LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi City, Taipei County 221, Taiwan℡ 886-2-8698-3698
 886-2-8698-3699
www.locosystech.com

Product nameDescription

LS20030

GPS smart antenna module/USB,VCP,30x30mm

LS20031

GPS smart antenna module/TTL,9600BPS,30x30mm

LS20032

GPS smart antenna module/RS232,9600BPS,30x30mm

LS20033

GPS smart antenna module/TTL,9600BPS,35x16mm

Version

1.2

Datasheet of GPS smart antenna module, LS20030~3?

1Introduction
LS20030~3 series products are complete GPS smart antenna receivers, including anembedded antenna and GPS receiver circuits, designed for a broad spectrum of OEM systemapplications. The product is based on the proven technology found in LOCOSYS 66 channel GPS
SMD type receivers MC-1513 that use MediaTek chip solution. The GPS smart antenna will acquire
up to 66 satellites at a time while providing fast time-to-first-fix, one-second navigation update andlow power consumption. It can provide you with superior sensitivity and performance even in urban canyon
and dense foliage environment. Its far-reaching capability meets the sensitivity requirements of carnavigation as well as other location-based applications.

2FeaturesMediaTek high sensitivity solution
Support 66-channel GPS
Fast TTFF at low signal level
Support AGPS
Page 1/13© 2006 LOCOSYS Technology Inc.

LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi City, Taipei County 221, Taiwan℡ 886-2-8698-3698
 886-2-8698-3699
www.locosystech.com






3

Up to 10 Hz update rate
Capable of SBAS (WAAS, EGNOS, MSAS)
Build-in micro battery to reserve system data for rapid satellite acquisition (not in LS20033)
LED indicator for GPS fix or not fix (not in LS20033)

Application

Personal positioning and navigation
Automotive navigation
Marine navigation

Fig 3-1 System block diagram of LS20030

Fig 3-2 System block diagram of LS20031

Page 2/13© 2006 LOCOSYS Technology Inc.

LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi City, Taipei County 221, Taiwan℡ 886-2-8698-3698
 886-2-8698-3699
www.locosystech.com

Fig 3-3 System block diagram of LS20032

Fig 3-4 System block diagram of LS20033

4GPS receiverChipMediaTek MT3329

Frequency

L1 1575.42MHz, C/A code

Channels

Support 66 channels (22 Tracking, 66 Acquisition)

Update rate

1Hz default, up to 10Hz

Acquisition Time

Position Accuracy

Hot start (Open Sky)< 2s (typical)

Cold Start (Open Sky)

35s (typical)

Autonomous

3m (2D RMS)

SBAS

2.5m (depends on accuracy of correction data)

Datum

WGS-84 (default)

Max. Altitude< 18,000 m

Max. Velocity< 515 m/s

Page 3/13© 2006 LOCOSYS Technology Inc.

LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi City, Taipei County 221, Taiwan℡ 886-2-8698-3698
 886-2-8698-3699
www.locosystech.com

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: LS20030 is a USB device with virtual COM port (VCP). That is the application software can access LS20030
with any baud rate.

5

Software interface
5.1 NMEA output message
Table 5.1-1 NMEA output message

NMEA recordDescription

GGA

Global positioning system fixed dataGLL

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,053740.000,2503.6319,N,12136.0099,E,1,08,1.1,63.8,M,15.2,M,,0000*64

Table5.1- 2 GGA Data Format

NameExample

Message ID$GPGGAGGA protocol header

UTC Time

053740.000

hhmmss.sss

Latitude2503.6319

ddmm.mmmm

N/S indicator

N

N=north or S=southLongitude

12136.0099

dddmm.mmmm

E/W Indicator

EE=east or W=west

Position Fix Indicator

1

See Table 5.1-3

Satellites Used

08

Range 0 to 12

HDOP

1.1

Horizontal Dilution of Precision

MSL Altitude

63.8

mters

Units

M

mters

Geoid Separation

15.2

mters

Units

M

mters

Age of Diff. Corr.

Units

secondDiff. Ref. Station ID

0000

Checksum*64

Description

Null fields when DGPS is not used

Page 4/13© 2006 LOCOSYS Technology Inc.

LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi City, Taipei County 221, Taiwan℡ 886-2-8698-3698
 886-2-8698-3699
www.locosystech.com<CR> <LF>

End of message termination

Table 5.1-3 Position Fix Indicators

ValueDescription

0Fix 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,2503.6319,N,12136.0099,E,053740.000,A,A*52

Table 5.1-4 GLL Data Format

NameExample

Units

Message ID$GPGLL

GLL protocol header

Latitude2503.6319

ddmm.mmmm

N/S indicator

N

N=north or S=southLongitude

12136.0099

dddmm.mmmm

E/W indicatorE

E=east or W=west

UTC Time053740.000

hhmmss.sss

StatusA

A=data valid or V=data not valid

Mode

A

A=autonomous, D=DGPS, E=DR

Checksum*52<CR> <LF>

Description

End of message termination

GSA---GNSS DOP and Active Satellites

Table 5.1-5 contains the values for the following example:$GPGSA,A,3,24,07,17,11,28,08,20,04,,,,,2.0,1.1,1.7*35

Table 5.1-5 GSA Data Format

NameExample

Message ID$GPGSA

GSA protocol header

Mode 1A

See Table 5.1-6

Mode 23

See Table 5.1-7

ID of satellite used24

Sv on Channel 1

ID of satellite used07

Sv on Channel 2….

Units

Description….

Page 5/13© 2006 LOCOSYS Technology Inc.

LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
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ID of satellite used

Sv on Channel 12

PDOP2.0

Position Dilution of PrecisionHDOP

1.1

Horizontal Dilution of Precision

VDOP

1.7

Vertical Dilution of Precision

Checksum*35<CR> <LF>

End of message termination

Table 5.1-6 Mode 1

Value

Description

M

Manual- forced to operate in 2D or 3D modeA

Automatic-allowed to automatically switch 2D/3D

Table 5.1-7 Mode 2

Value

Description

1

Fix not available

22D

33D



GSV---GNSS Satellites in View

Table 5.1-8 contains the values for the following example:$GPGSV,3,1,12,28,81,285,42,24,67,302,46,31,54,354,,20,51,077,46*73$GPGSV,3,2,12,17,41,328,45,07,32,315,45,04,31,250,40,11,25,046,41*75$GPGSV,3,3,12,08,22,214,38,27,08,190,16,19,05,092,33,23,04,127,*7B

Table 5.1-8 GSV Data Format

Name

ExampleMessage ID

Units

Description$GPGSV

GSV protocol header

Total number of messages

3

Range 1 to 3

Message number1

1

Range 1 to 3

Satellites in view

12

Satellite ID

28

Elevation81

degrees

Channel 1 (Range 00 to 90)

Azimuth285

degrees

Channel 1 (Range 000 to 359)

SNR (C/No)

42dB-HzChannel 1 (Range 00 to 99, null when not tracking)Satellite ID20Elevation

51

degrees

Channel 4 (Range 00 to 90)

Azimuth077

degrees

Channel 4 (Range 000 to 359)

SNR (C/No)

46

dB-Hz

Channel 4 (Range 00 to 99, null when not tracking)

Checksum*73

1<CR> <LF>

Channel 1 (Range 01 to 32)

Channel 4 (Range 01 to 32)

End of message termination

Page 6/13© 2006 LOCOSYS Technology Inc.

LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi City, Taipei County 221, Taiwan℡ 886-2-8698-3698
 886-2-8698-3699
www.locosystech.com

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,053740.000,A,2503.6319,N,12136.0099,E,2.69,79.65,100106,,,A*53

Table 5.1-9 RMC Data Format

NameExample

Units

Message ID$GPRMCRMC protocol header

UTC Time

053740.000

hhmmss.sss

StatusA

A=data valid or V=data not valid

Latitude2503.6319

ddmm.mmmm

N/S Indicator

N

N=north or S=southLongitude

12136.0099

dddmm.mmmm

E/W IndicatorE

E=east or W=west

Speed over ground

2.69

knots

Course over ground79.65

degrees

Date100106

Trueddmmyy

degrees

Magnetic variation
Variation sense

E=east or W=west (Not shown)

ModeA

Checksum*53

A=autonomous, D=DGPS, E=DR

<CR> <LF>

Description

End of message termination

VTG---Course Over Ground and Ground Speed

Table 5.1-10 contains the values for the following example:$GPVTG,79.65,T,,M,2.69,N,5.0,K,A*38

Table 5.1-10 VTG Data Format

NameExample

Message ID$GPVTG

Course over ground

79.65

Reference

T

Units

VTG protocol header

degrees

ReferenceM

Speed over ground

2.69

Units

NSpeed over ground

5.0

Units

K

Measured heading
Truedegrees

Course over ground

Description

Measured heading
Magneticknots

Measured speed
Knots

km/hr

Measured speed
Kilometer per hourPage 7/13© 2006 LOCOSYS Technology Inc.

LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi City, Taipei County 221, Taiwan℡ 886-2-8698-3698
 886-2-8698-3699
www.locosystech.com

ModeA

Checksum*38

A=autonomous, D=DGPS, E=DR

<CR> <LF>

End of message termination

5.2 Proprietary NMEA input message
Please refer to MTK proprietary message.

6LED indicator
The red LED is an indicator of GPS positioning status. In continuous power mode, it flashes once

per second when position is fixed. Otherwise it is off. The timing in detail is as below.

Fig 6.1 LED indicator of GPS positioning status

7

Pin assignment and descriptions

Fig 7.1 Pin assignment of LS20030, LS20031 and LS20032
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LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
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 886-2-8698-3699
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Fig 7.2 Pin assignment of LS20033
LS20030
Pin # Name

1

VBUS

2D-D- line3

D+D+ line

4

GND

P

Ground5Shield

PGroundUSB power input

Type Description

1VCC

P

Power input

2RXI

Data input (TTL level)

3TX

O

Data output (TTL level)

4

GND

P

Ground5

GND

P

GroundLS20032
Pin # NamePLS20031
Pin # Name

Type Description

Type Description

1VCCP

Power input

2RXI

Data input (RS232 level)

3TX

O

Data output (RS232 level)

4

GND

P

Ground5GND

PGroundLS20033

Page 9/13© 2006 LOCOSYS Technology Inc.

LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
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 886-2-8698-3699
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Pin # Name

8

Type Description

1

VCC

P

Power input

2

GND

P

Ground3

TX

O

Data output (TTL level)

4RXI

Data input (TTL level)

5GPS LEDO

LED indicator. See Fig 6.1

6VBACKUPP

Backup battery supply voltage

DC & Temperature characteristics
8.1 DC Electrical characteristics
ParameterInput voltage

Symbol

VCC

Input Backup Battery Voltage VBACKUPInput current

High Level Input Voltage

Icc

VI H

ProductMin.

Typ.

Max.

LS20030

4.75
345
3.3
5
3.3

5.25
4.2
6

LS20031LS20032
LS20033
LS2003332

LS20031LS20032
LS20033

29(1)
34(1)
32(1)

VmA

LS20031LS200332.0

3.6

LS20031LS20033

-0.3

0.8-1

11

Low Level Input Voltage

VI L

High Level Input Current

IIH

Low Level Input Current

IIL

LS20031LS20033-1

High Level Output Voltage

VOH

LS20031LS20033

2.4

Low Level Output Voltage

VOL

LS20031LS20033

High Level Output Current

IOH

LS20031LS20033

2Low Level Output Current

IOL

LS20031LS20033

21.

4.2
4.3

29

LS20033

V(1)

LS20030

LS20031

Units

VV
uAuA
V
V

0.4

mA
mA

Measured when position fix is available and input voltage is 3.3V. This value may vary with short period test.

Page 10/13© 2006 LOCOSYS Technology Inc.

LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
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 886-2-8698-3699
www.locosystech.com

8.2 Temperature characteristics

9ParameterSymbol

ProductMin.

Typ.

Max.

Operating Temperature

Topr

LS20030~LS20033-30-85Units℃

Storage Temperature

Tstg

LS20030~LS20033

-40

2585℃

Mechanical specification
LS20030, LS20031, LS20032

Page 11/13© 2006 LOCOSYS Technology Inc.

LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi City, Taipei County 221, Taiwan℡ 886-2-8698-3698
 886-2-8698-3699
www.locosystech.com

LS20033

The 6-pin connector is belonging to Wafer series connector and its pitch is 1.0mm. There is asupplier called Cherng Weei Technology Corp. http://www.cwe.com.tw and its part number is
CSH-W10R-06TR for you reference.

Page 12/13© 2006 LOCOSYS Technology Inc.

LOCOSYS Technology Inc.
20F.-13, No.79, Sec. 1, Xintai 5th Rd.,
Xizhi City, Taipei County 221, Taiwan℡ 886-2-8698-3698
 886-2-8698-3699
www.locosystech.com

Document change list
Revision 1.0
First release on Oct. 25, 2007.

Revision 1.0 to Revision 1.1 (July 20, 2009)Changed GPS chip from MT3318 to MT3329 on page 3. The units with date code after 0924
(on MC-1513) will be changed to new chip.

Changed the picture of LS20033 on page 1.
Added “Support AGPS” on page 1.
Changed Fig 3-1 on page 2.
Changed channels from 32 to 66 on page 3

Changed update rate from “up to 5Hz” to “up to 10Hz” on page 3.
Changed hot start time from “2s (typical)” to “<2s (typical)” on page 3.

Changed cold start time from 36s to 35s on page 3.
Added “Note 1” on page 4.
Changed Input Battery Backup Voltage from “1.1V~6.0V” to “2.0V~4.3V” on page 10.






Changed typical current of LS20030 from 47mA to 29mA on page 10.
Changed typical current of LS20031 from 41mA to 29mA on page 10.
Changed typical current of LS20032 from 46mA to 34mA on page 10.
Changed typical current of LS20033 from 44mA to 32mA on page 10.
Changed operation temperature of LS20033 from “-20 ~ 65℃” to “-30 ~ 85℃” on page 11.
Changed storage temperature of LS20033 from “-30 ~ 75℃” to “-40 ~ 85℃” on page 11.

Revision 1.1 to Revision 1.2 (July 28, 2009)


Changed the picture of LS20030 on page 1.

Page 13/13© 2006 LOCOSYS Technology Inc.