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UMTI-08 - GPS Engine Module

CONTENTS

  1. Hardware Specification -2
    1.1 Technical Specification -2
    1.2 Physical Specification -2
    1.3 Recommend PCB Layout -3

  2. Module Pin Assignments and Description Table -3

  3. Electrical Specifications -6
    3.1. Absolute Maximum Ratings -6

  4. Operating Conditions -6

  5. The Block Diagram of Module -7

  6. Application Schematics -8
    6.1 For Active Ant. -8
    6.2 For Patch Ant. -8

  7. NMEA-0183 Output Message -8

  8. Reflow Profile -9

  1. Hardware Specification
    1.1 Technical Specification
    ▪ Chipset SiRF StarⅢ(GSC3f/LP) Chipset
    ▪ Receiver L1( 1575.42MHz), C/A code
    ▪ Channels 20CH
    ▪ Solution Update Rate 1/second
    ▪ Acquisition
    Hot Start < 8 seconds average, TTFF (Open sky)
    Warm Start < 38 seconds average, TTFF ( Open sky)
    Cold Start < 60 seconds average, TTFF ( Open sky),
    ▪ Limits
    Maximum Altitude 18000m
    Maximum Acceleration 4g
    Maximum Velocity 515m/s
    ▪ Power Consumption 〈 75mA (RF Section 36mA + Digital Section 39mA)
    Input voltage : DC 3.3V ± 5%
    ▪ GPS Software : GSW 3 Ver. 3.2.2
    Protocols COM A : NMEA Protocols
    ▪ Serial Port 1 channel – CMOS level
    ▪ Baud Rate 4,800 to 115,200 bps adjustable ( default : 9,600)
    ▪ Firmware Upgrade 4Mbit Flash Memory field programming S/W available
    ▪ Position Accuracy <10m, Without SA imposed (95%)
    ▪ Tracking Sensitivity : -155dBm
    ▪ Datum Standard : WGS-84

1.2 Physical Specification
▪ Size & Volume : 19(w) x 19(d) x 0.8(h)mm

1.3 Recommend PCB Layout

  1. Module Pin Assignments and Description Table

    Pin No. Signal name I/O Description Note
    1 VCC PWR Power Supply Voltage 3.0~5.0V DC Supply input
    2 GND PWR Ground  
    3 FREQXFEL I External CMOS clock source  
    4 TXB O Serial outputs for channel B  
    5 RXB I Serial inputs for channel B  
    6 TIMEMARK I/O 1 pps timemark output  
    7 TXA O Serial outputs for channel A  
    8 RXA I Serial inputs for channel A  
    9 GPIO 14 I/O General Purpose Input Output Leave unconnected if not used
    10 GPIO 4 I/O General Purpose Input Output Leave unconnected if not used
    11 AMP-INTR I/O External interrupt[0] Alternate function is GPIO 10
    12 RF-ON I Power control of RF chip. Leave unconnected if not used
    13 Bootsel I Module Boots Port
    5.0V : Boot ON
    N.C : Boot OFF(Normal)
    Module boots into special debug
    Mode if VCC during reset
    14 GND PWR Ground  
    15 GND PWR Ground  
    16 GND PWR Ground  
    17 GND PWR Ground  
    18 GND PWR Ground  
    19 GND PWR Ground  
    20 GND PWR Ground  
    21 GND PWR Ground  
    22 RF IN I GPS RF Input 50Ω (1.57542GHz)
    23 GND PWR Ground  
    24 V-ANT0 PWR Power supply out of Active antenna  
    25 V-BAT PWR BackupVoltage supply for RTC and SRAM Leave unconnected if not used
    26 WAKE UP OD Wake up from RTC (Open Drain) Leave unconnected if not used
    27 RESET I/O Active low reset Leave unconnected if not used
    28 GPIO0 I/O General Purpose Input Output Leave unconnected if not used
    29 GPIO1 I/O General Purpose Input Output Leave unconnected if not used

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