RF8009 - DigChip
Contents
1. OSID Receiver Software ID Once at Power Up Reset OBIT Built in Test Results ACK No OFSH Command Flash Upload ACK No Table 5 Binary Input Messages Binary Description Message Navigation Initialization DGPS Configuration Navigation Operational Configuration Navigation Validity Configuration Navigation Platform Configuration Cold Start Configuration Elevation Mask Angle Configuration User Datum Definition Command Almanac Upload Command Ephemeris Upload Satellite Heal Masking Configuration Command Reset Command Flash Upload Input Output Port Configuration Message Protocol Configuration Command Built in Test Rev A0 030723 14 9 RF8009 Preliminary Table 6 NMEA Output Messages NMEA Description Default On Message SID Software Version GGA GPS Fix Data Yes GLL Geographic Position Latitude Longitude No GSA GPS DOP and Active Satellites Yes GSV GPS Satellites in View RMC Recommended Minimum Specific GPS Transit Data Yes VTG Track Made Good and Ground Speed No BTO Built in Test Results ACK No CHS Channel Status Data Table 7 NMEA Input Messages NMEA Description Message INT Receiver Initialization LOG Message Log Control IOC Input Output Port Configuration MPC Message Protocol Configuration RST Command Reset BTI Command Built in Test Required Table 8 RTCM SC 104 Messages RTCM Description Message2. Preliminary RE DD RF8009 MICRO DEVICES GLOBAL POSITIONING SYSTEM RECEIVER Typical Applications Automotive Navigation Asset Tracking Fleet Management Telematics Marine Navigation Product Description The RFMD Global Positioning System GPS Receiver is a plug n play module designed for OEM use The 12 par allel channel GPS receiver works in a wide variety of end products including marine navigation telematics auto motive navigation and asset tracking The GPS receiver processes signals from all the visible GPS satellites broadcasting RF navigation information All in view sat ellite tracking produces highly accurate smoothed navi gation data The data is relatively immune to the position jumps that occur when fewer satellites are monitored Designed to withstand harsh industrial environments the GPS receiver performs robustly in situations where extreme vehicle movement or high signal blockage are concerns such as dense urban areas Optimum Technology Matching Applied O si But C GaAs HBT GaAs MESFET O SiBi CMOS SiGeHBT M si CMOS J InGaP HBT GaNHEMT SiGe Bi CMOS GPS Antenna 26 dB Gain D L1 BP Filter gt BAA tre le p Sensor sis
3. Type 1 Differential GPS Corrections Type 2 Delta Differential GPS Corrections Type 9 Partial Satellite Set Differential Corrections 14 10 Rev A0 030723
4. Filter aay Digital ond p 7 125 V Battery bee 10 GPIO20 csod ES ag e Functional Block Diagram Rev A0 030723 Package Style 38mmx38 mm Features Fast satellite time to first fix T TFF with a Rapid Acquisition Module Small footprint 38MMX38MM Supports 3D and 2D navigation modes Automatic Cold Start Acquisition Process Ordering Information RF8009 1 Global Positioning System Receiver with straight I O connector and right angle MCX RF connector RF8009 2 GPS Receiver with straight I O connector and straight MCX RF connector DK8009 Global Positioning System Receiver Evaluation Kit Tel 336 664 1233 Fax 336 664 0454 http www rfmd com RF Micro Devices Inc 7628 Thorndike Road Greensboro NC 27409 USA 14 1 RF8009 Preliminary Absolute Maximum Ratings Power must be within the specified limits within 40ms after power turn on Results with Power Management software using external hardware control This datasheet is for Software version 4 7 0 or later 14 2 Parameter Rating Unit LD Caution ESD sensitive device Supply Current 210 mA RE Input Level 20 dBm RF Micro Devices believes the furnished information is correct and accurate Operating Ambient Temperature 40 to 85 C at the time of this printing However RF Micro Devices reserves the right to Storage Temperature 40 to 85 make changes to its produ
5. C with no signal blockage 3Not available in real time to the receiver Navigation Modes The GPS receiver supports three navigation modes three dimensional 3D two dimensional 2D and Differential GPS DGPS When four or more satellites are available with good geometry the receiver enters the 3D navigation mode When fewer than four GPS satellites are available or when a fixed altitude can be used to produce an acceptable result the GPS receiver enters the 2D navigation mode To calculate a fix in 2D navigation mode the receiver uses either the last altitude determined in 3D navigation mode or data supplied by the user In 2D navigation navigational accuracy is primarily determined by the relationship of the fixed value of altitude to the true altitude of the antenna When four or more satellites are available with differential corrections the receiver enters the DGPS navigation mode Accuracy is a function of the entire GPS system including the geometry of the satellites at the time of measurement Individual GPS receivers have very little influence over position accuracy Navigational accuracies are provided in Table 2 Table 2 Navigational Accuracy Position 2drms 95 All in View Horizontal Vertical 5 8m 9 7m Velocity DGPS Time 0 06 m s sim 100ns Power Modes The GPS receiver has the following three power modes Off Mode The receiver is completely de energized at all
6. DC supplies input signals and control signals Operate Mode The receiver operates normally when an external DC supply is connected to the receiver s primary input terminal V3 3P Battery Back up The receiver enters battery back up mode when the primary input power voltage is removed pro Mode vided an external DC supply is connected to the RTC terminal V2 5BU If the receiver is powered up in this mode it uses the current time from the RTC and critical satellite data stored in flash mem ory to achieve rapid TTFF Electrical Requirements The host system supplies power as specified in the parameter table Rev A0 030723 14 7 RF8009 Preliminary Antenna Power The GPS receiver passes the voltage applied to the V ANT pin on the I O connector to the center conductor of the RF connector The voltage to V ANT can be either positive or negative and can range up to 15Vp NOTE No form of current limiting is provided and damage to the board may result if the RF center conductor is shorted to ground Antenna preamp pass through current must be limited outside the receiver Antenna Sense Circuit Optional Feature The optional antenna sense feature is useful for verifying the proper connection to the GPS antenna With this feature implemented the GPS receiver is capable of detecting antenna undercurrent and overcurrent conditions The antenna sense status can be requested using the IBIT message and the results wi
7. F connector V2 5BU Provides a back up power connection for the receiver s real time clock RTC Input power requirements are defined in Table 3 RX2 Auxiliary asynchronous full duplex serial data port receive RX line DGPS RTCM SC 104 mes sage protocol is supported The default settings are Message format RTCM SC 104 Baud 9600 Parity None Data Bits 8 Stop Bit 1 For additional information see the GPS receiver evaluation kit user manual 9 TX2 Auxiliary asynchronous full duplex serial data port transmit TX line 10 GPIO20 General purpose input output NIR QO 14 8 Rev A0 030723 Preliminary RF8009 Message Definitions The following Binary and NMEA message definitions are provided in the RFMD GPS Receiver User Manual available with purchase of the GPS Receiver Evaluation Kit Contact RFMD customer service for more information Table 4 Binary Output Messages Binary Description Default On Message ONVD Navigation Solution Data Yes OSAT Visible Satellites On update Channel Status Yes DGPS Status No DGPS Configuration No Navigation Validity Configuration Once at Power Up Reset Navigation Platform Configuration No Cold Start Configuration Once at Power Up Reset Map Datum Select Once at Power Up Reset User Datum Definition No UTG Time Mark Pulse Yes Download Ephemeris Data No Download UTC IONO Data No Satellite Health Masking Configuration No
8. convection Temperature 40 85 C Operating Storage Humidity 95 Relative humidity up to 95 non condensing or a wet bulb temperature of 35 C which ever is less Altitude 1000 60 000 ft Maximum Vehicle Dynamic 515 m s Acquisition and navigation meters per second Jerk 5 m s Acceleration 4 G Rev A0 030723 14 3 RF8009 Preliminary 14 4 Package Style Module 38 mmx38mm RF8009 1 right angle MCX RF connector configuration 5 20 2 00 2 54 4 PLACES N Tri O 38 ia 32 42 28 32 20 38 gt ase 2795 Ll 2 79 k 0 22 k 2 20 24 55 32 42 4 11 1 a 5 74 38 00 RF8009 2 straight MCX RF connector configuration 2 54 4 PLACES v ka O 4 11 1 93 279 1 57 kl 2 79 6 22 k 24 55 gt 32 42 _ gt 38 00 Rev A0 030723 Preliminary RF8009 Rev A0 030723 I O Connector Detail Samtec part number TMMH 104 01 F D LEAD STYLE 7 67 3 20 2 46 01 0 302 0 126 0 097 RF8009 Preliminary Theory of Operation The RFMD GPS receiver is a single board 12 parallel channel engine designed for OEM use The GPS receiver pro cesses signals from the visible GPS sat
9. cts without notice RF Micro Devices does not assume responsibility for the use of the described product s Parameter Spec Ncanon Unit Condition Min Typ Max External Power Requirements Voltage 3 17 3 3 3 43 Voc Operate mode 1 65 2 5 2 7 Voc Battery backup mode Power Consumption 410 mw 1 second updates 145 mw 1 minute updates 40 mw 5 minute updates 6 pA Battery backup mode Ripple Peak to Peak 100 mV Operate mode N A Battery backup mode Signal Acquisition Performance Accuracy Horizontal 5 8 m 2d RMS Vertical 9 7 m 2d RMS Velocity 0 06 m s 1 Sigma DGPS lt 1 m 2d RMS Solution Update Rate 1 sec Time Mark 1 sec 1s 100ns 1 Sigma Serial Data Output Protocol Binary NMEA 0183 Serial Ports Primary Port 19 200 bps Binary no parity 8 data bits 1 stop bit Auxiliary Port 9600 bps RTCM SC 104 no parity 8 data bits 1 stop bit Antenna Requirements Frequency 1575 MHz Antenna Gain 3 dBic At 90 elevation Amplifier Gain 26 dB Including cable loss Amplifier Filter Noise Bandwidth 20 MHz At the 3dB points Noise Figure 2 5 dB Connector Type MCX Amplifier Voltage 3Vpc to 5Vpe 50 mA Supplied by OEM RF Signal Environment RF Input Frequency 1575 42 MHz L1 frequency band RF Input Power 31 dB Hz Sensitivity 113 dBm Costas threshold Rev A0 030723 RF8009 Preliminary Specification 5 ice Parameter i Unit Condition Min Typ Max Environmental Requirements Cooling Free air Operating Storage
10. e in memory The receiver enters this mode on start up when battery back up power is not maintained In this mode the receiver has the following valid data either available in memory or provided by the user at initialization position time almanac and frequency standard parameters The receiver enters this mode following a long power off cycle greater than a few hours when battery back up power is maintained Cold Start Warm Start In this mode the receiver has the following valid data available in memory position velocity time ephemeris almanac and frequency standard parameters The receiver enters this mode following a software reset or on short power off cycles less than a few hours when battery back up power is maintained In this mode the receiver has experienced a signal blockage for a short period of time less than 10seconds that was preceded by a period of continuous navigation Hot Start Reacquisition 14 6 Rev A0 030723 Preliminary RF8009 Table 1 below indicates the time to first fix TTFF when operating in each of the signal acquisition modes Table 1 Signal Acquisition Mode Performance Initial Position Tolerance 3 Sigma Acquisition Mode TTFF Position Velocity Time Maximum Maximum seconds km m sec minutes Almanac Age Ephemeris Age weeks hours Cold Start N A3 4 Reacquisition 1 100 75 5 1 4 Typical values Times given are valid at 25
11. ellites broadcasting RF navigation information All in view satellite tracking pro duces highly accurate smoothed navigation data The data is relatively immune to the position jumps that occur when fewer satellites are monitored Designed to withstand harsh industrial environments the GPS receiver performs robustly in situation such as dense urban areas where extreme vehicle movement or high signal blockage are concerns When fewer than four satellites are available or when operating conditions require the GPS receiver supports 2D naviga tion To calculate a fix while in 2D navigation mode the receiver uses either the last altitude determined while in 3D nav igation mode or data supplied by the user Satellite acquisition can be obtained under most initialization situations as long as the receiver can see the satellites Rapid time to first fix TTFF is a feature of the Rapid Search Engine The flexible satellite acquisition system takes advantage of all available information to provide rapid TTFF even without user initialization To minimize TTFF when pri mary power is removed from the receiver a DC supply voltage maintains the real time clock RTC This allows the GPS receiver to use the prior position data and satellite information stored in the GPS receiver s flash memory The receiver has two independent asynchronous serial input output ports The receiver s primary serial port outputs navigation data and accepts commands
12. in the NMEA 0183 or binary message formats The receiver s secondary serial port accepts differential GPS DGPS corrections in RTCM SC 104 format See the Message Definitions section for more information Receiver Architecture The GPS receiver chipset includes all the radio frequency RF direct sampling and amplification circuitry These circuits present both the sign and magnitude of sampled data to the digital ASIC The digital ASIC contains an integral micropro cessor PowerPC 401 the GPS signal processing SRAM and the RTC Memory and other supporting components are needed to make a complete navigation system Receiver Operation The receiver requires 3 3V DC primary input power The receiver s antenna must have visibility of the sky in order to acquire enough satellites to produce a navigation solu tion While this is usually not a problem outdoors operation indoors or in a vehicle may require that the antenna be located with an unobstructed view of the sky If the satellites are blocked from the receiver s antenna the receiver will take longer to acquire a position If fewer than four satellites are available the receiver may be able to determine a valid 2D position solution by using altitude aiding Signal Acquisition Modes The GPS receiver supports the following four signal acquisition modes depending on the availability of critical data In this mode the receiver has valid almanac and frequency standard parameters availabl
13. ll be reported in the OBIT message NOTE If the optional antenna sense circuit is used the voltage to the V ANT pin on the GPS receiver connector may either be 3 3 V or 5Vpc depending on the specific antenna requirements DC current is limited on the board to approx imately 100 mA Input Output Signals Signals are listed by pin number and described in Table 3 All digital I O signals are 2 5Vpe CMOS buffered signal levels tolerant of 3 3 Vpc Table 3 Input Output Connections Pin Signal Description Number Name 1 V3 3P Main power input to the receiver Input power requirements are defined in Table 3 2 GND DC ground to the receiver 3 TX1 Primary asynchronous full duplex serial data port transmit TX line Binary and NMEA mes sage protocols are supported The default settings are Message format Binary Baud 19200bps Parity None Data Bits 8 Stop Bit 1 For additional information see the GPS receiver evaluation kit user manual 4 RX1 Primary asynchronous full duplex serial data port receive RX line Binary and NMEA message protocols are supported The default settings are Message format Binary Baud 19200bps Parity None Data Bits 8 Stop Bit 1 For additional information see the GPS receiver evaluation kit user manual TMARK UTC time mark pulse one pulse per second The Binary message OTMP contains the UTC time associated with the time mark pulse V ANT Provides a power connection to the center conductor of the R
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