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LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
1
Product name
Description
Version
ST-1612-G
Datasheet of ST-1612-G multiple GNSS module
1.1
Introduction
LOCOSYS ST-1612-G module can simultaneously acquire and track multiple satellite constellations that
include GPS, GLONASS, GALILEO and QZSS. It features high sensitivity, low power and ultra small form
factor. This multiple GNSS module is powered by ST, it can provide you with superior sensitivity and
performance even in urban canyon and dense foliage environment.
2
Features
3
ST high sensitivity solution
Support GPS, GLONASS, GALILEO and QZSS
Capable of SBAS (WAAS, EGNOS, MSAS)
32 tracking channels and 2 fast acquisition channels
Low power consumption
Fast TTFF at low signal level
Support interface of UART, USB and CAN bus
Small form factor 16 x 12.2 x 2.2 mm
SMD type with stamp holes; RoHS compliant
Application
Personal positioning and navigation
Automotive navigation
Marine navigation
Fig 3-1 System block diagram.
Page 1/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
Fig 3-2 Typical application circuit that uses a passive antenna.
GPS active
antenna
3.3V
LNA
13
14
15
16
17
VCC
GND
Micro processor
RX
TX
18
19
20
21
22
23
24
1.62V~3.6V
LDO
Output 3.3V
12
GND
11
RF_IN
10
GND
9
VCC_RF
8
NC
GND
NC
NC
NC
NC
CANTX
CANRX
TX
RX
V_BCKP
VCC
GND
27nH or
BEAD
10
Ω
7
VDDUSB
6
USB_DP
5
USB_DM
4
WAKEUP
3
TIMEPULSE
2
NC
1
NC
ST-1612-G
Fig 3-3 Typical application circuit that uses an active antenna.
Page 2/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
Fig 3-4 Typical application circuit that uses USB interface.
Page 3/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
Fig 3-4 Typical application circuit that has supervisor of the external active antenna.
Page 4/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
4
GNSS receiver
4.1 GNSS receiver
Chip
STA8088FG series
Frequency
GPS, GALILEO, QZSS: L1 1575.42MHz, C/A code
GLONASS: L1 1598.0625MHz ~ 1605.375MHz, C/A code
Channels
Support 32 channels
Update rate
1Hz default, up to 10Hz.
Sensitivity
Acquisition Time
Position Accuracy
Tracking
up to -161dBm (with external LNA)
Cold start
up to -147dBm (with external LNA)
Cold Start (Open Sky)
32s (typical)
Autonomous
1.5m CEP
SBAS
1.5m (depends on accuracy of correction data).
Max. Altitude
< 50,000 m
Max. Velocity
< 515 m/s
Protocol Support
9600 bps(1), 8 data bits, no parity, 1 stop bits (default)
NMEA 0183 ver 3.01
1Hz: GGA, GLL, GSA, GSV, RMC, VTG
Note 1: Both baud rate and output message rate are configurable to be factory default.
5
Software interface
5.1 NMEA output message
Table 5.1-1 NMEA output message
NMEA record
Description
GGA
Global positioning system fixed data
GLL
Geographic position - latitude/longitude
GSA
GNSS DOP and active satellites
GSV
GNSS satellites in view
RMC
Recommended minimum specific GNSS data
VTG
Course over ground and ground speed
GGA--- Global Positioning System Fixed Data
Table 5.1-2 contains the values for the following example:
$GPGGA,021754.000,2503.71314,N,12138.74545,E,2,19,0.5,120.50,M,15.3,M,,*6C
Table5.1- 2 GGA Data Format
Name
Example
Units
Description
Message ID
$GPGGA
GGA protocol header
UTC Time
021754.000
hhmmss.sss
Latitude
2503.71314
ddmm.mmmm
Page 5/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
N/S indicator
N
N=north or S=south
Longitude
12138.74545
dddmm.mmmm
E/W Indicator
E
E=east or W=west
Position Fix Indicator
2
See Table 5.1-3
Satellites Used
19
Range 0 to 12
HDOP
0.5
Horizontal Dilution of Precision
MSL Altitude
120.50
mters
Units
M
mters
Geoid Separation
15.3
mters
Units
M
mters
Age of Diff. Corr.
second
Null fields when DGPS is not used
Diff. Ref. Station ID
Checksum
*6C
<CR> <LF>
End of message termination
Table 5.1-3 Position Fix Indicators
Value
Description
0
Fix not available or invalid
1
GPS SPS Mode, fix valid
2
Differential GPS, SPS Mode, fix valid
3-5
Not supported
6
Dead Reckoning Mode, fix valid
GLL--- Geographic Position – Latitude/Longitude
Table 5.1-4 contains the values for the following example:
$GPGLL,2503.71314,N,12138.74545,E,021754.000,A,D*53
Table 5.1-4 GLL Data Format
Name
Example
Units
Description
Message ID
$GPGLL
GLL protocol header
Latitude
2503.71314
ddmm.mmmm
N/S indicator
N
N=north or S=south
Longitude
12138.74545
dddmm.mmmm
E/W indicator
E
E=east or W=west
UTC Time
021754.000
hhmmss.sss
Status
A
A=data valid or V=data not valid
Mode
D
A=autonomous, D=DGPS, E=DR, N=Data not valid,
R=Coarse Position, S=Simulator
Page 6/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
Checksum
*53
<CR> <LF>
End of message termination
GSA---GNSS DOP and Active Satellites
Table 5.1-5 contains the values for the following example:
$GNGSA,A,3,20,06,16,31,29,23,32,14,21,30,03,,1.1,0.5,1.0*24
$GNGSA,A,3,73,80,74,70,71,82,72,,,,,,1.1,0.5,1.0*29
$GNGSA,A,3,193,,,,,,,,,,,,1.1,0.5,1.0*13
Table 5.1-5 GSA Data Format
Name
Example
Units
Description
Message ID
$GNGSA
GSA protocol header
Mode 1
A
See Table 5.1-6
Mode 2
3
See Table 5.1-7
ID of satellite used
20
Sv on Channel 1
ID of satellite used
06
Sv on Channel 2
….
….
ID of satellite used
Sv on Channel 12
PDOP
1.1
Position Dilution of Precision
HDOP
0.5
Horizontal Dilution of Precision
VDOP
1.0
Vertical Dilution of Precision
Checksum
*24
<CR> <LF>
End of message termination
Table 5.1-6 Mode 1
Value
Description
M
Manual- forced to operate in 2D or 3D mode
A
Automatic-allowed to automatically switch 2D/3D
Table 5.1-7 Mode 2
Value
Description
1
Fix not available
2
2D
3
3D
GSV---GNSS Satellites in View
Table 5.1-8 contains the values for the following example:
$GNGSV,5,1,20,03,33,200,40,06,47,184,44,14,25,148,40,16,56,284,42*6B
$GNGSV,5,2,20,20,14,275,36,21,06,097,36,23,20,320,41,29,10,039,38*62
$GNGSV,5,3,20,30,60,344,46,31,48,054,47,32,26,250,36,74,26,325,45*6E
Page 7/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
$GNGSV,5,4,20,82,09,029,37,73,38,025,46,70,07,191,40,80,13,075,43*60
$GNGSV,5,5,20,71,31,238,37,72,24,298,36,50,50,134,37,193,00,000,37*54
Table 5.1-8 GSV Data Format
Name
Example
Message ID
$GNGSV
Units
GSV protocol header
Total number of messages1 5
Message number
1
Description
Range 1 to 8
1
Range 1 to 8
Satellites in view
20
Satellite ID
03
Elevation
33
degrees
Channel 1 (Range 00 to 90)
Azimuth
200
degrees
Channel 1 (Range 000 to 359)
SNR (C/No)
40
dB-Hz
Channel 1 (Range 00 to 99, null when not tracking)
Satellite ID
06
Elevation
47
degrees
Channel 4 (Range 00 to 90)
Azimuth
184
degrees
Channel 4 (Range 000 to 359)
SNR (C/No)
44
dB-Hz
Channel 4 (Range 00 to 99, null when not tracking)
Checksum
*6B
Channel 1 (Range 01 to 196)
Channel 4 (Range 01 to 32)
<CR> <LF>
End of message termination
1. Depending on the number of satellites tracked multiple messages of GSV data may be required.
RMC---Recommended Minimum Specific GNSS Data
Table 5.1-9 contains the values for the following example:
$GPRMC,021754.000,A,2503.71314,N,12138.74545,E,0.0,0.0,300712,,,D*63
Table 5.1-9 RMC Data Format
Name
Example
Message ID
$GPRMC
RMC protocol header
UTC Time
021754.000
hhmmss.sss
Status
A
A=data valid or V=data not valid
Latitude
2503.71314
ddmm.mmmm
N/S Indicator
N
N=north or S=south
Longitude
12138.74545
dddmm.mmmm
E/W Indicator
E
E=east or W=west
Speed over ground
0.0
knots
Course over ground
0.0
degrees
Date
300712
Magnetic variation
Variation sense
Units
Description
True
ddmmyy
degrees
E=east or W=west (Not shown)
Page 8/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
Mode
D
Checksum
*63
A=autonomous, D=DGPS, E=DR, N=Data not valid,
R=Coarse Position, S=Simulator
<CR> <LF>
End of message termination
VTG---Course Over Ground and Ground Speed
Table 5.1-10 contains the values for the following example:
$GPVTG,0.0,T,,M,0.0,N,0.0,K,D*08
Table 5.1-10 VTG Data Format
Name
Example
Message ID
$GPVTG
Course over ground
0.0
Reference
T
Units
VTG protocol header
degrees
Reference
M
Speed over ground
0.0
Units
N
Speed over ground
0.0
Units
K
Mode
D
Checksum
*08
Measured heading
True
degrees
Course over ground
Description
Measured heading
Magnetic
knots
Measured speed
Knots
km/hr
Measured speed
Kilometer per hour
A=autonomous, D=DGPS, E=DR, N=Data not valid,
R=Coarse Position, S=Simulator
<CR> <LF>
End of message termination
5.2 Proprietary NMEA input/output message
Please refer to ST proprietary message.
Page 9/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
6
Pin assignment and descriptions
Table 6-1 Pin descriptions
Pin # Name
Type Description
1
NC
Not connected
2
NC
Not connected
3
TIMEPULSE
4
WAKEUP
O
Time pulse (1PPS, default 100 ms pulse/sec)
I
Wakeup from standby mode (1.2V I/O voltage). Internal
10K ohm pull-down resistor. If this pin is not used, leave it
Note
floating.
5
USB_DM
I/O USB data (D-)
6
USB_DP
I/O
7
VDDUSB/
VDDCAN
8
NC
9
VCC_RF
O
Output voltage for active antenna
10
GND
P
Ground
11
RF_IN
I
GPS RF signal input
12
GND
P
Ground
P
USB data (D+). Connect a 1.5K ohm resistor between
USB_DP and VDDUSB.
Supply voltage of USB transceiver or CAN bus (3V~3.6V)
1
Not connected
2
Page 10/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
13
GND
P
Ground
14
NC
Not connected
15
NC
Not connected
16
NC
Not connected
17
NC
Not connected
18
CANTX
O
CAN bus transmit data output
19
CANRX
I
CAN bus receive data input
20
TX
O
Serial output (Default NMEA)
21
RX
I
Serial input (Default NMEA)
22
V_BCKP
P
23
VCC
P
DC supply voltage
24
GND
P
Ground
Backup battery supply voltage
This pin must be powered to enable the module.
<Note>
1.
Supply power 3.0 ~ 3.6V to enable USB/CAN or leave open to disable. The firmware for UART, USB and CAN is
different, please contact us.
2.
VCC_RF does not have short circuit protection.
Page 11/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
7
DC & Temperature characteristics
7.1 Absolute maximum ratings
Parameter
Symbol
Ratings
Units
VCC
3.6
V
Input Backup Battery Voltage
V_BCKP
3.6
V
Operating Temperature Range
Topr
-40 ~ 85
℃
Storage Temperature Range
Tstg
-40 ~ 85
℃
Input Voltage
7.2 DC Electrical characteristics
Parameter
Min.
Typ.
Max.
Units
VCC
3.0
3.3
3.6
V
Input Backup Battery Voltage
V_BCKP
1.62
3.6
V
VCC_RF Output Voltage
VCC_RF
Input Voltage
Symbol
Conditions
VCC
V
VCC = 3.3V,
Supply Current
Iss
w/o active antenna,
Peak
Acquisition
Tracking
70
50(2)
mA
mA
mA
VCC = 0V
69
uA
120
Backup Battery Current
Ibat
High Level Input Voltage
VI H
2.0
3.6
V
Low Level Input Voltage
VI L
-0.3
0.8
V
High Level Output Voltage
VOH
2.6
Low Level Output Voltage
VOL
V
0.4
V
Note 1. Measured when position fix (1Hz) is available and input voltage is 3.3V with UART interface.
7.3 Temperature characteristics
Parameter
Symbol
Min.
Typ.
Max.
Units
Operating Temperature
Topr
-40
-
85
℃
Storage Temperature
Tstg
-40
25
85
℃
Page 12/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
8
Mechanical specification
8.1 Outline dimensions
8.2 Recommended land pattern dimensions
Page 13/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
9
Reel Packing information
Page 14/15
© 2012 LOCOSYS Technology Inc.
LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi Dist., New Taipei City 221, Taiwan
℡ 886-2-8698-3698
886-2-8698-3699
www.locosystech.com/
Document change list
Revision 1.0
First release on Sep. 24, 2012.
Revision 1.1 (October 30, 2012)
Changed the position accuracy from 2.5m CEP to 1.5m CEP on page 5
Revised the tolerance of the pin to board edge from 0.1mm to 0.25mm in the section 8.1
Page 15/15
© 2012 LOCOSYS Technology Inc.
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