GPS Module Datasheet

SKYLAB M&C Technology Co., Ltd SKG13BL-Datasheet

GPS Module

Datasheet

Name: Ultra High Sensitivity and Low Power GPS Receiver Module

Model No.: SKG13BL

Version: V3.01

Revision History:

Revision

V1.01

Description

Initial Release to V1.01

V2.03

V3.01

Update set baud rate

Update firmware

Approved

George

George

Sunny

Date

20120703

20141229

20150312

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SKG13BL-DA-001,A/3


General Description

The SKG13BL is a complete GPS module that features with super sensitivity, ultra low power and small form factor. The GPS signal is applied to the antenna input of module, the serial interface output NMEA protocol data or customer protocol data with position, velocity and time information.

It is based on the high performance features of the

MediaTek MT3337 single-chip architecture, Its

–165dBm tracking sensitivity extends positioning coverage into place like urban canyons and dense foliage environment where the GPS cannot fix before. The small form factor and low power consumption make the module easy to integrate into portable device like PNDs, mobile phones, cameras and vehicle navigation systems.

Applications

 LBS (Location Based Service)

 PND (Portable Navigation Device)

 Vehicle navigation system

 Mobile phone

Figure 1: SKG13BL Top View

Features

 Ultra high sensitivity: -165dBm

 Extremely fast TTFF at low signal level



Built-in 12 multi-tone active interference canceller



Ultra low power consumption



±10ns high accuracy time pulse (1PPS)



NMEA Output：GGA,GSA,GSV,RMC,VTG,GLL



Support QZSS

 Advanced Features: Aiding EPO;EASY

 Small form factor: 15x13x2.4m

 RoHS compliant (Lead-free)

Pin Assignment

2

Figure 2: SKG13BL Pin Package

SKG13BL-DA-001,A/3


Pin Description

18

19

20

21

22

14

15

16

17

7

8

9

10

11

12

13

Pin No. Pin name

1

2

RXD1

TXD1

3

4

5

6

PPS

TXD0

RXD0

NC

FIXLED

RESET

NC

GPIO13/EINT1

V_BCKP

VCC

NC

I/O Description

I UART Serial Data Input 1

O UART Serial Data Output 1

O Time pulse Signal

O UART Serial Data Output 0

I UART Serial Data Input 0

O Fixed LED Output

I Module Reset (Active Low Status)

I Reserved

I RTC and backup SRAM power

P Module Power Supply

B115200

B4800

NC

VCC_OUT

GND

RF_IN

GND

GND

GND

I UART0 Baud rate configuration pin

I UART0 Baud rate configuration pin

O VCC power output

G Ground

I GPS Signal Input

G Ground

G Ground

G Ground

Remark

Leave open if not used





Default off.Leave open if not used


Reserved

Operating range: 2.0V to 4.2V

Operating range: 3.0V to 4.2V




50Ω

@1.57542GHz

Interfaces Configuration

Power Supply

Regulated power for the SKG13BL is required. The input voltage Vcc should be 3.0V to 4.2V range, current is no less than 100mA.

Suitable decoupling must be provided by external decoupling circuitry (10uF and 1uF). It can reduce the

Noise from power supply and increase power stability.

Main power supply Vcc current varies according to the processor load and satellite acquisition. Maximum Vcc peak current is about 30 mA during acquisition.

Backup Battery Power

In case of a power failure on pin Vcc, real-time clock and backup RAM are supplied through pin V_BCKP. This enables the SKG13BL GPS Receiver to recover from power failure with either a hot start or a warm start (depending on the duration of Vcc outage). If no Backup Battery is connected, the receiver performs a cold start upon powered up.

Backup Battery Power V_BCKP draws typically 7 uA current in backup state.

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SKG13BL-DA-001,A/3


Reset

The SKG13BL modules include a RESET pin. Driving RESET low activates a hardware reset of the system. RESET is only an input and will not reset external circuitry. At power down the reset is forced when the Vcc drops below

2.7V.

NOTE

If not used, leave RESET not connected (floating).

Antenna

The SKG13BL GPS receiver is designed for supporting the active antenna or passive antenna connected with pin

RF_IN. The gain of active antenna should be no more than 25dB (18~20dB Typical). The maximum noise figure should be no more than 1.5dB and output impedance is at 50 Ohm.

NOTE

With passive antenna keep the cable loss at minimum(<1dB).

UART Ports

UART0 is use for NMEA output and command input, UART1 is use for RTCM input. The UART0 Baud rate can be configured as seen in table below . Default settings in bold.

Baud rate

9600bps

4800bps

115200bps

38400bps

Pin14:B115200

NC

NC

10K pull-down

10K pull-down

Pin15:B4800

NC

10K pull-down

NC

10K pull-down

RF_IN

The transmission line must to be control impedance from RF_IN pin to the antenna or antenna connector of your choice. (Impedance 50Ω)

PPS

A pulse per second (1 PPS) is an electrical signal that very precisely indicates the start of one second. Depending on the source, properly operating PPS signals have an accuracy ranging 10ns. The PPS signals are used for precise timekeeping and time measurement.

Advanced Software Features

AIC_Multi-tone active interference canceller

Because different application (Wi-Fi , GSM/GPRS,3G/4G,Bluetooth )are integrated into navigation system , the harmonic of RF signal will influence the GPS reception , The multi- tone active-interference canceller can reject external RF interference which come from other active components on the main board , to improve the capacity of GPS reception without any needed HW change in the design .SKG12BL can cancel up to 12 independent channel interference continuous wave.

EASY™

The EASY™ is embedded assist system for quick positioning, the GPS engine will calculate and predict

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SKG13BL-DA-001,A/3

SKYLAB M&C Technology Co., Ltd SKG13BL-Datasheet automatically the single emperies ( Max. up to 3 days )when power on ,and save the predict information into the memory , GPS engine will use these information for positioning if no enough information from satellites , so the function will be helpful for positioning and TTFF improvement under indoor or urban condition ,the Backup power

(VBACKUP) is necessary .

Aiding EPO

The Aiding EPO supply the predicated Extended Prediction Orbit data to speed TTFF ,users can download the EPO data to GPS engine from the FTP server by internet or wireless network ,the GPS engine will use the EPO data to assist position calculation when the navigation information of satellites are not enough or weak signal zone .

Performance Specification

Parameter

Receiver Type

Sensitivity

Accuracy

Acquisition Time

Power Consumption

Navigation Data Update Rate

Operational Limits

Specification

L1 frequency band, C/A code, 22 Tracking / 66 Acquisition-Channel

Tracking

Acquisition

Position

Velocity

Timing (PPS)

Cold Start

Warm Start

Hot Start

Re-Acquisition

Tracking

Acquisition

Max 5Hz

Altitude

Velocity

Acceleration

-165dBm Typical

-148dBm Typical

3.0m CEP50 without SA(Typical Open Sky)

0.1m/s without SA

10ns RMS

23s(Typical Open Sky)

23s

1s

<1s

23mA @3.3V Typical

26mA @3.3V

Default 1Hz

Max 18,000m

Max 515m/s

Less than 4g

Electrical Characteristics

Absolute Maximum Rating

Parameter

Power Supply

Power Supply Volt.

Input Pins

Input voltage on any input connection

Backup Battery

RF input power

Symbol

VCC

V

IO

V_BCKP

RF_IN

Min

-0.3

-0.3

-0.3

Max

4.3

3.6

4.3

-40

Units

V

V

V dBm

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SKG13BL-DA-001,A/3


Human Body Model ESD capability RF_IN 2000 V

Machine Model ESD capability RF_IN 100 V

Environment

Storage Temperature Tstg -40 125

°C

Peak Reflow Soldering Temperature <10s Tpeak 260

°C

Humidity 95 %

Note: Absolute maximum ratings are stress ratings only, and functional operation at the maxims is not guaranteed.

Stress beyond the limits specified in this table may affect device reliability or cause permanent damage to the device.

For functional operating conditions, refer to the operating conditions tables as follow.

Operating Conditions

Parameter

Power supply voltage

Backup Battery

Power supply voltage ripple

Supply current, Acquisition

Supply current, Tracking

Supply current, backup state

Symbol Condition Min Typ

Vcc 3 3.3

V_BCKP 2 3.3

Vcc_PP

Icc

Icc

Vcc=3.3V

Vcc=3.3V

Vcc=3.3V

26

23

Ibckp

VCC_OUT Antenna bias supply VCC_OUT

Input high voltage

Input low voltage

Output high voltage

Output low voltage

Operating temperature

V

IH

V

IL

V

OH

V

OL

Topr

Vcc=3.3V

-0.3

2.4

-0.3

-40

2

7

VCC

3.6

0.8

3.1

0.4

85

Max

4.2

4.2

30 uA

V

V

V

V

V

°C

Units

V

V mV mA mA

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SKG13BL-DA-001,A/3


Mechanical Specification

Recommend Layout

1.15

Figure 3: SKG13BL Dimensions

15.0

1.27

2.5

1.0

0.8

0.8

7

Figure 4: SKG13BL Footprint

1.0

13.0

SKG13BL-DA-001,A/3


Reference design schematic

Figure 5: SKG13BL application circuit that use passive antenna

8

Figure 6: SKG13BL application circuit that use active antenna

SKG13BL-DA-001,A/3


Packaging Specification

SKG13BL modules are shipped in reel and with 1000 units per reel. Each tray is ‘dry’ package.

Figure 7: SKG13BL Packaging

Manufacturing Process Recommendations

Figure 8: SKG13BL Typical Leadfree Soldering Profile

Note：The final soldering temperature chosen at the factory depends on additional external factors like choice of soldering paste，size，thickness and properties of the baseboard，etc. Exceeding the maximum soldering temperature in the recommended soldering profile may permanently damage the module.

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SKG13BL-DA-001,A/3


Software Protocol

NMEA 0183 Protocol

The NMEA protocol is an ASCII-based protocol,

Records start with a $ and with carriage return/line feed.

GPS specific messages all start with $GPxxx where xxx

The Skylab SKG13BL supports the following

NMEA-0183 messages: GGA,GLL,GSA,GSV,RMC.

VTG.The module default NMEA-0183 output is set up is a three-letter identifier of the message data that follows. NMEA messages have a checksum, which allows detection of corrupted data transfers.

Table 1: NMEA-0183 Output Messages

NMEA Record Description

GGA

GLL

GSA

GSV

RMC

VTG

GNSS satellites in view

GGA, GLL, GSA, GSV, RMC VTG. , and default baud rate is set up 9600bps.

Global positioning system fixed data

Geographic position—latitude/longitude

GNSS DOP and active satellites

Recommended minimum specific GNSS data

Course over ground and ground speed

Default

Y

Y

Y

Y

Y

Y

GGA-Global Positioning System Fixed Data

This sentence contains the position, time and quality of the navigation fix.

See GGA for Fix Quality, Sats Used, HDOP, Altitude, Geoidal Separation, and DGPS data.

$GPGGA,021514.000,2232.1799,N,11401.1823,E,1,6,1.25,84.0,M,-2.2,M,,*74

Table 2: GGA Data Format

Name

Message ID

UTC Position

Latitude

Example

$GPGGA

021514.000

2232.1799

Units Description

GGA protocol header hhmmss.sss ddmm.mmmm

N/S indicator

Longitude

E/W Indicator

Position Fix Indicator

Satellites Used

HDOP

N

11401.1823

E

1

6

1.25

N=north or S=south dddmm.mmmm

E=east or W=west

See Table 2-1

Range 0 to 12

Horizontal Dilution of Precision

MSL Altitude

AltUnit

GeoSep

GeoSepUnit

Age of Diff.Corr.

Diff.Ref.Station ID

84.0

M

-2.2

M

<Null>

<Null> meters meters meters meters second

Altitude (referenced to the Ellipsoid)

Altitude Unit

Geoidal Separation

Geoidal Separation Unit

Null fields when it is not Used


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SKG13BL-DA-001,A/3


Checksum *74

<CR> <LF>

Table 2-1: Position Fix Indicators

Value

0

Description

Fix not available or invalid

1

2

End of message termination

GPS SPS Mode, fix valid

Differential GPS, SPS Mode, fix valid

3 GPS PPS Mode, fix valid

GLL-Geographic Position

– Latitude/Longitude

This sentence contains the fix latitude and longitude.

$GPGLL,2232.1799,N,11401.1824,E,021513.000,A,A*50

Table 3: GLL Data Format

Name

Message ID

Latitude

Example

$GPGLL

2232.1799

Units

N/S Indicator

Longitude

E/W Indicator

UTC Position

Fix Status

Fix Mode

Checksum

EOL

N

11401.1824

E

021513.000

A

A

*50

<CR> <LF>

GSA-GNSS DOP and Active Satellites

Description

GLL protocol header

ddmm.mmmm

N=north or S=south

dddmm.mmmm

E=east or W=west

hhmmss.sss

A=data valid or V=data not valid

A=autonomous, N = No fix, D=DGPS, E=DR

End of message temination

This sentence contains the mode of operation, type of fix, PRNs of the satellites used in the solution as well as PDOP, HDOP and VDOP.

See GSA for Fix Type, PDOP, and VDOP.

$GPGSA,A,3,26,05,18,15,27,29,,,,,,,1.52,1.25,0.87*0F

Table 3: GSA Data Format

Name

Message

Mode 1

Example

$GPGSA

A

Units Description

GSA protocol header

See Table 3-2

Mode 2

ID of satellite used


…


3

26

05

…

<Null>

See Table 3-1

Sv on Channel 1

Sv on Channel 2

…

Sv on Channel 12 (Null fields when it is not Used)

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SKG13BL-DA-001,A/3


PDOP 1.52 Position Dilution of Precision

HDOP

VDOP

Checksum

<CR> <LF>

1.25

0.87

*0F

Horizontal Dilution of Precision

Vertical Dilution of Precision


Table 3-1: Mode 1

Value

1

2

3

Table 3-2: Mode 2

Value

M

A

Description

Fix not available

2D Fix

3D Fix

Description

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

Automatic-allowed to automatically switch 2D/3D

GSV-GNSS Satellites in View

This sentence contains the PRNs, azimuth, elevation, and signal strength of all satellites in view.

$GPGSV,3,1,12,15,79,333,42,42,50,127,,29,45,263,44,02,36,124,30*7E

$GPGSV,3,2,12,26,36,226,34,05,35,046,22,27,33,161,29,21,16,319,*7D

$GPGSV,3,3,12,10,15,066,31,18,14,285,45,24,12,319,15,08,09,047,18*7E

Table 4: GSV Data Format

Name Example Units Description

Message ID

Number of Message

Message Number

Satellites in View

Satellite ID

Elevation

$GPGSV

3

1

12

15

79 degrees

GSV protocol header

Total number of GSV sentences (Range 1 to 3)

Sentence number of the total (Range 1 to 3)

Number of satellites in view

Channel 1(Range 01 to 32)


Azinmuth

SNR(C/NO)

…

Satellite ID

Elevation

Azimuth

SNR(C/NO)

333

42

02

36

124

30

degrees

dB-Hz

degrees

degrees

dB-Hz


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

…




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

Checksum

<CR> <LF>

*7E


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

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SKG13BL-DA-001,A/3


RMC-Recommended Minimum Specific GNSS Data

This sentence contains the recommended minimum fix information.

See RMC for Fix Status, Fix Mode, Fix Date, Speed, and True Course.

$GPRMC,023345.000,A,2232.1767,N,11401.1953,E,0.18,151.55,100410,,,A*6B

Table 5: RMC Data Format

Name

Message ID

UTS Position

Status

Latitude

N/S Indicator

Example

$GPRMC

023345.000

A

2232.1767

N

Units Description

RMC protocol header

hhmmss.sss

A=data valid or V=data not valid

ddmm.mmmm

N=north or S=south

Longitude

E/W Indicator

Speed Over Ground

Course Over Ground

11401.1953

E

0.18

151.55

Knots

Degrees

Date(UTC)

Magnetic variation

100410

<Null>

Magnetic Variation Direction <Null>

Degrees

Fix Mode

Checksum

<CR> <LF>

A

*6B

dddmm.mmmm

E=east or W=west

1Knots=1.852Km(China)

True Course

ddmmyy


E=east or W=west (Null fields when it is not Used)

A=autonomous, N = No fix, D=DGPS, E=DR


VTG-Course Over Ground and Ground Speed

This sentence contains the course and speed of the navigation solution.

$GPVTG,148.81,T,,M,0.13,N,0.24,K,A*3D

Table 7: VTG Data Format

Name

Message ID

Tcourse

Reference

Mcourse

Reference

Example

$GPVTG

148.81

T

<Null>

M

Units

Degrees

Degrees

Description

VTG protocol header

True Course

T = True

Magnetic Course (Null fields when it is not Used)

M = Magnetic (Null fields when it is not Used)

Speed over ground

Units

Speed over ground

Units

Mode

0.13

N

0.24

K

A

Knots

Km/hr

Nautical Miles per Hour

Knots

in Kilometers per Hour

Kilometer per hour

A=Autonomous, N=No fix, D=DGPS, E=DR

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SKG13BL-DA-001,A/3


Checksum *3D

<CR> <LF> End of message termination EOL

CMD List

CMD TYPE

Hot Restart

Warm Restart

Cold Restart

Full Cold Restart

Set baud rate

CMD Example:

$PMTK101*32<CR><LF>

$PMTK102*31<CR><LF>

$PMTK103*30<CR><LF>

$PMTK104*37<CR><LF>

$PMTK251,baudrate*CRC<CR><LF>

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SKG13BL-DA-001,A/3


Skylab M&C Technology Co., Ltd.

深圳市天工测控技术有限公司

Address:

6 Floor,No.9 Building,Lijincheng Scientific&Technical park,Gongye East Road,Longhua

District,Shenzhen,Guangdong,China

Phone: 86-755 8340 8210（Sales Support）

Phone: 86-755 8340 8130（Technical Support）

Fax: 86-755-8340 8560

E-Mail:

[email protected]

Website:

www.skylab.com.cn

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SKG13BL-DA-001,A/3

GPS Module Datasheet

GPS Module

Datasheet

Name: Ultra High Sensitivity and Low Power GPS Receiver Module

Model No.: SKG13BL

Version: V3.01

Revision History:

EASY™

Aiding EPO

Skylab M&C Technology Co., Ltd.

深圳市天工测控技术有限公司

[email protected]

www.skylab.com.cn

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