LS20030~3_datasheet Ls20030 3 Datasheet V10

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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
ßwww.locosystech.com

Product name

Description

LS20030

GPS smart antenna module/USB,9600BPS,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

1.0

Datasheet of GPS smart antenna module, LS20030~3

Introduction
LS20030~3 series products are complete GPS smart antenna receivers, including an
embedded antenna and GPS receiver circuits, designed for a broad spectrum of OEM system
applications. The product is based on the proven technology found in LOCOSYS 32 channel GPS
SMD type receivers MC-1513 that use MediaTek chip solution. The GPS smart antenna will track up
to 32 satellites at a time while providing fast time-to-first-fix, one-second navigation update and low
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 car
navigation as well as other location-based applications.

Features
z
z

MediaTek MT3318 solution
Support 32-channel GPS

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
ßwww.locosystech.com

z
z
z
z

Fast TTFF at low signal level
Up to 5 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
z
z
z

Personal positioning and navigation
Automotive navigation
Marine navigation

GPS antenna

MC-1513
GPS module

USB bridge

Micro battery

Fig 3-1 System block diagram of LS20030

GPS antenna

MC-1513
GPS module

TTL level
Host

Micro battery

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
ßwww.locosystech.com

GPS antenna

MC-1513
GPS module

RS232
transceiver

Micro battery

Fig 3-3 System block diagram of LS20032

Fig 3-4 System block diagram of LS20033

GPS receiver
Chip

MediaTek MT3318

Frequency

L1 1575.42MHz, C/A code

Channels

Support 32 channels

Update rate

1Hz default, up to 5Hz

Acquisition Time

Position Accuracy

Hot start (Open Sky)

2s (typical)

Cold Start (Open Sky)

36s (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
ßwww.locosystech.com

Protocol Support

9600 bps, 8 data bits, no parity, 1 stop bits (default)

NMEA 0183 ver 3.01

1Hz: GGA, GLL, GSA, GSV, RMC, VTG

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,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

Name

Example

Message ID

$GPGGA

GGA protocol header

UTC Time

053740.000

hhmmss.sss

Latitude

2503.6319

ddmm.mmmm

N/S indicator

N=north or S=south

Longitude

12136.0099

dddmm.mmmm

E/W Indicator

E=east or W=west

Position Fix Indicator

See Table 5.1-3

Satellites Used

Range 0 to 12

HDOP

1.1

Horizontal Dilution of Precision

MSL Altitude

63.8

mters

Units

mters

Geoid Separation

15.2

mters

Units

mters

Age of Diff. Corr.

second

Diff. Ref. Station ID

0000

Checksum

*64

Units

Description

Null fields when DGPS is not used

End of message termination

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
ßwww.locosystech.com
Table 5.1-3 Position Fix Indicators

Value

Description

Fix not available or invalid

GPS SPS Mode, fix valid

Differential GPS, SPS Mode, fix valid

3-5

Not supported

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

Name

Example

Units

Message ID

$GPGLL

GLL protocol header

Latitude

2503.6319

ddmm.mmmm

N/S indicator

N=north or S=south

Longitude

12136.0099

dddmm.mmmm

E/W indicator

E=east or W=west

UTC Time

053740.000

hhmmss.sss

Status

A=data valid or V=data not valid

Mode

A=autonomous, D=DGPS, E=DR

Checksum

*52

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

Name

Example

Units

Description

Message ID

$GPGSA

GSA protocol header

Mode 1

See Table 5.1-6

Mode 2

See Table 5.1-7

ID of satellite used

Sv on Channel 1

ID of satellite used

Sv on Channel 2

….

ID of satellite used

Sv on Channel 12

PDOP

2.0

Position Dilution of Precision

Page 5/13
© 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
ßwww.locosystech.com

HDOP

1.1

Horizontal Dilution of Precision

VDOP

1.7

Vertical Dilution of Precision

Checksum

*35

End of message termination

Table 5.1-6 Mode 1

Value

Description

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

Automatic-allowed to automatically switch 2D/3D

Table 5.1-7 Mode 2

Value

Description

Fix not available

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

Example

Name
Message ID

Units

Description

$GPGSV

GSV protocol header

Range 1 to 3

Message number1

Range 1 to 3

Satellites in view

Satellite ID

Elevation

degrees

Channel 1 (Range 00 to 90)

Azimuth

285

degrees

Channel 1 (Range 000 to 359)

SNR (C/No)

dB-Hz

Channel 1 (Range 00 to 99, null when not tracking)

Satellite ID

Elevation

degrees

Channel 4 (Range 00 to 90)

Azimuth

077

degrees

Channel 4 (Range 000 to 359)

SNR (C/No)

dB-Hz

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

Checksum

*73

Total number of messages

Channel 1 (Range 01 to 32)

Channel 4 (Range 01 to 32)

End of message termination

1. Depending on the number of satellites tracked multiple messages of GSV data may be required.

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
ßwww.locosystech.com

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

Name

Example

Units

Message ID

$GPRMC

RMC protocol header

UTC Time

053740.000

hhmmss.sss

Status

A=data valid or V=data not valid

Latitude

2503.6319

ddmm.mmmm

N/S Indicator

N=north or S=south

Longitude

12136.0099

dddmm.mmmm

E/W Indicator

E=east or W=west

Speed over ground

2.69

knots

Course over ground

79.65

degrees

Date

100106

True

ddmmyy

degrees

Magnetic variation
Variation sense

E=east or W=west (Not shown)

Mode

Checksum

*53

A=autonomous, D=DGPS, E=DR

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

Name

Example

Message ID

$GPVTG

Course over ground

79.65

Reference

Units

VTG protocol header

degrees

Measured heading
True

degrees

Course over ground

Description

Measured heading

Reference

Magnetic

Speed over ground

2.69

Units

Speed over ground

5.0

Units

Kilometer per hour

Mode

A=autonomous, D=DGPS, E=DR

Checksum

*38

knots

Measured speed
Knots

km/hr

Measured speed

Page 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
ßwww.locosystech.com

End of message termination

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

LED 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

Pin assignment and descriptions

Fig 7.1 Pin assignment of LS20030, LS20031 and LS20032

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
ßwww.locosystech.com

Fig 7.2 Pin assignment of LS20033
z

LS20030
Pin # Name

VBUS

D-

D- line

D+

D+ line

GND

Ground

Shield

Ground

USB power input

Type Description

VCC

Power input

Data input (TTL level)

Data output (TTL level)

GND

Ground

GND

Ground

LS20032
Pin # Name

LS20031
Pin # Name

Type Description

VCC

Power input

Data input (RS232 level)

Data output (RS232 level)

GND

Ground

GND

Ground

LS20033
Pin # Name

Type Description

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
ßwww.locosystech.com

VCC

Power input

GND

Ground

Data output (TTL level)

Data input (TTL level)

GPS LED

LED indicator. See Fig 6.1

VBACKUP

Backup battery supply voltage

DC & Temperature characteristics
8.1 DC Electrical characteristics
Parameter

Input voltage

Symbol

Product

Min.

Typ.

Max.

Units

VCC

LS20030
LS20031
LS20032
LS20033

4.75
3
4
3

5
3.3
5
3.3

5.25
4.2
6
4.2

LS20033

1.1

6.0

Input Backup Battery Voltage VBACKUP

Input current

High Level Input Voltage

Icc

VI H

(1)

LS20030
LS20031
LS20032
LS20033

47
41(1)
46(1)
44(1)

LS20031
LS20033

2.0

3.6

Low Level Input Voltage

VI L

LS20031
LS20033

-0.3

0.8

High Level Input Current

IIH

LS20031
LS20033

-1

Low Level Input Current

IIL

LS20031
LS20033

-1

High Level Output Voltage

VOH

LS20031
LS20033

2.4

Low Level Output Voltage

VOL

LS20031
LS20033

High Level Output Current

IOH

LS20031
LS20033

Low Level Output Current

IOL

LS20031
LS20033

V
V
uA
uA
V

0.4

V
mA
mA

Measured in several seconds after position fix is available and tracked GPS signals are equal to or more than 6. If
GPS almanac data was fully received and GPS satellites are stable, this value may reduce 8mA.

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
ßwww.locosystech.com

8.2 Temperature characteristics
Parameter

Symbol

Operating Temperature

Topr

Storage Temperature

Tstg

Product

Min.

Typ.

Max.

LS20030~LS20032

-30

LS20033

-20

LS20030~LS20032

-40

LS20033

-30

Units
℃
℃

Mechanical specification
z

LS20030, LS20031, LS20032

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
ßwww.locosystech.com

LS20033

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

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
ßwww.locosystech.com

Document change list
Revision 1.0
z

First release on Oct. 25, 2007.

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LS20030~3_datasheet Ls20030 3 Datasheet V10

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