常天 GPS导航设备-GPS-24/24A说明书.pdf-资料库

Rikaline GPS-24 / 24A GPS Receiver Board User’s Guide Nemerix V1.0 Feb 28, 2005 Rikaline International Corp. 14F, 171, ChengGong Rd., Sanchong City, Taipei 241, Taiwan, R.O.C Phone: +886-2-8973-1899 Fax: +886-2-8973-1896 E-Mail: info@rikaline.com.tw Web: www.rikaline.com.tw All Right Reserved

GPS Receiver Board GPS-24 / 24A Operating Manual Rikaline 1. Introduction 1.1 Overview The Rikaline GPS-24 / 24A is a GPS receiver board featuring Nemerix low power architecture. This complete enabled GPS receiver board provides high position and speed accuracy performances as well as high sensitivity and tracking capabilities in urban canyon conditions. The solution enables small form factor package. The GPS-24 / 24A delivers major advancements in GPS performances, accuracy, integration, computing power and flexibility. It is designed to simplify the embedded system integration process. This positioning application meets strict needs such as car navigation, mapping, surveying, agriculture and so on. Only clear view of sky and certain power supply are necessary to the unit. GPS-24 / 24A communicates with other electronic utilities via compatible dual-channel through TTL and saves critical satellite data in built–in memory backup. With low power consumption, the GPS-24 / 24A tracks up to 16 satellites at a time, re-acquires satellite signals in 100 ms and updates position data every second. 1.2 Features The GPS-24 / 24A provides a host of features that make it easy for integration and use. 1. Position accuracy in < 7m CEP (90%) without SA (horizontal) 2. Ultra low power: 30mW typical -- tracking at 3.3 Volts, full power 3. High sensitivity: to -152 dBm tracking, superior urban canyon performances 4. Small form factor and low cost solution 5. Ready-to-plug solution. Easily integrated into existing systems 6. On-board RAM for GPS navigation data 7. PPS output (User may have different interval setting from 1 second to 1 minute. 8. Differential capability utilizes real-time RTCM corrections producing < 1 meter position accuracy. 9. FLASH based program memory: New setting is stored permanently. 1.3 Application 1. Car Navigation 2. Mapping 3. Surveying 4. Agriculture 5. Palmtop, Laptop, PDA 6. Location Based Services enabled devices 7. Asset management/tracking 8. Handheld receivers 9. Radar detector with GPS function 1.4 Technology specifications 1.4.1 Physical Dimension 1. Size: 25.9(W) x 25.9(D) x 2.7(H) (mm) 1.02”(W) x 1.02”(D) x 0.11”(H) 2. Weight: 21 g 1.4.2 Environmental Characteristics 1) Operating temperature: -40oC to +80oC (internal temperature) 2) Storage temperature: -55oC to +100oC 1.4.3 Electrical Characteristics 1) 2) MMCX antenna connector: Active or patch (3.0V antenna is recommended). 1.4.4 Performance 1) Tracks up to 16 satellites. 2) Update rate: 1 second. 3) Sensitivity: Input voltage: +3.3 ±5% VDC. Specifications subject to change without prior notice Rikaline International Corp. 14F, 171, ChengGong Rd, Sanchong CityTaipei 241, Taiwan Tel: ++886 2 8973 1899 Fax: ++886 2 8973 1896 E-Mail: info@rikaline.com.tw Web: www.rikaline.com.tw 2

GPS Receiver Board GPS-24 / 24A Operating Manual Rikaline Tracking: -152dBm Acquisition: -139dBm 3) Acquisition time: Reacquisition Hot start Warm start Cold start 4) Position accuracy: 0.1 sec. (90%) 12 sec. (90%) 38 sec. (90%) 60 sec. (90%) Non DGPS (Differential GPS) Position Velocity Time DGPS (Differential GPS) <7m CEP (90%) with S\A off 0.1 meters/second. 1 microsecond synchronized GPS time Position Velocity <1 m, typical 0.05 meters/second, typical 5) Dynamic Conditions: 10,000 meters(32,800 feet) max Altitude Velocity Horisontal 300 Km/Hr Vertical 36 Km/Hr 2 G, max Acceleration Jerk 4 meters/second³, max 6) Time-1PPS Pulse (optional) Level Pulse duration Time reference Measurements TTL 100ms at the pulse positive edge Aligned to GPS second, +-1 microsecond 7) 2.1.10 Recommended External Antenna Specification Gain Noise figure Current Operate Voltage 20dB (including cable loss) 1.5dB 3 ~ 30mA 2.5 ~ 2.8V 1.4.5 Interfaces 1) Dual communication channel through TTL, with user selectable baud rate (4800, 9600-Default, 19200, 38400). 2) NMEA 0183 Version 3.0 ASCII output (GGA, GSV(3), GSA(3), RMC, VTG). 3) Real-time Differential Correction input (RTCM SC-104 message types 1, 2 and 9). Specifications subject to change without prior notice Rikaline International Corp. 14F, 171, ChengGong Rd, Sanchong CityTaipei 241, Taiwan Tel: ++886 2 8973 1899 Fax: ++886 2 8973 1896 E-Mail: info@rikaline.com.tw Web: www.rikaline.com.tw 3

GPS Receiver Board GPS-24 / 24A Operating Manual Rikaline 2. Operational characteristics 2.1 Initialization As soon as the initial self-test is complete, the GPS-22 begins the process of satellite acquisition and tracking automatically. Under normal circumstances, it takes approximately 120 seconds to achieve a position fix, 42 seconds if ephemeris data is known. After a position fix has been calculated, information about valid position, velocity and time is transmitted over the output channel. The GPS-22 utilizes initial data, such as last stored position, date, time and satellite orbital data, to achieve maximum acquisition performance. If significant inaccuracy exists in the initial data, or the orbital data is obsolete, it may take more time to achieve a navigation solution. The FirstGPS™ architecture provides superior performance. However, acquisition performance can be improved as the host system initializes the GPS-22 in the following situation: 1. Moving further than 1,500 kilometers. 2. Failure of Data storage due to the inactive memory power back up. 2.2 Navigation After the acquisition process is complete, the GPS-22 sends valid navigation information over output channels. These data include: 1) Latitude/longitude/altitude 2) Velocity 3) Date/time 4) Error estimates 5) Satellite and receiver status The GPS-22 sets the default of auto-searching for real-time differential corrections in RTCM SC-104 standard format, with the message types 1, 2, or 9. It accomplishes the satellite data to generate a differential (DGPS) solution. The host system, at its option, may also command the GPS-22 to output a position whenever a differential solution is available. Specifications subject to change without prior notice Rikaline International Corp. 14F, 171, ChengGong Rd, Sanchong CityTaipei 241, Taiwan Tel: ++886 2 8973 1899 Fax: ++886 2 8973 1896 E-Mail: info@rikaline.com.tw Web: www.rikaline.com.tw 4

GPS Receiver Board GPS-24 / 24A Operating Manual Rikaline 3. Hardware interface 3.1 Physical Characters 1. Size: 25.9(W) x 25.9(D) x 2.7(H) (mm) 2. Weight: 25 g 1.02”(W) x 1.02”(D) x 0.11”(H) 3.1.1 Details Drawing 3.1.1.1GPS-24 (to be equipped with active antenna only) Pin A1 Pin D1 Pin 1 Pin 1 Pin D1 Pin A1 1// Antenna connector: 1.27 mm pitch, 3 pin board to board 2// Interface connector: 1.27 mm pitch, 10 pin board to board 3// Debug connector: 1.27mm pitch, 6 pin board to board 3.1.1.1GPS-24A (to be itegrated with passive antenna or/and active antenna) Specifications subject to change without prior notice Rikaline International Corp. 14F, 171, ChengGong Rd, Sanchong CityTaipei 241, Taiwan Tel: ++886 2 8973 1899 Fax: ++886 2 8973 1896 E-Mail: info@rikaline.com.tw Web: www.rikaline.com.tw 5

Reserved, keep float Low Active, keep float if not use *1 Will not effect hot, or cold start Backup Battery Input (1.2~2V) PIN 1 2 3 4 5 6 7 8 9 10 A1 A2 A3 D1 D2 D3 D4 D5 D6 NAME GPIO(4) NC (MODE) NMEA Tx NMEA Rx NC (WAKE UP) NU I Reset VBAT I GND VCC GPIO(0) RF GND RF IN RF GND DSUMUX DSUEN DSUBRE DSUTX DSURX DSUACT I I I O I O DESCRIPTION TYPE I \ O GPS Status NU I \ O NMEA Serial Data Output I \ O NMEA Serial Data Input Reserved, keep float PWR Ground PWR +3.0~3.6V DC Power Input I \ O SW dependent functions ANT Antenna ground ANT Antenna + ANT Antenna ground Serial / DSU select DSU enable DSU break enable DSU transmitter DSU receiver DSU active GPS Receiver Board GPS-24 / 24A Operating Manual Rikaline 3.2 Pin Definition Remarks 3.3 Operating Modes 3.3.1 GPIO(1) & (4) It design as spare I\O. You may leave it disconnect of desire. 3.3.2 Reset: It always requires reset when power-up. Max voltage is 2.0VDC And will not effect cold start or hot start. 3.3.3 Debug Pins All pins from D1 to D6 are for development purposes, not for end users except downloading new software. 3.3.4 Developing Kit Available at part no. GPS-24-SDK 3.4 Other Electrical Specification Table 3-1 Absolute Maximum Ratings Parameter Power Supply Voltage Input Pin Voltage Output Pin Voltage Reset Pin Voltage Storage Temperature Back-up Voltage Symbol VDD VIN VOUT Vreset TSTG BAT Table 3-2 Operating Conditions Parameter Power Supply Voltage Input Pin Voltage Operating Temperature Operating Current ZX4120 Symbol VCC VIN TOPR ICC Min -0.3 -0.3 -0.3 -0.3 -40 Max 3.6 3.3 3 2.0 100 2.2 Units V V V V °C V Min 3 2.7 -40 Typ 3.3 3 27 Max 3.6 3.3 85 Units V V °C mA Specifications subject to change without prior notice Rikaline International Corp. 14F, 171, ChengGong Rd, Sanchong CityTaipei 241, Taiwan Tel: ++886 2 8973 1899 Fax: ++886 2 8973 1896 E-Mail: info@rikaline.com.tw Web: www.rikaline.com.tw 6

GPS Receiver Board GPS-24 / 24A Operating Manual Rikaline Table 3-3 Backup Battery Conditions Parameter RTC(Battery) Power Supply Current Symbol BAT Table 3-4 DC Characteristics Parameter Input High Level Input Low Level Output High Level Output Low Level Input Leakage Current Symbol Vih Vil Voh Vol Li Min 1.2 Typ 1.8 10 Max 2 Units V µA Min 2.5 0 2.4 0 2 Max 3.5 0.8 3.4 0.4 2 Units V V V V µA Specifications subject to change without prior notice Rikaline International Corp. 14F, 171, ChengGong Rd, Sanchong CityTaipei 241, Taiwan Tel: ++886 2 8973 1899 Fax: ++886 2 8973 1896 E-Mail: info@rikaline.com.tw Web: www.rikaline.com.tw 7

GPS Receiver Board GPS-24 / 24A Operating Manual Rikaline 4. Software Interface The GPS-24 / 24A interface protocol is based on the National Marine Electronics Association's NMEA 0183 ASCⅡ interface specification, which is defined in NMEA 0183, Version 3.0 and the Radio Technical Commission for Maritime Services (RTCM Recommended Standards For Differential Navstar GPS Service, Version 2.1, RTCM Special Committee No.104). 4.1 NMEA Transmitted Messages The GPS-24 / 24A outputs data in NMEA-0183 format as defined by the National Marine Electronics Association (NMEA), Standard. The default communication parameters for NMEA output are 9600 baud, 8 data bits, stop bit, and no parity. The default communication parameters for DGPS Input are 9600 baud, 8 data bits, stop bit, and no parity. Position accuracy of less than 5 meters can be achieved with the GPS-24 / 24A by using Differential GPS (DGPS) real-time pseudo-range correction data in RTCM SC-104 format, with message types 1, 5, or 9. As using DGPS receiver with different communication parameters, GPS-24 / 24A may decode the data correctly to generate accurate messages and save them in battery-back SRAM for later computing. 4.3 Earth Datums The GPS-24 / 24A is built in earth datum with WGS84. Table 4-1 NMEA-0183 Output Messages NMEA Record Description GPGGA GPGLL GPGSA GPGSV GPRMC GPVTG GPZDA Global positioning system fixed data Geographic position- latitude/longitude GNSS DOP and active satellites GNSS satellites in view Recommended minimum specific GNSS data Course over ground and ground speed Date & Time Detailed NMEA information is in Appendix A 4.2 RTCM Received Data Specifications subject to change without prior notice Rikaline International Corp. 14F, 171, ChengGong Rd, Sanchong CityTaipei 241, Taiwan Tel: ++886 2 8973 1899 Fax: ++886 2 8973 1896 E-Mail: info@rikaline.com.tw Web: www.rikaline.com.tw 8

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常天 GPS导航设备-GPS-24/24A说明书.pdf

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