GPS & GLONASS module GNS 3301 Datasheet preliminary specification 1 INTRODUCTION The GNS3301 module supports GPS and GLONASS simultaneously. With a very small form factor of just 10.0 by 9.3 by 2.0 mm, GNS3301 is an ideal GNSS solution for many applications. GNS 3301 is based on the advanced new generation MediaTek MT3333 GNSS chip. First Fixes after just a few seconds are achieved with the help of A-GPS using EPOTM (Extended Prediction Orbit) and the EASYTM "self generated orbit prediction" algorithm. EASYTM (Embedded Assist System) does not require any resources and does not need any information from the network. Due to its capability to use GLONASS and GPS at the same time, GNS3301 benefits from the higher availability of satellites in critical environments. The navigation performance and accuracy is further improved by using the correction data from SBAS (WAAS, EGNOS, GAGAN, MSAS), QZSS or DGPS(RTCM). The low power design makes it easy to implement this module in power sensitive, battery supplied applications. Very low power requirements (typ 66mW@ 3.3V) and internal voltage regulator makes it easy to run the module with various power supplies and allows direct connection to LiIon batteries. Further power savings re possible with AlwaysLocateTM power management feature. It adaptively adjusts power consumption depending on the environment and motion conditions, in order to achive a balance between fix rate, power consumption and position accuracy. In professional timing applications the outstanding high accuracy PPS (pulse per second) hardware pin is used for synchronization to GPS second. Typical accuracy is 10ns RMS jitter. GNS3301 offers the industry's highest level of navigation sensitivity down to -165dBm. It has superior dynamic performance at high velocity and provides effective protection against interference signals using MTAICTM ( Multi-tone active interference canceller). Up to 12 independent channel interference continuous wave jammers can be eliminated or reduced. The embedded logger function LOCUS with a 16-hrs on chip memory makes this GNSS module a complete track logger for many applications. (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 1 GPS & GLONASS module GNS 3301 Datasheet preliminary specification Features * * * * * * * * * * * * * * GLONASS and GPS simultaneously 99 acquisition-/ 33 tracking channels Ultra high tracking/navigation sensitivity: -165dBm Extremely fast TTFF at low signal level QZSS, SBAS (WAAS,EGNOS,MSAS,GAGAN) or DGPS(RTCM) correction support A-GPS by EPO "Extended Prediction Orbit" TM enables 7/14days prediction 12 Multitone Active Interference Canceller (MTAIC) for GPS-in-band jammer rejection EASY TM : Self generated orbit prediction support AlwaysLocate TM : Intelligent Algorithm for power saving Embedded logger function High accuracy 1PPS output NMEA-0183 or binary protocol High update rate (up to 10/s) GPS+GLONASS Consumption current(@3.3V): Acquisition: 28mA typical Tracking: 20mA typical * Low backup current consumption 15uA, typical * SMD type , stamp type adaptor availble * Small form factor: 10x9.3x2.0 mm Applications Navigation o In-vehicle Navigation equipment o Dynamic Navigation o Portable ("nomadic") devices o Netbooks, tablet PCs and mobile phones Timing o Precision timing via GPS Location based applications o GPS Logger o GPS Tracker o Security devices o Camera equipment o Geofencing (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 2 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 2 INDEX 1 INTRODUCTION ----------------------------------------------------------------------------------------- 1 2 INDEX --------------------------------------------------------------------------------------------------- 3 3 FUNCTIONAL DESCRIPTION ---------------------------------------------------------------------------- 4 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 Block diagram --------------------------------------------------------------------------------------------------------------4 System description ---------------------------------------------------------------------------------------------------------4 GPS and GLONASS simultaneous operation ------------------------------------------------------------------------------5 Power Management Features ----------------------------------------------------------------------------------------------5 Logger function -------------------------------------------------------------------------------------------------------------7 Active interference cancellation (MTAIC) ---------------------------------------------------------------------------------8 AGPS with EPOTM data ------------------------------------------------------------------------------------------------------9 EASYTM self generated prediction data feature -------------------------------------------------------------------------- 10 Pulse Per Second (PPS) -------------------------------------------------------------------------------------------------- 10 SBAS (Satellite Based Augmentation) support ------------------------------------------------------------------------- 11 DGPS (Differential GPS) support ---------------------------------------------------------------------------------------- 11 GPS almanac and ephemeris data--------------------------------------------------------------------------------------- 11 Real time clock (RTC) ---------------------------------------------------------------------------------------------------- 11 UART interface ------------------------------------------------------------------------------------------------------------ 11 Module default settings -------------------------------------------------------------------------------------------------- 12 4.1 Typical System overview------------------------------------------------------------------------------------------------- 13 5.1 GNSS characteristics ----------------------------------------------------------------------------------------------------- 14 6.1 6.2 General-------------------------------------------------------------------------------------------------------------------- 15 GPS and GLONASS antenna --------------------------------------------------------------------------------------------- 15 7.1 7.2 7.3 Absolute Maximum Ratings ---------------------------------------------------------------------------------------------- 16 Recommended Operating Conditions ----------------------------------------------------------------------------------- 16 GPS/GLONASS input characteristics ------------------------------------------------------------------------------------ 16 8.1 8.2 Pin configuration --------------------------------------------------------------------------------------------------------- 17 Pin assignment ----------------------------------------------------------------------------------------------------------- 18 9.1 9.2 NMEA output sentences for GPS and GLONASS ------------------------------------------------------------------------ 19 NMEA command interface------------------------------------------------------------------------------------------------ 20 4 TYPICAL APPLICATION BLOCK DIAGRAM ------------------------------------------------------------ 13 5 GNSS characteristics ---------------------------------------------------------------------------------- 14 6 DESIGN GUIDELINES --------------------------------------------------------------------------------- 15 7 ELECTRICAL SPECIFICATION ------------------------------------------------------------------------- 16 8 DEVICE PINOUT DIAGRAM --------------------------------------------------------------------------- 17 9 NMEA DATA interface --------------------------------------------------------------------------------- 19 10 11 12 13 14 15 16 17 18 19 20 21 PHYSICAL DIMENSIONS ----------------------------------------------------------------------------RECOMMENDED PAD LAYOUT ----------------------------------------------------------------------MATERIAL INFORMATION --------------------------------------------------------------------------RECOMMENDED SOLDERING REFLOW PROFILE --------------------------------------------------PACKAGE INFORMATION ---------------------------------------------------------------------------TAPE&REEL INFORMATION -------------------------------------------------------------------------REEL INFORMATION --------------------------------------------------------------------------------ORDERING INFORMATION -------------------------------------------------------------------------ENVIRONMENTAL INFORMATION ------------------------------------------------------------------MOISTURE SENSITIVITY ---------------------------------------------------------------------------DOCUMENT REVISION HISTORY -------------------------------------------------------------------RELATED DOCUMENTS ------------------------------------------------------------------------------ (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 21 22 23 23 24 24 25 26 26 27 27 27 3 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 3 FUNCTIONAL DESCRIPTION 3.1 Block diagram 13 1PPS 8 3D-Fix RF In 5 11 RXDB SAW filter 10 TXDA 9 RXDA 6 Wakeup VCC 16 GPS/ GLONASS chip 32.768kHz crystal VBackup 15 RESET 3 26.0MHz TCXO GND 4,E1,E2 3.2 System description The GNS3301 core is a high performance, low power GPS and GLONASS receiver that includes an integrated RF frontend. The receiver can process two GNSS systems simultaneously, which improves the availability of usable satellites in critical reception scenarios. Due to high input sensitivity it can work directly with a passive antenna. GNS3301 is a complete GNSS engine, including: - Full GPS and GLONASS processing without any host processing requirements Standard NMEA message output A powerful command and control interface All clock sources integrated on module RF frontend for direct connection of passive or active antennas Complete integrated logger function Interfaces for DGPS, PPS, Fix Status Indicator (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 4 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 3.3 GPS and GLONASS simultaneous operation GNS3301 supports tracking of the GPS and the GLONASS satellite system at one time. This feature enhances the overall performance significantly. Increased availability of satellites Increased spatial distribution allows better geometrical conditions Reduced Horizontal (HDOP) and Vertical Dilution of Precision (VDOP) factors In GPS-only operation, a minimum of 3 SVs is needed to determine a 2D position fix solution. When using both systems, 5 SVs are needed to determine the four unknowns and one more SV to calculate the GPS/GLONASS time offset. Using a combined receiver, users have an access to potentially 48 or more satellites. This high number of satellites can overcome the typical problems of restricted visibility of the sky, such as in urban canyons or indoor scenarios. 3.4 Power Management Features Power management schemes implemented for any GNSS system requires an optimally tuned performance for both accuracy of the position fixes and the average power consumed for best user experience. GNS3301 architecture achieves these both aspects by providing flexibility and design choices for the system integration, based on wide range of use cases and by leveraging on the proven silicon methodologies. Also GNS3301 provides position, velocity and time measurements without any host loading. This, coupled with the optional built-in power management options, reduces the overall system power budget. Selectable Power management features: In Standby mode RF frontend and internal MPU are switched to deep sleep state. Power consumption is reduced to 0.6 mW (200A).This state can be entered by sending the NMEA command: $PMTK161,0*28<CR><LF>. Leaving standby mode and resuming to normal operation will be managed by sending any byte to the module. (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 5 GPS & GLONASS module GNS 3301 Datasheet preliminary specification Backup mode can be entered by sending NMEA command: $PMTK225,4*2F<CR><LF>. The GPS/GLONASS core will shut down autonomously to backup state, Vcc supply can now be switched off by an external power supply switch. Periodic mode describes a power mode, which will autonomously power on/off the module in programmable time slots with reduced fix rate. Periodic mode is useful during stationary operation or if position fixes are just needed from time to time. Since power consumption in GPS off times is nearly zero, the power consumption in periodic mode can be estimated by Ptracking * (ton/(ton+toff)). Periodic mode is controlled with NMEA command $PTMK225. See document NMEA_Interface_manual_MTK_V.. for programming details. AlwaysLocateTM feature provides an optimized overall GPS system power consumption in tracking mode under open sky conditions. Always Locate is an intelligent control of periodic mode. Depending on the environment and motion conditions, GNS3301 can adjust the on/off time to achieve balance of positioning accuracy and power consumption. The best power saving will be made under good reception in stationary mode. Critical reception conditions and dynamic movements will need full activity of the GNSS engine which causes nominal power requirements (22mA typ in tracking mode). (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 6 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 3.5 Logger function GNS3301 provides an autonomous logger function that automatically stores position information in an internal 128kB flash memory. A complete tracking unit can be realized without any external CPU or memory. The parameters for logging are programmable via the NMEA command interface. The following parameter can be set to optimize logging time: - logger rate The commands for logger include: - start logging - stop logging - erase memory - readout memory please refer to the NMEA_Interface_manual_MTK_V.. for details. Logger data rate Logger data memory 1/32000 Internal Logger Function 1 1/s 128 Logger capacity Flash memory, allows ~8k of "basic" data sets kBytes ~8000 positions Logger firmware options (on request) The logger is configured to record the "Basic" content by default. Other content setting can be ordered as firmware options. The following options can be statically defined by firmware build. Please note that firmware options are bound to MOQ. Logger content options Name Record size Basic Racing Search Saving All 16 20 19 13 23 Content UTC O O O O O fixtype O O O O Lat O O O O O Lon O O O O O Alt O O O speed heading O O O O O hdop satNo O O O O Checksum O O O O O (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 7 GPS & GLONASS module GNS 3301 Datasheet preliminary specification Logger control and event options Name Logging mode Interval setting Distance setting options AL FixOnly Normal 1..32,000 s 1..50,000 m Speed setting 1..100 m/s Memory option Stop overlap description Automatic logging Logging when fix is available default x x The interval for logging samples Threshold condition. A log sample is taken when the position is changed by x meters Threshold condition. A log sample is taken when the set speed is measured. Logging stops when memory is full Logging continues from beginning when memory is full 5 disabled disabled x 3.6 Active interference cancellation (MTAIC) Because different wireless technologies like Wi-Fi, GSM/GPRS, 3G/4G, Bluetooth are integrated into portable systems, the harmonic of RF signals may influence the GPS reception. The multi-tone active interference canceller can reject external RF interference which come from other active components on the main board, thus improving the performance of GPS reception. GNS3301 can cancel up to 12 independent continuous wave (CW) channels having signal levels of up to -80dBm. The functionality is enabled by default and increases power consumption by about 1mA. (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 8 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 3.7 AGPS with EPOTM data AGPS (assisted GPS) allows to shorten TTFF (TimeToFirstFix) by injecting ephemeris data from an external source into the module's memory. With the help of these data, the module does not need to acquire satellite positions by receiving the data from the satellites. Depending on time and position information that is still available in the module memory, the TTFF can be reduced to just a few seconds. The GNS AGPS service is based on a short term predicted data service. The predicted data will be fully processed by the GPS engine, the host must load the data from the web and transfer them over the UART to the module: 1. Check GNS3301 module EPO data for validity by comparing the time. (time parameters for existing 3301 data can be retrieved through a NMEA command) 2. Connect to web server through network connection (GPRS, WLAN, LAN,..) 3. Download file. There are just two files, covering all GPS satellites. The first file (MTK7d.EPO) is for 7 days (53kB), the other is 106Kbytes for 14 days (MTK14d.EPO) 4. "Parse" file, using software example. This is quite easy, there must be added some header bytes and a checksum and a control counter. GNS offers software support on this. 5. Download to GNS3301 module. please refer to the NMEA_Interface_manual_MTK_V.. for details If the host has low memory available, there's no need to save the whole file. The steps 3..5 can be done frame by frame needing less than 2kBytes of buffer memory. Code samples and support for several platforms are available from GNS (in preparation) Thanks to the predicted system, download data stay valid for up to 14 days. Therefore, users can initiate the download everytime and benefit from using (W)LAN instead of using expensive GSM. File size will be ~50kBytes for a one week prediction data set. AGPS characteristics System File size for data download Maximum prediction time TTFF TTFF 7 53 14 1 15 kB days sec sec 6hrs predicted data 1 week prediction data Time and last position available Last position available (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 9 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 3.8 EASYTM self generated prediction data feature GNS3301 includes an internal prediction system, that allows to sample satellite orbit data during operation and use that data to speed up TTFF on later starts.The prediction time frame is up to three days forward. Although this prediction feature does not provide the very short TTFF that is achieved using AGPS, it can help to find a fix solution faster and in weak signal condition scenario. Prediction data will be kept in memory as long as VBACKUP is present. This option is activated by default. Note: The EASY functionality is only supported, if "VBACKUP" pin is conntected and the NMEA update rate is 1Hz. 3.9 Pulse Per Second (PPS) GNS3301 provides a Pulse Per Second (PPS) hardware output pin for timing purposes. After calculation of a 3D position fix (default setting), the PPS signal is accurately aligned to the GPS second boundaries. The pulse generated is approximately 100 milliseconds in duration and the repetition rate is 1 second. On request PPS output can activated on a 2D- fix or after power-up of the module, providing a time accuracy decreased PPS signal. T2 T1 T1 = 100ms T2 = 1sec GNS3301 module provides an exceptionally low RMS jitter of typical 10 nanoseconds. (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 10 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 1PPS pulse duration 1PPS time jitter - PPS characteristics based upon a 3D-fix 100 msec 1PPS rise and fall time 10 nsec RMS 5 nsec Pulse rising edge deviation from expected pulse time, measured with full 3D fix 10%..90%, load is 10k||5pF 3.10 SBAS (Satellite Based Augmentation) support GNS3301 supports Satellite Based Augmentation for improvement of the navigation precision. Correction data is sent from geostationary satellites to the GPS receiver. GNS3301 supports European, US, and Asian augmentation systems (EGNOS, WAAS, QZSS, GAGAN, MSAS) to enable precision improvements in nearly every region of the world. SBAS is active by default and will automatically track the available SBAS satellites. It can be disabled by NMEA command. See document NMEA_Interface_manual_MTK_V.. for details. 3.11 DGPS (Differential GPS) support GNS3301 accepts DGPS input in RTCM format. DGPS provides precision position fixes down to centimetres and is used in professional applications like agriculture. The second UART (UART_B) of the module is used to feed the data in. DGPS is deactivated by default. For configuration of the UART port, some NMEA commands must be implemented. See NMEA_Interface_manual_MTK_V.. document for details. Note : Since SBAS and DGPS both do (different) corrections on the fix position solution, they cannot be used at the same time! SBAS / DGPS usage is programmed through the NMEA Interface. 3.12 GPS almanac and ephemeris data For quick re-acquisition of the GPS after off-times, the GPS engine should have access to almanac and ephemeris data. This data is permanently stored inside GNS3301 module, even if all power supplies have been removed. When the GPS is powered-up again, the data will be used to allow a quick re-acquisition, as soon as a coarse time information is available. Time will be available immediately, when RTC is kept running. 3.13 Real time clock (RTC) GNS3301 has a real time clock with 32,768Hz crystal onboard. As long as VBACKUP is connected to a power source, the real time clock and the module memory can be kept alive at very low power consumption of just 7uA. The RTC will track the current time and enable the module to start from sleep states with very fast time to first Fix (TTFF). 3.14 UART interface GNS3301 core and I/O sections work at 3.3V nominal. Absolute Maximum Ratings should not be exceeded. Should the GNS3301 be interfaced to a host with I/O at higher/lower levels, level shifters should be used. UART baud rate is 9600baud by default. The baud rate can be modified to higher rates by a NMEA software command. See document NMEA_Interface_manual_MTK_V.. for details. (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 11 GPS & GLONASS module GNS 3301 Datasheet preliminary specification GPS UART Default Settings Parameter Value Baud rate Data length Stop bit Parity 9600 8 bits 1 None 3.15 Module default settings The GNS3301 module comes with default settings, which are persistently programmed. Whenever power is removed from the module (both Vcc and VBACKUP), the settings will be reset to the values shown in the following table. (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 12 GPS & GLONASS module GNS 3301 Datasheet preliminary specification Default settings Setting Default value UART setting Fix frequency (update rate) NMEA sentences NMEA rate Self survey prediction mode: EASYTM Active interference cancellation:MTAIC DGPS option Datum PPS pulse output length Logging parameters 9600,8,N,1 1/sec $GPRMC,$GNGSA,$GPGSV,$GLGSV,$GPVTG,$GPGGA Once a second: RMC,GSA,VTG every 5 sec :GSV sentences enabled enabled SBAS enabled WGS 84 100ms cyclic / Content Basic / Interval 15 sec On request, other options can be selected as preprogrammed (persistent default) options. Please contact the GNS support for your project requirements. Note : Customized options are solely available for fixed order lots. 4 TYPICAL APPLICATION BLOCK DIAGRAM 4.1 Typical System overview 3.3V Power Management VCC V Backup GPS Antenna Mobile device GNS3301 UART RX UART TX Host Processor MMI (keys, display) (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 13 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 5 GNSS characteristics 5.1 GNSS characteristics Parameter Min Typ Max Unit Note general Frequency 1575.42 1598.0625~ 1609.3125 MHz GPS L1 MHz GLONASS L1 SV Numbers DGPS AGPS Output data frequency Navigation&tracking sensitivity Acquisition sensitivity TTFF hotstart TTFF autonomous cold start Number of channels tracking Number of acquisition channels Dimension Weight 1/10 1 -165 -148 <1 34 33 99 10 -167 10x9.3x2.0 0.41 Power consumption GPS/GLONASS ACTIVE (acquisition) GPS/GLONASS ACTIVE (tracking) Backup current @ 3V 1/sec dBm dBm sec sec mm3 g 28 mA 20 mA 15 A GPS #1~32 GLONASS #65~96 GALILEO #201~253* SBAS[QZSS,WAAS,EGNOS, MSAS,GAGAN], RTCM Internal processing of predicted orbit data. Service available via ftp. 6hrs prediction interval Configurable autonomous All SVs @-130dBm All SVs @-130dBm Tolerance is 0.2 mm NMEA frequency = 1/sec*,SBAS enabled, MTAIC enabled NMEA frequency = 1/sec*, SBAS enabled, MTAIC enabled *note: further power savings are possible using AlwaysLocate or periodical modes. Actual possible savings depend on use cases. Accuracy Position error CEP50 Position error CEP50 Velocity error velocity error Operation altitude Operation velocity Operation acceleration - 3 2.5 0.1 0.05 - - - ITAR limits 18,000 515 4 m m m/s m/s Without aid Using (SBAS) Without aid Using (SBAS) m m/s G (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 14 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 6 DESIGN GUIDELINES 6.1 General Although GNS3301 GPS&GLONASS module provides best performance at low power consumption, special care should be taken to provide clean signal and clean power supplies. A multi layer carrier board with solid power- and ground planes is recommended. Power lines should be blocked near to the module with low ESR capacitors. Radiated noise from neighbour components may also reduce the performance of the module.Special care must be taken when designing the RF input tracks and antenna connection. 6.2 GPS and GLONASS antenna GNS3301 contains all input circuitry needed to connect a passive antenna directly. A special GNS & GLONASS antenna that covers both frequencies must be chosen. If there is a long wire between GNS3301 RF input and antenna, there should be an LNA (on the antenna side) to compensate for cable losses ("active" antenna). More information about connecting and implementing a GNSS antenna to an application PCB, please refer to GPS Antenna Design Guide.pdf. (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 15 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 7 ELECTRICAL SPECIFICATION 7.1 Absolute Maximum Ratings Parameter Supply voltage range: Vcc Backup voltage: VBACKUP Input voltage to analog pins Input voltage to all other pins Operating ambient temperature range Storage temperature range Value Unit -0.5 to 4.3 -0.5 to 4.3 -0.5 to 3.3 -0.5 to Vcc -40 to +85 -40 to +85 V V V V C C 7.2 Recommended Operating Conditions Parameter Min Typ Max Unit Vcc 2.8 3.3 4.3 V VBACKUP 2.8 3.3 4.3 V High level output voltage VOH 0.8 * Vcc Vcc V 0 0.2*VDD V High-level input voltage VIH Low-level input voltage VIL 0.80* Vcc 0 Vcc 0.35* Vcc V V Operating temperature -40 85 C Low level output voltage VOL Note supply voltage Backup voltage for RTC and memory retention, must be available during normal operation Full specified sensitivity 7.3 GPS/GLONASS input characteristics Parameter Maximum input level Input return loss Min Typ 0 -6.5 Max Unit Note dBm dB (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 16 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 8 DEVICE PINOUT DIAGRAM 8.1 Pin configuration (TOP view) (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 17 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 8.2 Pin assignment Pin 1 2 3 Name NC NC RESET I/O I Description & Note Not conected Not conected System reset pin An external reset applied to this pin overrides all other internal controls. RESET# is an active low signal. Pulling this pin low for at least 20 s causes a system reset. 4 RF_GND A RF Ground 5 RF_IN A RF input 6 WAKEUP I Wakeup input 7 8 NC 3D_FIX O Not conected 3D-Fix Indicator Ground connection of antenna should be connected at this pin. connection forGNSS antenna. Supports passive antenna. TBD The 3D_FIX is assigned as a fix flag output. If not used, keep floating. Before 2D Fix The pin will continuously toggle with 0.5 Hz. output one second high-level and one-second low-level signal After 2D or 3D Fix The pin will continuously output low-level signal This pin may not connected to high-level at power-on sequence. 9 RXA I Serial Data Input A for NMEA command input (TTL) 10 TXA O Serial Data Output A for NMEA output (TTL) 11 RXB (RTCM in) I Serial Data Input B 12 13 NC 1PPS O Not conected 1PPS Time Mark Output 14 15 NC VBACKUP P Not conected Backup power input for RTC & navigation data keep 16 VCC P Main DC power input E1 E2 GND GND P P Ground Ground This is the UART-A receiver of the module. It is used to receive commands from system. UART A is also used for firmware update This is the UART-A transmitter of the module. It outputs GPS information for application. UART A is also used for firmware update This is the UART-B receiver of the module. It is used to receive RTCM data from system This pin provides one pulse-per-second output from the module and synchronizes to GPS time. Keep floating if not used. This connects to the backup power of the GPS module. Power source (such as battery) connected to this pin will help the GPS chipset in keeping its internal RTC running when the main power source is turned off. The voltage should be kept between 2.8V~4.3V, Typical 3.3V. current draw ~15A If VBACKUP power was not reserved, the GPS receiver will perform a lengthy cold start every time it is powered-on because previous satellite information is not retained and needs to be re-transmitted. This pin must be connected for normal operation. The main DC power supply for the module. The voltage should be kept between from 2.8V to 4.3V. The ripple must be limited under 50mVpp (Typical: 3.3V). (1) I = INPUT; O = OUTPUT; I/O = BIDIRECTIONAL; P = POWER PIN; ANA = ANALOG PIN. (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 18 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 9 NMEA DATA interface GNS3301 provides NMEA 4.0 (National Marine Electronics Association) 0183 compatible data. A set of proprietary NMEA commands are available to send control messages to the module. These commands are described in a separate document: NMEA_Interface_manual_MTK_V.. . For standard operation, no commands are needed; the module will start outputting NMEA sentences after power supply has been attached. GNS3301 will always start communication output with 9600 bit per second. If non standard options are needed (f.e. other baud rate , other NMEA sequence) they can be programmed from host controller during runtime. Important note : options set by using NMEA command interface are not persistent! They will be lost when power is removed. A backup supply at VBACKUP will be sufficient to keep them. 9.1 NMEA output sentences for GPS and GLONASS NMEA output sentences Type content RMC GGA GLL GSA VTG GSV Common sentences Recommended Minimum Navigation Information Fix Data, Time, Position and fix related data for a GPS receiver Geographic Position - Latitude/Longitude GLONASS DOP and active satellites Track made good and Ground speed Satellites in view NMEA output sentences indentifier, related to its GNSS system: NMEA output identifier System GPS GPS+GLONASS GGA GPGGA GPGGA GSA GPGSA GNGSA GSV GPGSV GPGSV GLGSV RMC GPRMC GPRMC1 or GNRMC VTG GPVTG GPVTG Note1: Before 3D fix RMC output is GPRMC, after 3D fix it changes to GNRMC. (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 19 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 9.2 NMEA command interface GNS3301 NMEA command interface allows to control settings and the extended functions. The command interface specification is available in an extra document: NMEA_Interface_manual_MTK_V.. . Two groups of commands are available: Setting commands do modify the behavior of the module. Note : modified settings will be valid as long as the module is powered through Vcc or V BACKUP. (f.e. : setting of a new baud rate). After removing Vcc and VBACKUP, all settings are reset to their default values. Action commands will perform the specified action one time after the command has been received. (f.e. : request for cold start) Commands are always started with $PTMK, directly followed by the command number 000..999. Each command must be terminated by *<chksum>and a <CR><LF>. The checksum calculation is simple, just XOR all the bytes between the $ and the * (not including the delimiters themselves). Then use the hexadecimal ASCII format. (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 20 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 10 PHYSICAL DIMENSIONS TOP VIEW all units in mm, tolerance is 0.2mm 9.3 4.65 3.725 1.25 16 pads 0.85*0.90 2 pads 2.25*2.25 1.2 2.1 5.0 4.1 1.25=pad grid 0.625 1.25 10 (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 21 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 11 RECOMMENDED PAD LAYOUT TOP VIEW 16 pads 0.95*1.55 10.0 3.95 5.0 4.275 1.25 all units in mm 2 pads 2.85*2.65 1.25=pad grid 0.625 1.25 Note: For prototyping, GNS3301 is available on a stamp design adaptor board. Recommended mainboard pad layout will fit for both. (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 22 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 12 MATERIAL INFORMATION Complies to ROHS standard ROHS documentations are available on request Contact surface: gold over nickel 13 RECOMMENDED SOLDERING REFLOW PROFILE T[C] 300 250C max 250C for 10 sec max 230C for 40 sec max 200 160C 190C 120 sec reflow solder 100 100 200 t[sec] Notes: 1. GNS3301 should be soldered in upright soldering position. In case of head-over soldering, please prevent shielding / GNS3301 Module from falling down. 2. Do never exceed maximum peak temperature 3. Reflow cycles allowed : 1 time 4. Do not solder with Pb-Sn or other solder containing lead (Pb) 5. This device is not applicable for flow solder processing 6. This device is not applicable for solder iron process (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 23 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 14 PACKAGE INFORMATION The GNS3301 are placed on a tray for quantities below 100 pieces. The trays will be stacked and packed together.The trays are placed inside an antistatic bag. 15 TAPE&REEL INFORMATION Tape information: (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 24 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 16 REEL INFORMATION : Number of devices: 2000pcs/reel (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 25 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 17 ORDERING INFORMATION Ordering information Type GNS3301 Part# 4037735105164 laser marking GNS 3301 14 04 3.20_32 128245 Description Type datecode FW version serial# GNS3301 GPS&GLONASS GNSS module 18 ENVIRONMENTAL INFORMATION This product is free of environmental hazardous substances and complies with 2002/95/EC. (RoHS directive). (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 26 GPS & GLONASS module GNS 3301 Datasheet preliminary specification 19 MOISTURE SENSITIVITY This device must be prebaked before being put to reflow solder process. Disregarding may cause destructive effects like chip cracking, which leaves the device defective ! Shelf life 6 months , sealed Possible prebake recommendations 12 hrs @ 60C Floor life (time from prebake to solder process) <72 hrs 20 DOCUMENT REVISION HISTORY V0.0 V0.1 V1.0 V1.1 V1.2 March 17 2014 May 22 2014 Sep 16 2014 Oct 6 2014 Nov 14 2014 M.Reiff P.Skaliks P.Skaliks P.Skaliks P.Skaliks initial preliminary preliminary Added logger information added logger info, pad size Corrected current consumption 21 RELATED DOCUMENTS title Description / file Available from GPS Antenna Connection Design Guide Design Guide to implement an GPS antenna to an application PCB www.forum.gns-gmbh.com NMEA_Interface_manual_MTK_V.. Detailed description of NMEA protocol GNS3301 StarterKit user manual User manual for the GNS3301 receiver based evaluation kit www.forum.gns-gmbh.com www.gns-gmbh.com www.forum.gns-gmbh.com www.gns-gmbh.com GNS GMBH 2014 THE INFORMATION IN THIS DOCUMENTATION DOES NOT FORM ANY QUOTATION OR CONTRACT. TECHNICAL DATA ARE DUE TO BE CHANGED WITHOUT NOTICE. NO LIABILITY WILL BE ACCEPTED BY THE PUBLISHER FOR ANY CONSEQUENCE OF THIS DOCUMENT'S USE. REPRODUCTION IN WHOLE OR IN PART IS PROHIBITED WITHOUT THE PRIOR WRITTEN CONSENT OF THE COPYRIGHT OWNER (c) GNS-GmbH 2014 V 1.2, Nov 14th 2014 27