达伽马 GPS导航设备-S-91说明书.pdf-资料库

S-91 Manual V1.0 GPS Engine Board Manual S-91 SiRF StarⅢ V 1.0 Made in Taiwan www.dagamagps.com 2008/08/08 E-mail:service@dagamagps.com Free service hot-line(for mainland):400-820-1322 The Specifications are subject to be changed without notice. Copyright @ 2008, Dagama Navigation. 1 of 25 Confidential 2008/08/08 Version:1.0

Contents S-91 Manual V1.0 1 INTRODUCTION ------------------------------------------------------------------------------------- 3 1.1 OVERVIEW ------------------------------------------------------------------------------------ 3 1.2 MAIN FEATURES ---------------------------------------------------------------------------- 3 1.3 SPECIFICATIONS ---------------------------------------------------------------------------- 4 1.4 PROTOCOLS ---------------------------------------------------------------------------------- 5 1.5 PROGRAMMING RESOURCES --------------------------------------------------------- 5 1.6 ANTENNA -------------------------------------------------------------------------------------- 5 2 HARDWARE INTERFACE -------------------------------------------------------------------------- 6 2.1 PCB DIMENSION ---------------------------------------------------------------------------- 6 2.2 PIN ASSIGNMENT --------------------------------------------------------------------------- 7 2.3 LAYOUT SUGGESTION -------------------------------------------------------------------- 10 2.4 POWER SAVING ----------------------------------------------------------------------------- 10 2.5 ANTENNA APPLICATION ----------------------------------------------------------------- 11 2.6 RF_IN IMPEDANCE MATCHING -------------------------------------------------------- 15 2.7 1PPS OUTPUT -------------------------------------------------------------------------------- 17 3 SOFTWARE INTERFACE --------------------------------------------------------------------------- 17 3.1 NMEA OUTPUT MESSAGES--------------------------------------------------------------- 17 3.2 GPGGA - GLOBAL POSITIONING SYSTEM FIX DATA ----------------------------- 18 3.3 GPGLL - GEOGRAPHIC POSITION - LATITUDE / LONGITUDE ------------------ 29 3.4 GPGSA - GNSS DOP AND ACTIVE SATELLITES -------------------------------------- 20 3.5 GPGSV - GNSS SATELLITES IN VIEW --------------------------------------------------- 20 3.6 GPRMC - RECOMMENDED MINIMUM SPECIFIC GNSS DATA ------------------- 21 3.7 GPVTG - COURSE OVER GROUND AND GROUND SPEED ------------------------ 22 3.8 GPZDA - SIRF TIMING MESSAGE -------------------------------------------------------- 23 3.9 GPADT – PROGIN ANTENNA DETECTION MESSAGE ------------------------------ 23 The Specifications are subject to be changed without notice. Copyright @ 2008, Dagama Navigation. 2 of 25 Confidential 2008/08/08 Version:1.0

S-91 Manual V1.0 1. Introduction 1.1 Overview The Dagama S-91 is a tiny, low-power, ultra-high performance, easy to use SMT mountable GPS receiver module based on SiRF’s latest third generation single chip. Its small size/low power consumption/high performance enables the adoption of small handheld applications such as personal navigation device, PDA, GPS watch, personal locator etc. Its SMT design allows automatic pick and place assembly process. Additional convenient features of S-91 make it the best choice of GPS application. In addition to the active and passive antenna support via pin RF_IN, an on-board I-PEX connector to GPS antenna eliminates the complex performance tuning process. Just plug an antenna to the I-PEX connector and the solution is ready for use. It reduces the development efforts and shortens the development time. For active antenna applications, the built-in antenna surveillance not only reports the anomaly of short circuit (accidental events) and open circuit (malicious cut of antenna) but also protects the device. Not only the built-in software power saving mechanism, it also supports hardware power saving via pin PWR_CTRL to fully cut off the power supply of S-91. 1.2 Main Features Not only handheld but also any other GPS applications can share the following major features of S-91. ★ Full implementation of ultra-high performance SiRFstarIII single chip architecture ★ High tracking sensitivity of -159dBm ★ Low power consumption of 40mA at full tracking ★ Ultra-small size of 17 (W) x 22.4 (L) x 2.4 (H) (mm) ★ Additional hardware power saving control pin ★ Active and passive antenna support via pin RF_IN ★ Additional I-PEX connector eliminates the efforts of RF performance tuning ★ Backup power supply pin for hot/warm starts and better performance ★ Embedded ARM7 CPU is available for external applications ★ SMT automatic pick and place assembly support to reduce production cost ★ Firmware upgradeable for future potential performance enhancements ★ Fully shielded for EMC protection ★ Active antenna surveillance and protection (optional) The Specifications are subject to be changed without notice. Copyright @ 2008, Dagama Navigation. 3 of 25 Confidential 2008/08/08 Version:1.0

1.3. Technical Specifications 1.3.1. Electrical Characteristics ◆ GPS receiver type S-91 Manual V1.0 20 channels, L1 frequency, C/A code ◆ Horizontal Position Accuracy < 2.5m (Autonomous) < 2.0m (WAAS) (50% 24hr static, -130dBm) ◆ Velocity Accuracy <0.01 m/s (speed) <0.01° (heading) (50%@30m/s) ◆ Time accuracy 1μs or less ◆ TTFF (Time to First Fix) Hot Start: 1s (50%, -130dBm, autonomous) Warm Start: 35s Cold Start: 42s ◆ Sensitivity (Autonomous) Tracking: –159dBm Acquisition: -142dBm (-142dBm 28dB-Hz with 4dB noise figure) ◆ Measurement data output Update time: 1 second NMEA output protocol: V.3.00 Baud rate: 4800 (default), 9600, 19200, 38400, 57600 bps (8-N-1) Datum: WGS-84 Default: GGA, GSA, RMC, VTG at 1Hz and GSV at 1/5Hz Other options: GLL, ZDA, or SiRF binary ◆ Max. Altitude ◆ Max. Velocity ◆ SBAS Support <18,000 m <1,852 km/hr WAAS, EGNOS The Specifications are subject to be changed without notice. Copyright @ 2008, Dagama Navigation. 4 of 25 Confidential 2008/08/08 Version:1.0

S-91 Manual V1.0 ◆ Dynamics <4g ◆ Power consumption ◆ Power supply ◆ Dimension 40mA, continuous tracking mode 3.3V single side 17.0(W) x 22.4(L) x 2.4(H) mm ◆ Operating temperature range ◆ Storage temperature range 1.4 Protocols Both NMEA and SiRF binary protocols could be supported via serial UART I/O port – -45 oC to +100 oC -40 oC to +85 oC RXA/TXA. The default supported protocol is NMEA protocol. 1. Serial communication channel i. No parity, 8-data bit, 1-stop bit (N-8-1) ii. User selectable baud rate among 4800, 9600, 19200, 38400, and 57600 (default 4800) bps. 2. NMEA 0183 Version 3.00 ASCII output i. Default GGA (1 sec), GSA (1 sec), GSV (5 sec), RMC (1 sec), VTG (1 sec) ii. Optional GLL, ZDA 1.5 Programming Resources The GPS receiver is embedded an internal ARM7 SOC. Its programming resources are available through the use of SDK from SiRF. Following are its related programming resources: ◆ 50-MHz ARM7TDMI processor ◆ 1 Mb SRAM ◆ 4 Mb flash memory Please note that the receiver itself will use part of above resources. 1.6 Antenna Antenna Type Active Antenna Recommendation Passive or active antenna via pin RF_IN, or External antenna via I-PEX connector Minimum gain Maximum noise figure 18d B 1.5dB The Specifications are subject to be changed without notice. Copyright @ 2008, Dagama Navigation. 5 of 25 Confidential 2008/08/08 Version:1.0

S-91 Manual V1.0 Antenna Supply Antenna Supervisor Using VCC_RF or external power source Short circuit detection Short circuit protection Short circuit report via GPIO Short circuit report via NMEA Open circuit detection Open circuit report via GPIO Open circuit report via NMEA Built-in Built-in Built-in Built-in Built-in Built-in Built-in The Specifications are subject to be changed without notice. Copyright @ 2008, Dagama Navigation. 6 of 25 Confidential 2008/08/08 Version:1.0

2 Hardware Interface 2.1 PCB Dimension The dimension of S-91 is 17 mm (W) x 22.4 mm (L) x 2.4 mm (H). S-91 Manual V1.0 The Specifications are subject to be changed without notice. Copyright @ 2008, Dagama Navigation. 7 of 25 Confidential 2008/08/08 Version:1.0

2.2 Pin Assignment 28-pin Interface Name Function S-91 Manual V1.0 Pin 1 LED/GPIO1 LED display for position fixing status or General Purpose 2 GPIO2 3 TXA 4 RXA 5 NC 6 VCC 7 GND 8 NC 9 NC 10 nRESET 11 V_BAT I/O control pin 1. Default for LED indication: Always “High” before position is fixed; Alternating “High” “Low” if position has fixed. General Purpose I/O control pin 2 Port A serial data output (from GPS); N-8-1, NMEA v3.00 output Port A serial data input (to GPS); N-8-1, accepts commands from external applications, e.g. SiRFDemo. No connection Main power supply of 3.3 ± 0.3VDC. 3.3VDC is the standard suggestion. This power is also used to keep the power of clock and fixing data. Ground No connection No connection Engine board reset input signal, active low, at least 250ms. This pin could be connected to a micro-processor’s GPIO pin to control the reset of the engine board. A low signal of 250ms will reset it and re-start the acquisition process again. It may be left open if it is not used. 2.0~3.6VDC backup battery connection for RTC and internal RAM - This pin is the source of the backup power supply. It allows the time and fixing data to be kept while the main power (VCC) is cut off. The time and fixing data could be used to help reduce the time to first fix (TTFF). - A power source could be connected to this pin directly. It inputs the power to keep clock and fixing data. I/O Output or I/O - Output Input - Input Input - - Input Power Input or Output The Specifications are subject to be changed without notice. Copyright @ 2008, Dagama Navigation. 8 of 25 Confidential 2008/08/08 Version:1.0

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达伽马 GPS导航设备-S-91说明书.pdf

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