright 2010 The Connor Winfield Corp All Rights Reserved Specifications subject to change without notice 4 SIGNAL DESCRIPTION continued Visit digikey com 4 1 Power Signals cont d VBATT Type Power Direction Input Output Pin 27 The Battery Backup Supply The Wi125 has an on board Real Time Clock RTC This is powered from the VBATT signal A supply of typically 3v greater than 2 5V and less than DIG_3V3 should be applied to this signal This signal can be left floating if not required The input has a blocking diode and so rechargeable batteries will need an external charg ing circuit Typically a 1K resister in series with this signal and t
26. y com Physical Module dimensions 25mm D x 27mm W x 4 2mm H Supply voltages 3V3 Digital 1 0 3V3 RF 1V8 Core option 3V Standby Battery Operating Temp 30 C to 85 C Storage Temp 40 C to 85 C 2 Humidity 5 to 95 non condensing Max Velocity Altitude 515ms 18 000m Max Acceleration Jerk 4g 1gs sustained for less than 5 seconds Sensitivity Acquisition w network assist 185dBW Tracking 186dBW Acquisition Stand Alone 173dBW Acquisition Hot Start with network assist Outdoor lt 2s Time Indoor 178dBW lt 5s Stand Alone Outdoor Cold lt 45s Warm lt 38s Hot lt 5s Reacquisition lt 0 5s 90 confidence Accuracy Position Outdoor Indoor lt 5m rms lt 50m rms Velocity lt 0 05ms Latency lt 200ms Raw Measurement Accuracy Pseudorange lt 0 3m rms Carrier phase lt 5mm rms Tracking Code and carrier coherent Power 1 fix per second 0 6W typically Coma Mode Current 10mA RF38V3 DIG 3V3 Standby Current VBATT 1 5yA Interfaces Serial 3 UART ports CMOS levels Multi function O 1PPS and Frequency Output available on GPIO 0 Event Counter Timer Input Up to 4 x GPIO multi function 2 x LED Status Drive lC External Clock on special build Protocols Network Assist NMEA 0183 Proprietary ASCII and binary message formats 1pps Timing Output 10nS rms accuracy lt 5nS resolution User selectable pulse width Event Input 30nS rms accuracy lt 10nS resolution Frequency Output GPIO
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