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GPS/GSM Module GE1316

1. Functional Description

Full self-contained GPS receiver
Fully shielded design

  • High Performance GPS Single Chip

GPS DSP with integrated real time clock (RTC) ARM7EJ-S CPU

  • Built-in 4Mbit program memory, Low noise amplifier, SAW filter, TCXO, regulators (LDO)
  • 66 Acquisition-Channel GPS receiver
  • WASS/EGNOS/MSAS/GAGAN Supported
  • Selectable update rate up to 10Hz (0.1, 0.2 - 1.0 Sec)
  • 2 UART and USB 2.0 output
  • 5 GPIOs
  • Able to external SPI memory for log data.

GPS receiver in a micro-component package

  • Postage stamp type package
  • Fully automatic assembly: Reflow solderable
  • No RF connector
  • Size: 13mm X 16mm X 2.7mm
  • Weight: 1.0 grams

2. Block Diagram

1.2 Block Diagram

3. Output Protocols

Data format: WGS-84 NMEA 0183
Activated message: GGA, GSA, GSV, RMC all with checksum enabled
Signal format: Buad rate:115200, Byte:8, Parity:none, stop bit:1
Up-date rate: 1 sec

4. Input Start Commands

MESSAGE

COMMANDS

FACTORY RESET $PSRF101,0,0,0,000,0,0,12,8*1C
COLD START $PSRF101,0,0,0,000,0,0,12,4*10
WARM START $PSRF101,0,0,0,000,0,0,12,2*16
HOT START $PSRF101,0,0,0,000,0,0,12,1*15

Time To First Fix (TTFF)

a) Cold Start 60sec (typical)
In a 'Cold Start' scenario, the receiver has no knowledge of position, time or the satellite constellation.
The receiver starts to search for signals blindly.
Cold start time is the longest startup for this module

b) Warm Start  40sec (typical)
In a 'Warm Start' scenario, due to a backup battery the receiver knows its last poison,
the approximate time and the constellation almanac.
Thanks to this it can quickly acquire satellites and gat a position fix faster then in 'Cold Start' mode.

c) Hot Start < 1sec (typical)
In a 'Hot Start' scenario, the receiver has been powered off for less then 2 hours since the last valid
navigation solution.

The GPS uses its last Ephemeris data to calculate a position fix.

5. Pin Description

Pin No. Name Pin Description I/O Note
11 VDD Supply Voltage I 3.0V~4.2V
5 VDDRTC Backup BATTERY for RTC and SRAM backup POWER I 1.5~4.2V
1 RFIN GPS signal form antenna I 50Ω (1.57542GHz)
DC_OUT: 2.8V
27,31 RXA Serial Port A I Leave unconnected if not used.
25,30 TXA Serial Port A O Leave unconnected if not used.
18 USB+ USB POWER I Leave unconnected if not used.
DC Input : 3.3V
32 UDP USB DATA PLUSE O Leave unconnected if not used.
34 UDM USB DATA MINUS O Leave unconnected if not used.
16 GPIO GPIO O 3D LED Indication
20 PPS PPS/TXB/LED O Buyer Order option (default :1PPS)
17 RXB Serial Port B I Leave unconnected if not used.
13 RESET RESET I/O Active LOW input reset.
Active LOW open drain output
7 PRG Module boots into flash memory program mode if VCC during reset I Leave unconnected if not used.
Use only factory production
19 NC No Connection    
21 SO External SPI memory to SI O Leave unconnected if not used.
22 SI External SPI memory to SO I Leave unconnected if not used.
23 CS External SPI memory to CS O Leave unconnected if not used.
26 SK External SPI memory to SK O Leave unconnected if not used.
29 NC No Connection    
Other GND     PIN2,3,4,6,8,9,10,12,14,15,24,28,
33,35,36

6. Absolute Maximum Ratings

Parameter Min Max Unit
Power supply voltage(VDD)   4.5 V
Serial port Input pin voltage -0.3 3.0 V
I/O port voltage -0.3 3.0 V
I/O port current   ±20 mA
Storage temperature -40 85 °C

IMPORTANT :
This module is not protected against over voltage, reversed voltage or short current of RFIN port.

7. DC Characteristics( Test Temperature : 25°C VDD = 3.3V)

Parameter Condition
Min.
TYP
Max.
Unit
Operating supply voltage VDD
3.0
3.3
4.5
V
Operating supply ripple voltage VDD    
50
mV
Sustained supply current (ex. : at 3D Fixed) VDD=4.2V
44
45
47
mA
VDD=3.8V
44
45
47
mA
VDD=3.6V
44
45
47
mA
VDD=3.3V
44
45
47
mA
Peak supply current (ex. : at GPS START operation) VDD=3.3V  
47
50
mA
USB+ port power USB+
3.0
3.3
3.6
V
USB section operating current USB+=3.3V
3
4
5
mA
VDDRTC Input voltage VDDRTC
1.5
3.05
4.5
V
Standby "VDDRTC" Backup current VDDRTC=3.0V
5.0
6.5
15
uA
I/O INPUT level High  
1.96
 
3.0
V
Low  
-0.2
 
0.6
V
I/O OUTPUT level High Ioh=2mA
2.4
 
2.8
V
Low Iol=2mA
0.1
 
0.4
V
"RFIN" DC output Voltage 20mA
2.6
 
2.8
V
Private output DC Current
("RFIN" + "GPIO" output)
VDD=4.2V    
30
mA
VDD=3.3V    
40
mA
Operating temperature VDD=3.3V
-40
25
+80
°C

8. AC Characteristics
( Test Temperature : 25°C VCC = 3.3V  RF Input : Conducted )

Parameter
Condition
Min
Typical
Max
Unit
RF_IN Input level      
-40
dBm
RF_IN Input Impedance Fo=1575.42MHz  
50
 
Ω
Tracking Sensitivity (C/N) 3D (C/N avg. 15dB-Hz)  
-164
 
dBm
Re-Tracking Sensitivity (C/N) 3D (C/N avg. 18dB-Hz)  
-155
 

dBm

Cold start Sensitivity (C/N) 3D (SV 9EA in view)  
-148
 
dBm
Cold start time(TTFF) -130 dBm(2D) (SV 9EA)  
50
 
sec
Hot start time -130 dBm(2D) (SV 9EA)  
1
 
sec
Re-acquisition time (5 sec) -130 dBm(3D) (SV 9EA)  
3
 
sec
Re-acquisition time (60 sec) -130 dBm(3D) (SV 9EA)  
3
 
sec
Position error (Latitude, Longitude) -130 dBm(SV 9EA in View)  
10
 
m
Position error (Elevation) -130 dBm(SV 9EA in View)  
50
 
m
Operational Limits Altitude    
18
Km
Velocity    
1,800
Km/h

9. Active Antenna Selection Guide Recommend

Parameter
Condition
Frequency
1575.42MHz
Polarization
RHCP
V.S.W.R
Less than 2.0
Impedance
50Ω
LNA Gain
24dB±2dB
Noise Figure
1.5dB(Max)
Band Attenuation
20dB(Min) @FO±50MHz
Voltage
DC 2.7V(±10%)
Current
20mA(Max)