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u-blox LEA-6 series, Hardware Integration Manual

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u-blox LEA-6 series Hardware Integration Manual Download Page 61

LEA-6 / NEO-6 - Hardware Integration Manual 

GPS.G6-HW-09007-A 

Preliminary 

Related documents 

 

 

Page 61 of 62

 

Related documents 

[1]

 

LEA-6 Data Sheet, Docu. No GPS.G6-HW-09004 

[2]

 

NEO-6 Data Sheet, Docu. No GPS.G6-HW-09005 

[3]

 

u-blox 6 Receiver Description including Protocol Specification, Docu. No GPS-SW-09017 

[4]

 

GPS Antenna Application Note, Docu. No GPS-X-08014 

[5]

 

LEA-6R Integration Considerations Application Note, Docu. No GPS-X-10028 

[6]

 

u-blox 6 Firmware Version 6.02 Release Note, Docu. No GPS.G6-SW-10003 

[7]

 

LEA-5 Data Sheet, Docu. No GPS.G5-MS5-07026 

 

For regular updates to u-blox documentation and to receive product change notifications please contact 
our local support. 

Revision history 

 

Revision 

Date 

Name 

Status / Comments 

- 

24/03/2010 

tgri 

Initial release 

A 

20/07/2010 

mdur 

Preliminary; updated 1.6.3 DDC, 1.7.1 RESET_N, 1.7.4 Config Pins, 
2.1.1 Layout, 3.2 Soldering 

 

 

 

 

 

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Summary of Contents for LEA-6 series

Page 1: ...ct easy to integrate stand alone GPS receiver modules combine exceptional GPS performance with highly flexible power design and connectivity options Their compact form factors and SMT pads allow fully...

Page 2: ...FLASH version LEA 6H All FW6 02 LEA 6S All ROM6 02 LEA 6A All ROM6 02 LEA 6T All ROM6 02 LEA 6R All FW DR 1 0 NEO 6G All ROM6 02 NEO 6Q All ROM6 02 NEO 6M All ROM6 02 This document and the use of any...

Page 3: ...ox 6 based GPS receiver modules For navigating this document please note the following This manual has a modular structure It is not necessary to read it from the beginning to the end To help in findi...

Page 4: ...email addresses rather than any personal email address of our staff This makes sure that your request is processed as soon as possible You will find the contact details at the end of the document Help...

Page 5: ...6 14 1 7 I O pins 17 1 7 1 RESET_N 17 1 7 2 EXTINT0 17 1 7 3 AADET_N LEA 6 17 1 7 4 Configuration pins LEA 6S 6A NEO 6 17 2 Design in 18 2 1 Design in checklist 18 2 1 1 Layout design in checklist 18...

Page 6: ...nding metal covers 41 3 2 12 Use of ultrasonic processes 41 3 3 EOS ESD EMI Precautions 41 3 3 1 Abbreviations 41 3 3 2 Electrostatic discharge ESD 41 3 3 3 ESD handling precautions 41 3 3 4 ESD prote...

Page 7: ...1 Migration from LEA 4 to LEA 6 52 B 4 2 Migration from LEA 5 to LEA 6 54 B 5 Migration of NEO modules 54 B 5 1 Migration from NEO 4S to NEO 6 54 B 5 2 Migration from NEO 5 to NEO 6 55 C Interface Bac...

Page 8: ...ser or third parties or that could cause damage to goods 1 2 Architecture LEA 6 and NEO 6 modules consist of two functional parts the RF and the Baseband sections See Figure 1 and Figure 2 for block d...

Page 9: ...charge the internal capacitors in the core domain In certain situations this can result in a significant current draw For low power applications using Power Save and backup modes it is important that...

Page 10: ...ill be achieved when A valid GPS position is fixed Almanac is entirely downloaded Ephemeris for all satellites in view are valid 1 3 2 2 Eco mode In Eco mode u blox 6 receivers use the acquisition eng...

Page 11: ...ions that allow the operation of the embedded processor and associated peripherals to be supervised These System Monitoring functions are output as part of the UBX protocol class MON Please refer to t...

Page 12: ...peed driver impedance of 28 44 Ohms A value of 22 Ohms is recommended R11 Resistor 10k R is recommended for USB self powered setup For bus powered setup R11 can be ignored Table 1 Summary of USB exter...

Page 13: ...ory used by external host see data sheet for exact pin orientation Note that the case shown on Figure 5 is different than the case when EEPROM is present but used by external host CPU as indicated on...

Page 14: ...LEON G100 G200 wireless modules from version LEON G100 G200 05S and above With u blox 6 when reading the DDC internal register at address 0xFF messages transmit buffer the master must not set the read...

Page 15: ...PS receiver to a host master The signal on the pins must meet the conditions specified in the Data Sheet u blox GPS Receiver SPI Master SS_N MISO SCS_N MI VDD MO MOSI SCK SCK VDD Figure 8 Connecting t...

Page 16: ...that the GPS receiver starts up with a known defined configuration since the SPI pins MOSI MISO and SCK are at start up also configuration pins Figure 9 Diagram of SPI Pin Configuration Component Desc...

Page 17: ...ted See chapter 2 5 5 for an implementation example 1 7 4 Configuration pins LEA 6S 6A NEO 6 ROM based modules provide up to 3 pins CFG_COM0 CFG_COM1 CFG_GPS0 for boot time configuration These become...

Page 18: ...sign in checklist Designing in a u blox 6 module is easy especially when based on a u blox reference design Nonetheless it pays to do a quick sanity check of the design This section lists the most imp...

Page 19: ...io then check sections 3 3 6 to 3 3 8 For more information dealing with interference issues see the GPS Antenna Application Note 4 Schematic If required does your schematic allow using different modul...

Page 20: ...o all ground pins of the module Connect the antenna to RF_IN over a matching 50 Ohm micro strip and define the antenna supply V_ANT 6 Choose the required serial communication interface UART USB or DDC...

Page 21: ...ry optional Micro Processor USB 1 SDA2 SPI_MOSI SCL2 SPI_MISO TxD1 RxD1 NC VCC GND VCC_OUT CFG_COM1 NC SPI_SCS2_N TIMEPULSE2 RESET_N V_BCKP Reserved GND GND RF_IN VCC_RF V_ANT NC FWD NC SPI_SCS1_N NC...

Page 22: ...to VCC Leave open if not used V_BCKP 11 I Backup voltage supply It s recommended to connect a backup battery to V_BCKP in order to enable Warm and Hot Start features on the receivers Otherwise connec...

Page 23: ...A 6T TIMEPULSE2 SDA2 SPI_MOSI 1 I O DDC Pins SPI DDC Data Leave open if not used LEA 6R SPI MOSI SCL2 SPI_MISO 2 I O DDC Pins SPI DDC Clock Leave open if not used LEA 6R SPI MISO Reserved 12 I Leave o...

Page 24: ...Power VCC 23 I Supply Voltage Max allowed ripple on VCC 50mVpp GND 10 12 13 24 I Ground Assure a good GND connection to all GND pins of the module preferably with a large ground plane V_BCKP 22 I Bac...

Page 25: ...ut This section provides important information for designing a reliable and sensitive GPS system GPS signals at the surface of the Earth are about 15dB below the thermal noise floor Signal loss at the...

Page 26: ...l 0 6 mm 23 5 mil Figure 17 NEO 6 paste mask The paste mask outline needs to be considered when defining the minimal distance to the next component The exact geometry distances stencil thicknesses and...

Page 27: ...e sensitive component Avoid high temperature drift and air vents near the receiver Non emitting circuits PCB Digital Analog circuits Non emitting circuits Antenna Digital Part RF Part 1 2 3 4 5 6 7 8...

Page 28: ...nection This part of the circuit MUST be kept as far from potential noise sources as possible Make certain that no signal lines cross and that no signal trace vias appear at the PCB surface within the...

Page 29: ...1 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 Wrong better best Figure 21 Recommended micro strip routing to RF pin for exact pin orientation see data sheet Do not route the RF connection under...

Page 30: ...per typically 25 m Figure 23 is an example of a multi layer FR4 board with 18 m ounce cladding and 180 dielectric between layer 1 and 2 Figure 23 Micro strip on a multi layer board Agilent AppCAD Copl...

Page 31: ...the supply voltage is fed to the antenna through the coaxial RF cable Active antennas require a power supply that will contribute to the total GPS system power consumption budget with additional 5 to...

Page 32: ...mplifier Active Antenna RF_IN VCC_RF GND GND 10 Figure 25 Recommended wiring for active antennas for exact pin orientation see data sheet For optimal performance it is important to place the inductor...

Page 33: ...feature helps to reduce power consumption 2 5 4 1 Short circuit protection If a reasonably dimensioned series resistor R_BIAS is placed in front of pin V_ANT a short circuit situation can be detected...

Page 34: ...if required The active antenna supervisor provides the means to check the active antenna for open and short circuits and to shut the antenna supply off if a short circuit is detected The state diagra...

Page 35: ...detection variant A for exact pin orientation see data sheet References Value Tolerance Description Remarks R1 10 5 Resistor min 0 063 W R2 560 5 Resistor R3 100 k 5 Resistor u1 LT6000 Rail to Rail Op...

Page 36: ...00 Ferrite Bead e g Murata BLM18HD601SN1 R1 15 10 Resistor min 0 063 W R2 10 10 Resistor min 0 250 W R3 R4 10 k 10 Resistor min 0 063 W R5 33 k 10 Resistor min 0 063 W T1 T2 PNP Transistor BC856B e g...

Page 37: ...CFG ANT message For further information refer to the u blox 6 Receiver Description including Protocol Specification 3 Similar to the antenna supervisor configuration the status of the antenna supervi...

Page 38: ...ommendations in section 2 4 1 The quality of the solder joints on the connectors half vias should meet the appropriate IPC specification 3 2 2 Reflow soldering A convection type soldering oven is stro...

Page 39: ...oldering The final soldering temperature chosen at the factory depends on additional external factors like choice of soldering paste size thickness and properties of the base board etc Exceeding the m...

Page 40: ...logy SMT devices require wave soldering to solder the THT components Only a single wave soldering process is encouraged for boards populated with u blox 6 modules 3 2 7 Hand soldering Hand soldering i...

Page 41: ...ress damage during production or in the field it is essential to observe strict EOS ESD EMI handling and protection measures To prevent overstress damage at the RF_IN of your receiver never exceed the...

Page 42: ...ring RF connectors and patch antennas to the receiver s RF pin make sure to use an ESD safe soldering iron tip Failure to observe these precautions can result in severe damage to the GPS receiver 3 3...

Page 43: ...low insertion loss and appropriate ESD rating Figure 34 EOS and ESD Precautions 3 3 7 Electromagnetic interference EMI Electromagnetic interference EMI is the addition or coupling of energy released...

Page 44: ...ful placement of the antennas but this isn t sufficient In such applications an additional input filter is needed on the GPS side to block the high energy emitted by the GSM transmitter Examples of th...

Page 45: ...er see Figure 38 The main sources are wireless communication systems such as GSM CDMA WCDMA WiFi BT etc 0 500 1000 1500 2000 GPS input filter characteristics 0 110 0 500 1500 2000 Frequency M Hz GSM 9...

Page 46: ...ced to unbalanced operation Insertion Loss Bandwith and BW over temperatur Electrostatic Sensitive Device ESD MM CTS CER0032A 3 3 6 4 2x4 0x2 0 mm 8kV ESD HBM LNA Avago ALM 1106 ALM 1412 ALM 1712 ALM...

Page 47: ...r each unit The following measurements are done Digital self test Software Download verification of FLASH firmware etc Measurement of voltages and currents Measurement of RF characteristics e g C No F...

Page 48: ...e the power level in a way that the Golden Device would report a C No ratio of 38 40 dBHz 3 Power up the DUT Device Under Test and allow enough time for the acquisition 4 Read the C No value from the...

Page 49: ...procedure Nevertheless there are some points to be considered during the migration Not all of the functionalities available with ANTARIS 4 are supported by u blox 6 These include RTCM UTM B 1 Checklis...

Page 50: ...between the power modes Max Performance mode and Eco mode For more information on u blox6 Power supply specifications and power modes see the LEA 6 Data Sheet 1 and NEO 6 Data Sheet 2 If you use an ac...

Page 51: ...CFG RXM N A Contrary to ANTARIS 4 u blox6 does not need selecting GPS acquisition sensitivity mode Fast Normal High Sens and Auto mode since the acquisition engine is powerful enough to search all sat...

Page 52: ...rs etc Placing a filter or other source of resistance at Vcc can create significantly longer acquisition times B 3 2 Hardware Migration u blox 5 u blox 6 Check the pins RxD1 and EXTINT0 regarding the...

Page 53: ...INT0 NC EXTINT0 NC 28 TIMEPULSE VDDIO level I O TIMEPULSE Output Table 14 Pin out comparison LEA 4H LEA 4P LEA 4T vs LEA 6H LEA 6T Pin LEA 4A LEA 4S LEA 6A LEA 6S Remarks for Migration Pin Name Typica...

Page 54: ...6 See also the migration Table in the u blox 5 Hardware Integration Manual For u blox6 the Input Voltage thresholds on the pins RXD1 and EXTINT0 have changed The Safeboot functionality is inverted com...

Page 55: ...d NC SDA2 NC 19 Reserved NC SCL2 NC 20 TXD1 VDDIO level I O TxD1 Output 21 RXD1 VDDIO level I O RxD1 Input Leave open if not used 22 V_BAT 1 5 3 6V V_BCKP 1 4 3 6V Wider voltage range but needs more c...

Page 56: ...CL depend on VDD See the LEA 6 Data Sheet 1 or NEO 6 Data Sheet 2 for the applicable voltage levels DDC Device A DDC Device B VDD SDA SCL GND Rp Rp SDAin SDAout SCL in SDAout SDAin SDAout SCL in SDAou...

Page 57: ...he receiver assumes the role of a master on the bus and never changes role to slave until the following start up subject to EEPROM presence This process takes place only once at the start up i e the r...

Page 58: ...two data lines These are identified as follows SCS Slave Chip Select control output from master usually active low SCK Serial Clock control output from master MOSI Master Output Slave Input data outpu...

Page 59: ...r protocols In the first variant the microcontroller s designated as slave s behave like a normal peripheral device The second variant allows for several masters and allows each microprocessor the pos...

Page 60: ...d the clock signal from the master synchronizes the data transfer between the master and slave devices Slave devices ignore the SCK signal unless the slave select pin is active low In both the master...

Page 61: ...6R Integration Considerations Application Note Docu No GPS X 10028 6 u blox 6 Firmware Version 6 02 Release Note Docu No GPS G6 SW 10003 7 LEA 5 Data Sheet Docu No GPS G5 MS5 07026 For regular updates...

Page 62: ...74 44 E mail info u blox com Technical Support Phone 41 44 722 74 44 E mail support u blox com Asia Australia Pacific u blox Singapore Pte Ltd Phone 65 6734 3811 E mail info_ap u blox com Support supp...

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