GXB5005

SMD Type GPS Receiver Module GXB5005 Description The GXB5005 is a 12-channel GPS (Global Positioning System) receiver module. This small module includes all the functions required for GPS and is designed for using an active antenna. The GXB5005 can support the various kinds of the portable applications as well as the car navigation system. Features General Implementation of Sony CXD2951GA-4 single chip GPS Small size with SMD type pads and shield case Module size (typ.): 22.4 (W) × 23.5 (D) × 3.2 (H) [mm] Current consumption: Acquisition (typ): 70 [mA] Tracking (typ): 41 [mA] Battery backup (typ): 7 [µA] Datum: WGS-84 Communication method: Supports NMEA-0183 version 3.01 Internal 32.768kHz RTC Internal 18.414MHz TCXO Antenna input 50Ω Recommended antenna element An active antenna with 0dB and RF amplifier with NF ≤ 2dB, 8 to 30dB gain Functionality 12-channel GPS receiver capable of simultaneously receiving 12 satellites All-in-view measurement Valid fix indication output 1PPS output WAAS/EGNOS compatible Supported baud rate: 4800bps/9600bps/19200bps/38400bps by HW setting Internal power on reset circuit Antenna sense (option) Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. -1- E05728-PS GXB5005 Performance Tracking sensitivity: –152dBm (typ.) Acquisition sensitivity: –139dBm (typ.) Time to first fix (time until initial measurement after power-on) (typ., Open sky) Cold start (without ephemeris and almanac): 40s Warm start (without ephemeris with almanac): 33s Hot start (with ephemeris and almanac): 2 to 3s Positioning accuracy (Open air with ≥ –130dBm, PDOP ≤ 2.0) Stand alone (GPS unit only) 2DRMS: approx. 2m Follow-up performance: Velocity: 500km/h or less Acceleration: 1G or less Absolute Maximum Ratings Item Power supply voltage Input voltage Output voltage Operating temperature Storage temperature Symbol VDD VI VO Topr Tstg Min. –0.5 –0.5 –0.5 –40 –40 Max. 3.7 5.5 VDD + 0.5 +85 +105 Unit V V V °C °C Operating Conditions Item Power supply voltage Power supply voltage ripple Backup battery voltage Input pin voltage Supply current: Acquisition (25°C) Supply current: Tracking (25°C) Standby current Operating temperature Reception frequency, L1 CA code Symbol VDD VDD-rip Vbat VIN ICC ICC Istdby Topr FIN –40 2.6 –0.3 70 41 7 +25 1575.42 120 +85 2.8 Min. 3.1 Typ. 3.4 Max. 3.7 50 3.0 5.5 Unit V mVp-p V V mA mA µA °C MHz -2- GXB5005 Architecture CXD2951 TCXO CPU BPF Down Converter LNA SAW LNA TCXO Baseband Unit 1.023MHz LPF Freq. Synthesizer CMOS Radio Block 1 bit RF/IF Unit Acquisition Block Tracking Block ARM7TDMI Host I/O Control signal JTAG, GPIO, etc. RAM/ ROM CXO 32.768kHz CPU Multiplier/ Divider RTC Time Counter Computation & Control Block CPU, Counter DLL, D.MF, S/P 1.8V Regulator TCXO 18.414MHz -3- GXB5005 Pin Configuration (Top View) 32kHz X'tal 22.4mm 1. AD In0 2. AD In1 3. ANT Cont 4. BR1 5. BR0 6. RXD0 7. TXD0 8. WA1 9. WA0 19. 1PPS 18. B.U. 17. VDD 16. RST CXD2951 15. GND 14. GND 13. Status Out 12. RF GND 11. RF IN 10. RF GND Regulator 23.5mm LNA TCXO RF Shield Case Land Pin Description Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Symbol AD In0 AD In1 ANT Cont BR1 BR0 RXD0 TXD0 WA1 WA0 RF GND RF IN RF GND Status Out GND GND RST VDD B.U. 1PPS O I I I/O I I I/O I I I O I I Description Antenna sense input 0 Antenna sense input 1 Antenna sense enable (High active) Baud rate setting 1 Baud rate setting 0 UART (CH0) reception data UART (CH0) transmission data WAAS enable 1 WAAS enable 0 RF GND GPS signal input RF GND Status output GND GND Hardware reset (Low active) Power supply 3.4V Battery backup 2.8V 1PPS output -4- GXB5005 Baud Rate Setting Baud rate 4800 9600 19200 38400 BR1 Open (L) Open (L) H H H Open (L) Open (L) H BR0 WAAS Enable WAAS Command*1 Disable Enable *1 WA1 Open (L) H H WA0 Don’t care Open (L) H WAAS function is set by @WA command via UART when WA1 is Low. -5- GXB5005 Electrical Characteristics DC Characteristics (Ta = –40 to +85°C) Item Supply voltage Supply voltage ripple H level Input voltage Output voltage L level AD H level L level Symbol VDD Vbat VDD-rip VIH VIL VAD VOH VOL ICC (3.3V) Istdby IOH = –8mA IOL = 2mA Acquisition Tracking Vbatt = 2.8V 70 41 7 120 2.0 –0.3 0 2.4 0.4 Condition Min. 3.1 2.6 Typ. 3.4 2.8 Max. 3.7 3.0 50 5.5 0.8 (VDD – 0.1) Unit V V mVp-p V V V V V mA µA 17 18 17, 18 3, 4, 5, 6, 8, 9, 16 1, 2 3, 7, 19 Pins Current consumption 17 18 AC Characteristics (Ta = 25°C) Item C/N output value TCXO frequency Message latency RF gain Noise figure Output signal rise time Output signal fall time *1 Symbol CN Ftcxo Tl Grf NF Ttlh Tthl Condition –130dBm input, Tracking, *1 Internal Min. Typ. 42 18.414 Max. Unit dB MHz 1.0 114 2 Zload = 5kΩ, 20pF Zload = 5kΩ, 20pF 25 30 55 60 s dB dB ns ns Using SONY evaluation software “GPS View” Timing of Output Signal Pin 7 (TXD0) 20pF 5kΩ Ttlh 10% 10% 90% 90% -6- GXB5005 Status Out “Status Out” signal turns over 1. Definition of internal status Searching: Searching satellites after initialization Tracking: Navigation message decoded at least one satellite Positioning: Position fixing 2. “Status Out” status by each internal status Reset: Input, pulled down internally Initialization: Output Low Searching: Output 1s High, 1s Low turn over Tracking: Output 0.5s High, 0.5s Low turn over Positioning: Output High (keeping) 1 H Searching L H Tracking L H Positioning L 0.5s 0.5s 1.0s 1.0s 2 3 4 3. Jitter Turns over regular pulse width ±5% max. |T – T1| / T ≤ 5% T H T1 T: Regular pulse width (1s/0.5s) T1: Actual pulse width H T1 L T L 4. Status transition Check internal status every 0.5s, only the status changes, “Status Out” output logic turns over and keeps specified High-Low output interval. Only status changes to positioning, “Status Out” output turns over High caused by the previous status. 1.0s High Status Out Low Searching 0.5s Tracking Change state Change state Positioning -7- GXB5005 UART Interface Interface: Baud rate: Start bit: Data bit: Stop bit: Parity bit: Flow control: Data output cycle: 1 Asynchronous serial interface (UART) 4800bps/9600bps/19200bps/38400bps 1 bit 8 bits 1 bit None Xon/Xoff Approximately 1 second (default) LSB D0 D1 D2 D3 D4 D5 D6 MSB D7 0 Start bit 1 bit Data bit 8 bits Stop bit 1 bit NMEA0183 Format The GXB5005 can output 8 different types of sentence: GPGGA, GPGLL, GPGSA, GPGSV, GPRMC, GPVTG, GPZDA and PSGSA. If 9600bps, 19200bps or 38400bps baud rate is set for port setting, it outputs 7 types of sentence: GPGGA, GPGSA, GPGSV, GPRMC, GPVTG, GPZDA and PSGSA as default. Moreover, if 4800bps baud rate is set, it outputs 4 types of sentences: GPGGA, GPGSA, GPGSV and GPRMC as default. NMEA Message Output Timing NMEA messages are output within 1s after the 1PPS pulse. t+1 t+2 t+3 t+4 t+5 t+6 T 1PPS t+1 t+2 t+3 t+4 t+5 t+6 NMEA -8- GXB5005 1PPS Output The 1PPS output provides a timing pulse synchronized to GPS time once a valid fix is available. The figure below shows the behavior of the 1PPS output signal after reset. For a period of 160µs after reset, the 1PPS signal outputs the system clock. The actual 1PPS signal is activated at 500ms after reset. Reset 1+ ECLKOUT (1PPS) 500ms 1PPS signal output occurs 500ms after reset Expansion 160µs Reset 1+ ECLKOUT (1PPS) CPU clock exists for 160µs after reset Expansion Reset 1+ ECLKOUT (1PPS) 145ns (6.90MHz) -9- GXB5005 Backup Mode The backup mode is established by setting all inputs Low except for B.U. (Vbat: 2.6 to 3.0V). In this mode, the low power consumption can be achieved by stopping all oscillators except for RTC oscillator. Although all registers are initialized, the SRAM for both of Ephemeris data and Almanac data in backup area are held. Antenna Sense (Option) The antenna sensing function detects three kinds of external active antenna connection conditions, open/ normal/short, by using A/D converter incorporated into the CXD2951. The @ANT command shows the previous antenna sensing result and users would know the three kinds of conditions. For details, see the CXD2951 Communication Command Specifications. T+1 T+2 T+3 T+4 T+5 T+6 T+7 T+8 T + 9 T + 10 T + 11 T + 12 T + 13 T + 14 T + 15 T + 16 T + 17 (Second) RTC Antenna condition open normal short normal Voltage (RFIN) VDD 0 Approx.1s Approx. 3s Approx. 3s Antenna status detection timing Threshold Levels The threshold current Ir is as follows when VDD = 3.3V. open: Ir < 3.6mA normal: 3.7mA ≤ Ir ≤ 44.0mA short: 44.0mA < Ir - 10 - GXB5005 Reference Circuit The antenna sense circuit is available by putting a few components on the customer board. Refer to the following diagram. Antenna Power 3V GXB5005 CXD2951 EPORT12 EVON1 EVON0 ANT Cont AD In1 AD In0 10kΩ Sense Resistor (1/8W) 22Ω Choke Coil Inductor To Active Antenna Customer Board Antenna Connector Command Specifications The GXB5005 modules have a command format, NMEA-0183 version 3.01. A list of the supported UART interface is as follows. For detailed descriptions, see the CXD2951 Communication Command Specification document. - 11 - GXB5005 Mechanical Dimensions (Unit: mm) 9.8 22.4 21.55 3.2 - 12 - R0.4 Top View P = 2.2 1.1 23.5 22 1.1 P = 2.2 1.2 Sony Corporation