Page 1
2008/07/10 This document contains information highly confidential to RoyalTek Company LTD (RoyalTek). It is provided for the sole purpose of the business discussions between customer and RoyalTek and is covered under the terms of the applicable Non-Disclosure Agreements. Disclosure of this information to other parties is prohibited without the written consent of RoyalTek.
1 Introduction RoyalTek REB-1315LPX small form factor board is the newest generation of RoyalTek GPS module. The module is powered by latest SiRF Star III single chip and RoyalTek proprietary navigation technology that provides you with stable and accurate navigation data. The smallest form factor and miniature design is the best choice to be embedded in a device such as portable navigation device, personal locator, speed camera detector and vehicle locator.
REB-1315LPX Operational Manual 1.5 Application Circuit Reference schematic: +3.3V HRS_U.FL 50 ohm Trace OPEN(10K) U-FL-R-SMT-3P 0 ohm 0 ohm OPEN OPEN Please provide SYSTEM_TXB DC 5V or 3.3V SYSTEM_RXB 5V or 3.3V GPS_RF_IN 50 ohm Trace GPS_PPS 39nH/ +/- 0.3nH...
Page 8
REB-1315LPX Operational Manual Note: (1) Ground Planes: These pin(18、20、21、22) should be connect to ground. (2) Serial Interface: (Ⅰ) The TXA pin is the serial output data. Default output GPS protocol. (NMEA sentence) . (Ⅱ) The RXA pin is the serial input data. Default output GPS protocol. (NMEA sentence) (Ⅲ) The TXB pin is the serial output data (Default Null)
Page 9
REB-1315LPX Operational Manual Recommend Layout PAD : TOP View RoyalTek Confidential...
Page 10
REB-1315LPX Operational Manual Recommend paste mask pad Recommend paste mask pad is shift outside the layout pad 0.2mm(See under figure) Black Block is layout PAD、Blue Block(Gray region is paste mask pad recommend) TOP View RoyalTek Confidential...
Page 13
REB-1315LPX Operational Manual Pin defined: Pin Signal Name I/O Description Characteristics ≥ ≥ 0.3V ≤ ≤ Serial port B ≥ ≥ ≤ Serial port B ≥ ≥ ≤ One pulse per second ≥ ≥ ≤ Serial port A ≥ ≥...
Page 14
REB-1315LPX Operational Manual Bias voltage 18 GND Ground Reference Ground 19 RF_IN GPS Signal @1.57542GHz input 20 GND Ground Reference Ground 21 GND Ground Reference Ground 22 GND Ground Reference Ground VIN_3V3(+3.3V DC power Input) This is the DC power supply input pin for GPS system. It provides voltage to module.
Page 15
REB-1315LPX Operational Manual This pin receives GPS analog signal. The line on the PCB between the antenna(or antenna connector) has to be a controlled impedance line (Microstrip at 50Ω). RF_VOUT This pin can provide maximum power 30mA @2.85V for active antenna.
REB-1315LPX Operational Manual 2. Software Interface NMEA Protocol NMEA Output Messages: the Engine board outputs the following messages as shown in Table 1: Table 1 NMEA-0183 Output Messages NMEA Record Description Global positioning system fixed data GNSS DOP and active satellites...
Page 17
REB-1315LPX Operational Manual Checksum <CR><LF> End of message termination Table 3 Position Fix Indicators Value Description Fix not available or invalid GPS SPS Mode, fix valid Differential GPS, SPS Mode, fix valid Not Supported Dead Reckoning Mode, fix valid GSA-GNSS DOP and Active Satellites Table 4 contains the values of the following example: $GPGSA, A, 3, 07, 02, 26, 27, 09, 04, 15, , , , , , 1.8,1.0,1.5*33...
Page 18
REB-1315LPX Operational Manual Table 6 Mode 2 Value Description Fix not available GSV-GNSS Satellites in View Table 7 contains the values of the following example: $GPGSV, 2, 1, 07, 07, 79, 048, 42, 02, 51, 062, 43, 26, 36, 256, 42, 27, 27, 138, 42*71...
Page 19
REB-1315LPX Operational Manual Table 8 RMC Data Format Name Example Units Description Message ID $GPRMC RMC protocol header UTC Time 161229.487 hhmmss.sss Status A=data valid or V=data not valid Latitude 3723.2475 ddmm.mmmm N/S Indicator N=north or S=south Longitude 12158.3416 dddmm.mmmm...
Page 20
REB-1315LPX Operational Manual <CR><LF> End of message termination GLL-Geographic Position – Latitude/Longitude Table 10 contains the values of the following example: $GPGLL,2503.6319,N,12136.0099,E,053740.000,A,A*52 Table 10 GLL Data Format Name Example Units Description Message ID $GPGLL GLL protocol header Latitude 2503.6319 ddmm.mmmm...
REB-1315LPX Operational Manual 3 GPS Receiver User’s Tip GPS signal will be affected by weather and environment conditions, so it is recommended to use the GPS receiver under less shielding environments to ensure GPS receiver has better receiving performance. When GPS receiver is moving, it will prolong the time to fix the position, so it is recommended to wait for the satellite signals locked at a fixed point when first power-on the GPS receiver to ensure to lock the GPS signal at the shortest time.
REB-1315LPX Operational Manual 4. Package Specification and Order Information Shipment Method: Tape and reel SMT type with stamp holes (22 holes) 5. Matching active antenna (The same as REB-1315LP) Model RTK P/N Picture REB-1315LPN/LPNX ZANTEN1257G ZANTEN1241G REB-1315LP/LPX ZANTEN1229G ZANTEN1263G RoyalTek Confidential...
Need help?
Do you have a question about the REB-1315LPX and is the answer not in the manual?
Questions and answers