RoyalTek RGM-3550LP User Manual

RGM-3550LP User Manual

RGM-3550LP User Manual

Version 1.3

2008/11/19

This document contains information highly confidential to RoyalTek Company

LTD (RoyalTek). It is provided for the sole purpose of the business discussions between supplier and RoyalTek and is covered under the terms of the applicable Non-Disclosure Agreements. Disclosure of this information to other parties is prohibited without the written consent of RoyalTek.

Prepared by RoyalTek Company LTD.

4F, No.188 Wen Hwa 2 nd Rd., Kuei Shan,

Tao Yuan 33383, Taiwan

TEL: 886-3-3960001

FAX: 886-3-3280976

http://www.royaltek.com/contact

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RGM-3550LP User Manual

0. Revision History

Rev Release Date Change Description

1.0 2007/3/26 Initial Draft

1.1 2007/4/30 Current--

Acquisition: 50mA (typical) Tracking: 45mA

(typical)

1.2 2007/5/14 Chipset Sensitivity: -159dBm (tracking)

Cold start: 35 sec@ open sky

Warm start: 35 sec@ open sky

Hot start:1 sec @ open sky

1.3 2008.11.19 Add 25x25x2mm patch antenna drawing

Editor

Amanda Lee

Amanda Lee

Amanda Lee

Amy Liu

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RGM-3550LP User Manual

Content

1. Introduction ...............................................................................................4

5. Mechanical Layout..................................................................................10

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RGM-3550LP User Manual

RoyalTek GPS Module: RGM-3550LP Operational Manual

1. Introduction

RoyalTek RGM-3550LP smart antenna GPS module (patch antenna embedded and external antenna supported) is inherited from RGM-3550, but lower power consumption than RGM-3550. The smart antenna GPS module is powered by SiRF

Star III technology and RoyalTek proprietary navigation algorithm that providing you more stable navigation data.

The 6-pin connector design is the easiest and convenient solution to be embedded in a portable device and receiver like PND, GPS mouse, car holder, personal locator, speed camera detector and vehicle locator. The excellent sensitivity of RGM-3550LP gets the great performance when going though the urban canyon and foliage.

Product Features

— 20 parallel channels.

— -159 dBm high GPS sensitivity.

— Excellent sensitive for urban canyon and foliage environments.

— Operable from 3.3V, average tracking current is [email protected] and average

Acquisition current is 50mA.

— 6 pin Wire-to-Board (WTB) connector type.

— GPS status light output.

— TCXO

— 0.1 second reacquisition time.

— Dimension is 35±0.3(L)x 31±0.3(W)x 8.55/6.55±0.5(H) mm.

— Weight 16.5g.

— NMEA-0183 compliant protocol/custom protocol.

— Enhanced algorithm for navigation stability

— SBAS (WAAS, EGNOS and MSAS) support and the default SBAS is enable

— Lead-Free

— Backup battery (installed)

Product Applications

— Personal Navigation Device including GPS PDA and GPS Handheld

— GPS receiver including GPS mouse and Bluetooth GPS receiver

— Personal positioning and navigation

— Marine

— Timing

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RGM-3550LP User Manual

2. RGM-3550LP Picture and Pin Definition

Pin 1

Pin 6

31

±

0.3 mm 35

±

0.3mm

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RGM-3550LP User Manual

MMCX Switch

Connector

3. RGM-3550LP System Block Diagram

System block diagram description:

„ Patch antenna with 1 Stage LNA

„ 4Mega bits flash memory on chip

„ MMCX External Antenna Supported

„ 6 pin I/O pin (see page 7, Interface pin definition)

GPS Patch Antenna

LNA

SAW

SIRF GSC3F with 4M Flash

RF frontend +Base-band

Processor

6 Pin I/O

External Antenna

TCXO XTAL

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RGM-3550LP User Manual

4. RGM-3550LP Technique Specification

No Function

GPS receiver

1 Chipset

2 Frequency

Specification

SiRF GSC3F/LP single chipset

3 Code

4 Channels 20.

6 Cold start

7 Warm start

8 Hot start

-159dBm (tracking)

35 sec@ open sky

35 sec@ open sky

1 sec @ open sky

9 Reacquisition

9 Position accuracy

10 Maximum altitude

10meters at 2D RMS.

18000 m

12 Trickle power mode

13 Update rate

14 Testability

Duty cycle ≦ 34%. (Variable)

Continuous operation: 1Hz

It shall be able to be tested by SiRF test mode IV and single channel simulator.

It shall store the protocol setup in the SRAM memory. 15 Protocol setup

Interface

16 I/O Pin

Mechanical requirements

17 Dimension

18 Weight

Power consumption

19 Vcc

20 Current

6 pin (see page 7 about pin definition)

35±0.3(L)x 31±0.3(W)x 8.55±0.5(H) mm

≦ 16.5g

DC 3.3 ±5%

Acquisition: 50mA (typical) Tracking: 45mA (typical)

21 Trickle power mode Average current 37mA. (300ms on /700ms off)

22 SRAM backup battery 3.3mAhr Li-Ion rechargeable battery. Battery life at full charge is

≥

7 days.

Environment

23 Operating -40 ~ +85 ℃

(except for SRAM battery backup -20 to +60 degree Celsius)

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RGM-3550LP User Manual

-40 ~ +85 ℃

(except for SRAM battery backup -40 to +60 degree Celsius)

≦ 95% 25 Humidity

Yes

External Antenna RF Input

27 Drive Output Voltage

28 Drive Output Current

2.85V ± 0.5%

30mA (max)

MMCX

Interface Pin definition (VDD=2.85V

±

2%)

1. 2. 3 . 4. 5. 6

Pin # Signal Name I/O Description

1 RX I Serial

Characteristics

V

IH

2 TXA O Serial V

OH

≥

≥

0 .

7 * VDD V

IL

0 .

75 * VDD

≤

V

OL

0 .

3 * VDD

≤

0 .

25 VDD

3 GND G Ground Reference

4 VCC I DC DC +3.3V

±

5%

Voltage input

5

6

GPS Status O

Boot select I

GPS Status

Boot mode

V

OH

V

IH

≥

≥

0

0 .

75 * VDD V

OL

.

7 * VDD V

IL

≤

≤

0 .

25 VDD

0 .

3 * VDD

EXT External External

V

OUT

=

2 .

85 V

±

0 .

5 %

Ant

RFIN

Antenna

RF Input

RF IN Antenna RF

Input I

Out

=

30 mA ( Max )

„ VCC (+3.3V DC power Input)

EXT Ant

RF IN

this is the main DC power supply input pin. It provides voltage to module.

„ GND

Reference Ground Plane of RGM-3550.

„ Boot set this pin to high for programming flash.

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RGM-3550LP User Manual

„ RX

This is the main receiver channel and is used to receive software commands to the board from SIRFdemo software or from user written software.

PS: Pull up if not used.

„ TX

This is the main transmitting channel and is used to output navigation and measurement data to SiRFdemo or user written software.

„ GPS

GPS Status Pin can be connected to a LED to indicate the status of GPS signal

1. Solid: Power ON/ Tracking for Satellite

2. Blinking: 3D Fix Found

GPS status light indicating

Power off LED off

Power on/search for satellite, voltage is high LED solid

3D fix found, voltage is high/low, remain 1

LED blinking second each

VoL:0.71(Max)

VoH: 2.13V(min)

VoH: 2.13V(min) &

VoL:0.71(Max)

„ External Antenna RF Input

This is the MMCX RF Connector for External Active Antenna signal input

External Active Antenna Spec. Suggestion

1.

Drive Output Voltage: V

OUT

2.

Drive Output Current: I

Out

=

=

2 .

85 V

±

0 .

5 %

30 mA ( Max )

3.

LNA Gain: 20~26dB

4.

LNA Noise Figure: <1.5dB

How to use RGM-3550LP in 5V main board

The power supply of RGM-3550LP is 3V. If customer would like use RGM-3550LP in

5V system, RoyalTek suggest customer use linear regulator (from 5V to 3.3V) on customer main board. We could help check the circuit if providing regulator specification.

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25x25x4mm patch antenna

RGM-3550LP User Manual

25x25x2mm patch antenna

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RGM-3550LP User Manual

6. How to Assemble/Fix RGM-3550LP

Below is our recommendation to assemble/fix up RGM-3550LP GPS module on the customer board or device case.

Hole

Hole

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RGM-3550LP User Manual

7. Software Specification and NMEA Protocol

Software Specification

Standard SiRF firmware for SSIII (GSW3 & SiRFLoc 3)

Upload

GPS Firmware

RGM-3550LP [GSW3][SBAS GGA(1), GSA(1), GSV(1),

RMC(1) 9600 GPS Firmware, version 2.1.0.123 (default)

GPS Utility

WAAS

GPS status

A GPS performance diagnostic utility is required

C/NO,

Enable

See GPS status light indicating specification

NMEA V3.0 Protocol

Its output signal level is TTL: 9600bps (default), 8 bit data, 1 stop bit and no parity. It supports the following NMEA-0183

Messages: GGA, GLL, GSA, GSV, RMC and VTG.

NMEA Output Messages: the Engine board outputs the following messages as shown in Table

1:

Table 1 NMEA -0183 Output Messages

NMEA Record

GGA

GLL

GSA

GSV

RMC

Description

Global positioning system fixed data

Geographic position – latitude / longitude

GNSS DOP and active satellites

GNSS satellites in view

Recommended minimum specific GNSS data

VTG Course over ground and ground speed

GGA-Global Positioning System Fixed Data

Table 2 contains the values of the following example:

$GPGGA, 161229.487, 3723.2475, N, 12158.3416, W, 1, 07, 1.0, 9.0, M, , , ,0000*18

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RGM-3550LP User Manual

Table 2 GGA Data Format

Name Example Units Description

Message ID

UTC Position

$GPGGA

161229.487

Latitude 3723.2475

N/S Indicator N

Longitude 12158.3416

E/W Indicator W

GGA protocol header hhmmss.sss

ddmm.mmmm

N=north or S=south

Dddmm.mmmm

E=east or W=west

Position Fix Indicator

Satellites Used

HDOP

MSL Altitude

1

07

1.0

9.0 meters

See Table 2-1

Range 0 to 12

Horizontal Dilution of Precision

Geoid Separation meters

Age of Diff. Corr. second Null fields when DGPS is not used

Diff. Ref. Station ID 0000

Checksum *18

＜ CR ＞＜ LF ＞ End of message termination

Table 3 Position Fix Indicators

Value Description

0 Fix not available or invalid

1

2

GPS SPS Mode, fix valid

Differential GPS, SPS Mode, fix valid

3 GPS PPS Mode, fix valid

GLL-Geographic Position –Latitude/Longitude

Table 3 contains the values of the following

Example: $GPGLL, 3723.2475, N, 12158.3416, W, 161229.487, A*2C

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RGM-3550LP User Manual

Table 3 GLL Data Format

Name Example Units

Message ID $GPGLL

Description

GLL protocol header

Latitude 3723.2475 ddmm.mmmm

N/S Indicator N N=north or S=south

Longitude 12158.3416 Dddmm.mmmm

E/W Indicator W E=east or W=west

UTC Position 161229.487 hhmmss.ss

Status A A=data valid or V=data not valid

Checksum *2C

＜ CR ＞＜ LF ＞ End of message termination

GSA-GNSS DOP and Active Satellites

Table 4 contains the values of the following example:

$GPGSA, A, 3, 07, 02, 26, 27, 09, 04, 15, , , , , , 1.8,1.0,1.5*33

Table 4 GSA Data Format

Name Example Units

Message ID $GPGSA

Description

GSA protocol header

Mode 1

Mode 2

A

3

See Table 4-2

See Table 4-1

Satellite Used

Satellite Used

07

02

Sv on Channel 1

Sv on Channel 2

Satellite Used

PDOP

HDOP

VDOP

1.8

1.0

1.5

Sv on Channel 12

Position Dilution of Precision

Horizontal Dilution of Precision

Vertical Dilution of Precision

Checksum *33

＜ CR ＞＜ LF ＞ End of message termination

Table 4-1 Mode 1

Value Description

1 Fix not available

2 2D

3 3D

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RGM-3550LP User Manual

Table 4-2 Mode 2

Value Description

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

A Automatic-allowed to automatically switch 2D/3D

GSV-GNSS Satellites in View

Table 5 contains the values of the following example:

$GPGSV, 2, 1, 07, 07, 79, 048, 42, 02, 51, 062, 43, 26, 36, 256, 42, 27, 27, 138,

42*71$GPGSV, 2, 2, 07, 09, 23, 313, 42, 04, 19, 159, 41, 15, 12, 041, 42*41

Table 5 GGA Data Format

Name Example Units Description

Message ID $GPGSV GSV protocol header

2 Range 1 to 3 Number of

Messages

1

Messages Number

1

Satellites in View

Satellite ID

Elevation

Azimuth

SNR (C/No)

1

07

07

79

048

42

Range 1 to 3

Channel 1(Range 1 to 32) degrees Channel 1(Maximum 90) degrees Channel 1(True, Range 0 to 359) dBHz Range 0 to 99, null when not tracking

Satellite ID

Elevation

Azimuth

SNR (C/No)

27

27

138

42

Channel 4(Range 1 to 32) degrees Channel 4(Maximum 90) degrees Channel 4(True, Range 0 to 359) dBHz Range 0 to 99, null when not tracking

Checksum *71

＜ 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 6 contains the values of the following example:

$GPRMC, 161229.487, A, 3723.2475, N, 12158.3416, W, 0.13, 309.62, 120598, ,*10

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RGM-3550LP User Manual

Table 6 GGA Data Format

Message ID

UTC Position

$GPRMC

Description

RMC protocol header

161229.487 hhmmss.sss

Status A A=data valid or V=data not valid

Latitude 3723.2475

ddmm.mmmm

N/S Indicator N N=north or S=south

E/W Indicator

Speed Over Ground

Course Over

Ground

W E=east or W=west

0.13 knots

309.62 degrees True

Magnetic Variation degrees E=east or W=west

Checksum *10

＜ CR ＞＜ LF ＞ End of message termination

VTG-Course Over Ground and Ground Speed

Table 7 contains the values of the following example:

$GPVTG, 309.62, T, , M, 0.13, N, 0.2, K*6E

Table 7 VTG Data Format

Name Example

Message ID $GPVTG

Units Description

VTG protocol header

Reference T True

Reference M Magnetic

Speed 0.13 knots Measured horizontal speed

Speed

Units

0.2

K km/hr Measured horizontal speed

Kilometer per hour

Checksum *6E

＜ CR ＞＜ LF ＞ End of message termination

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RGM-3550LP User Manual

GPS Receiver User’s Tip

1. GPS signal will be affected by weather and environment conditions, thus suggest to use the

GPS receiver under less shielding environments to ensure GPS receiver has better receiving performance.

2. When GPS receiver is moving, it will prolong the time to fix the position, so suggest to wait for the satellite signals to be locked at a fixed point when first power-on the GPS receiver to ensure to lock the GPS signal at the shortest time.

3. The following situation will affect the GPS receiving performance: a. Solar control filmed windows. b. Metal shielded, such as umbrella, or in vehicle. c. Among high buildings. d. Under bridges or tunnels. e. Under high voltage cables or near by radio wave sources, such as mobile phone base stations. f. Bad or heavy cloudy weather.

4. If the satellite signals can not be locked or encounter receiving problem (while in the urban area), the following steps are suggested: a. Please plug the external active antenna into GPS receiver and put the antenna on outdoor or the roof of the vehicle for better receiving performance. b. Move to another open space or reposition GPS receiver toward the direction with less blockage. c. Move the GPS receiver away from the interferences resources. d. Wait until the weather condition is improved.

5. While a GPS with a backup battery, the GPS receiver can fix a position immediately at next power-on if the build-in backup battery is full-recharged.

Copyright © 2007-2008, RoyalTek Company Ltd.

RGM-3550LP User Manual

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Copyright © 2007-2008, RoyalTek Company Ltd.