Holux GR-91 SPECIFICATION

GPS Engine Board

GR-91
SPECIFICATION

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

(300) 新竹市科學園區創新一路 1-1 號

TEL: [phone] FAX: [phone]

Website: www.holux.com

Ver : 0.4

All Right Reserved

GR-91

GPS Module series

Version Change History

THE PRO NAME IN GPS

Version

0.1 2008/09/18 Draft release

0.2 2008/11/25 Preliminary release

0.3 2009/01/19 Modify 2.2 PIN Definition PIN 11 ON_OFF

0.4 2009/03/09 Modify Fig .A-1 & A-2 reference circuit

0.5 2010/12/10 Add reflow profile

Date Revised Reason

Modify 2.3 power for V02 ver

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

2

GR-91

GPS Module series

THE PRO NAME IN GPS

Index

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

1.1 General introductions.................................................................. 4

1.2 Key Features ................................................................................ 4

1.3 Applications ................................................................................. 4

2 Technical Description.............................................................................5

2.1 Block Diagram.............................................................................. 5

2.2 Pin Definition................................................................................ 5

2.3 Specification................................................................................. 7

3 Mechanical Dimension ...........................................................................9

3.1 Mechanical Dimension ................................................................9

4 Package .................................................................................................10

4.1 Packing .......................................................................................10

4.2 Reference Product Photo .......................................................... 11

5. User Interface........................................................................................12

5.1 NMEA Protocol...........................................................................12

6. Reference design..................................................................................21

6.1 Reference circuit........................................................................21

6.2 Reference PCB pattern ..............................................................22

6.3 Recommendation reflow profile................................................23

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

3

GR-91

GPS Module series

THE PRO NAME IN GPS

1. Introduction

1.1 General introductions

GR-91 is an ultra miniature 13 * 15 * 2.2 mm GPS engine board designed

by low power consumption SiRF GPS solution. It provides superior
sensitivity up to -159dBm and fast Time-To-First-Fix in navigation
application. The stable performance of GR-91 is your best choice to be
embedded in your portable device design, like PDA、PND、mobile phone、
Digital Camera for GPS service.

1.2 Key Features

‧ small form factor: 13* 15 * 2.2 mm
‧ RoHS/WEEE compliant
‧ High sensitivity -159 dBm
‧ Tracking up to 20 Channel of satellites
‧ Fast Position Fix
‧ Low power consumption
‧ RTCM-in ready.
‧ Built-in WAAS/EGNOS/MSAS Demodulator.
‧ Support NMEA0183 V 3.0 ASCII data protocol.
‧ Real time navigation for location based services.
‧ For Car Navigation, Marine Navigation, Fleet Management, AVL and

Location-Based Services, Auto Pilot, Personal Navigation or touring
devices, Tracking devices/systems and Mapping devices application

1.3 Applications

‧ Automotive and Marine Navigation
‧ Automotive Navigator Tracking
‧ Emergency Locator
‧ Geographic Surveying
‧ Personal Positioning
‧ Sporting and Recreation
‧ Embedded applications: Smart phone, UMPC, PND, MP4

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

4

GR-91

12 11

GPS Module series

2 Technical Description

2.1 Block Diagram

THE PRO NAME IN GPS

2.2 Pin Definition

P1

P2

P3

P4

P5

P6

P7

P8

P9

P10

P11

Top view Button view

Pin Pin Name Type

P22

P21

P20

P19

P18

P17

P16

P15

P14

P13

P12

P22

P21

P20

P19

P18

P17

P16

P15

P14

P13

P12

22

GR91_GPS_V02_081219

17 6

Function description

P1

P2

P3

P4

P5

P6

P7

P8

P9

P10

P11

1

2

3

RXDB

TXDB

1PPS

I Serial Data Input B

O Serial Data Output B

O 1 PPS output pulse width 100 ms, rising edge tolerance is +/-

50ns.

4

TXDA

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

O Serial Data Output A

5

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

GR-91

Figure 1 gives a broad guideline for pulse waveforms that is

Boot selection. Pull high this pin at power on stage for flash

GPS Module series

5

RXDA

I Serial Data Input A

THE PRO NAME IN GPS

6

7

8

9

10

11

GND

GPIO0

GPIO1

GPIO4

VOUT

ON_OFF

G Ground

I/O General purpose I/O

I/O General purpose I/O. flash at 1Hz when position is fixed.

I/O General purpose I/O

O Power State Indicate, 2.85 VDC Output

I ON_OFF input is a 1.5V-level direct hardware connection to the

internal Finite State Machine.

The RTC clock must be on and stable for this control to be

functional.

Minimum on pulse duration is two RTC ticks, about 63 µs

Minimum inter-pulse interval is one second.

Minimum off duration is two RTC ticks, about 63 µs.

achievable in most applications.

12

13

14

15

16

17

18

19

VCC_RF_O

20

21

22

V_BAT

VCC_IN

GPIO13

GPIO14

GPIO15

GND

BOOT

GND

RF_IN

GND

I RTC and backup SRAM power Input, 1.36 ~ 6.0 VDC

I 2.95 ~ 6.0 VDC Power Input

I/O General purpose I/O

I/O General purpose I/O

I/O General purpose I/O

G Ground

I

programming.

O Active antenna power supply output, 2.85 VDC

G Ground

I GPS signal input, 2.85 VDC output

G Ground

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

6

GR-91

GPS Module series

2.3 Specification

THE PRO NAME IN GPS

General

GPS technology SiRF GPS chipset

Frequency L1,1575.42 MHz

C/A Code 1.023 MHz chip rate

Channels 20 channels all in view Tracking

Sensitivity Better than -159 dBm

Receiver Accuracy

Position

Velocity Without aid:0.1 M/sec

Time 0.1µs. Sync GPS time

Datum

Datum WGS84(Default)

Time to First Fix

Hot start 1 sec. average

Warm start 38 sec. average

(Follow SiRF chip specification)
Without aid:10 M 2D-RMS
DGPS(WAAS, EGNOS, MSAS, RTCM):1~5 M

(Follow SiRF chip specification)

Cold start 42 sec. average

Reacquisition

Protocol

＜0.1sec.

NMEA0183(V3.0 ASCII )­GGA,GLL,GSA,GSV,RMC,VTG

GPS Output Data

Support Baud rate 4800/9600/…./115200 bps (default

4800), Data bit:8 , Stop bit:1, No parity.

Update Rata

1 Hz(default)

Protocol Support NMEA-0183

1PPS
Limitations

Acceleration Limit

Altitude Limit

Velocity Limit

Enable(1 Hz pulse 10% duty cycle)
(Follow SiRF chip specification)

＜4G
＜18000 meters
＜515 M/sec

Jerk Limit 20 M/sec3

Power

Operation Current Acquisition:25 mA@3.3V
Operation Current Tracking:24 mA@3.3V

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

7

GR-91

GPS Module series

Trickle Power Mode

THE PRO NAME IN GPS

Operation Average

Current

DC Input Range

Processing Core

Processor Type ARM7TDMI

Processor Speeds

Interface
Temperature

Operating Temperatur

Storage Temperature

Operating Humidity

Physical

Dimension

Tracking:6.5 mA@3.3V , 500ms on Duty Cycle 3 sec

VCC_IN:2.95~6.0V
V_BAT:1.36~6.0V

50 MHz

CMOS 2.85 V Level

-40 to +85

e

-40 to +85

5% to 95%, Non condensing

13 * 15 * 2.2 mm.

Weight <2g.

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

8

GR-91

GPS Module series

3 Mechanical Dimension

3.1 Mechanical Dimension

TOP VIEW

THE PRO NAME IN GPS

BOTTOM VIEW

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

9

GR-91

GPS Module series

4 Package

4.1 Packing

THE PRO NAME IN GPS

Tray dimension: 325*220*9 mm, Standard Content Qty: 100 pcs.
Carton dimension: 340*235*120 mm, Standard Content Qty: 2,000 pcs.

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

10

GR-91

GPS Module series

4.2 Reference Product Photo

The photo is for reference, the real content will depend on the real
configuration.

Top side:

THE PRO NAME IN GPS

Bottom side: (The PCB version depend)

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

11

GR-91

GPS Module series

THE PRO NAME IN GPS

5. User Interface

GR-91 provides 2-wire digital UART port for communication of GPS position
data using NMEA protocol or extension protocol. UART port is capable of 4800
to 115200 baud rate.

5.1 NMEA Protocol

GR-91 is default to support standard NMEA-0183 protocol. In addition, a
series of SiRF extensions have been developed that can be used to provide
extended capabilities common to many applications.

NMEA Protocol format

GR-91 is capable of supporting following NMEA formats:

NMEA RECORD Description

GGA GPS fix data

GLL Geographic

GSA GNSS DOP and active satellite

GSV GNSS Satellites in view

RMC Recommended minimum specific GNSS data

VTG Course Over Ground and Ground Speed

ZDA Time & Data

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

12

GR-91

GPS Module series

THE PRO NAME IN GPS

5.1.2 Global Positioning System Fix Data (GGA)

Table 4-2 contains the values for the following example:

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

Table 4-2 GGA Data Format

Name

Message ID $GPGGA

UTC Time 161229.487

Latitude 3723.2475

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

Longitude 12158.3416

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

Position Fix Indicator

Satellites Used 07 Range 0 to 12

HDOP 1.0 Horizontal Dilution of Precision

MSL Altitude

Units M Meters

Geoid Separation

Units M Meters

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

Diff. Ref. Station ID 0000

(1)

9.0 Meters

(1)

Example Units

GGA protocol header

hhmmss.sss

ddmm.mmmm

dddmm.mmmm

1 See Table 5-3

Meters

Description

Checksum *18

<CR> <LF> End of message termination

(1). SiRF Technology Inc. does not support geoid corrections. Values are WGS84 ellipsoid

heights.

Table 4-3 Position Fix Indicator

Value Description

0 0 Fix not available or invalid

1 GPS SPS Mode, fix valid

2 Differential GPS, SPS Mode, fix valid

3 GPS PPS Mode, fix valid

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

13

GR-91

GPS Module series

THE PRO NAME IN GPS

5.1.3 Geographic Position with Latitude/Longitude(GLL)

Table 4-4 contains the values for the following example:

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

Table 4-4 GLL Data Format

Name

Message ID $GPGLL GLL protocol header

Latitude 3723.2475 ddmm.mmmm

N/S Indicator N 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.sss

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

Checksum *2C

<CR> <LF> End of message termination

Example

Units Description

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

14

GR-91

GPS Module series

5.1.4 GNSS DOP and Active Satellites (GSA)

Table 4-5 contains the values for the following example:

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

Table 4-5 GSA Data Format

THE PRO NAME IN GPS

Name

Message ID $GPGSA

Example Units

GSA protocol header

Description

Mode 1 A See Table 5-6

Mode 2 3 See Table 5-7

Satellite Used

Satellite Used

(1)

07 Sv on Channel 1

(1)

02 Sv on Channel 2

…… ….

Satellite Used

(1)

Sv on Channel 12

PDOP 1.8 Position Dilution of Precision

HDOP 1.0 Horizontal Dilution of Precision

VDOP 1.5 Vertical Dilution of Precision

Checksum *33

<CR> <LF> End of message termination

1. Satellite used in solution.

Table 4-6 Mode 1

Value Description

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

A 2DAutomatic—allowed to automatically switch 2D/3D

Table 4-7 Mode 2

Value Description

1 Fix Not Available

2 2D

3 3D

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

15

GR-91

GPS Module series

THE PRO NAME IN GPS

5.1.5 GNSS Satellites in View (GSV)

Table 4-8 contains the values for 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 4-8 GSV Data Format

Name

Message ID $GPGSV

Number of Messages(1)

Message Number

(1)

1 Range 1 to 3

Example Units

GSV protocol header

2 Range 1 to 3

Description

Satellites in View 07

Satellite ID 07 Channel 1 (Range 1 to 32)

Elevation 79 degrees Channel 1 (Maximum 90)

Azimuth 048 degrees Channel 1 (True, Range 0 to 359)

SNR (C/No) 42 dBHz Range 0 to 99, null when not tracking

.... ....

Satellite ID 27 Channel 4 (Range 1 to 32)

Elevation 27 degrees Channel 4 (Maximum 90)

Azimuth 138 degrees Channel 4 (True, Range 0 to 359)

SNR (C/No) 42 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.

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

16

GR-91

GPS Module series

THE PRO NAME IN GPS

5.1.6 Recommended Minimum Specific GNSS Data (RMC)

Table 4-9 contains the values for the following example:

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

Table 4-9 RMC Data Format

Name

Example Units Description

Message ID $GPRMC RMC protocol header

UTC Time 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

Longitude 12158.3416

dddmm.mmmm

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

Speed Over Ground 0.13 knots

Course Over Ground

309.62 degrees True

Date 120598 ddmmyy

Magnetic Variation

(1)

degrees E=east or W=west

Checksum *10

<CR> <LF> End of message termination

(1). SiRF Technology Inc. does not support magnetic declination. All “course over ground” data

are geodetic WGS84 directions.

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

17

GR-91

GPS Module series

5.1.7 Course Over Ground and Ground Speed (VTG)

Table 4-10 contains the values for the following example:

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

Table 4-10 VTG Data Format

THE PRO NAME IN GPS

Name

Message ID $GPVTG VTG protocol header

Course 309.62 degrees Measured heading

Reference T True

Course degrees Measured heading

Reference M Magnetic

Speed 0.13 knots Measured horizontal speed

Units N Knots

Speed 0.2 km/hr Measured horizontal speed

Units K Kilometers per hour

Checksum *6E

<CR> <LF> End of message termination

(1). SiRF Technology Inc. does not support magnetic declination. All “course over ground” data

are geodetic WGS84 directions.

Example Units

Description

(1)

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

18

GR-91

GPS Module series

5.1.8 MSK Receiver Signal (MSS)

Table 4-11 contains the values for the following example:
$GPMSS,55,27,318.0,100,*66

Table 4-11 MSS Data Format

THE PRO NAME IN GPS

Name

Message ID $GPMSS
Signal Strength 55
Signal-to-Noise

Example Units

MSS protocol header

dB dB SS of tracked frequency

27

dB SNR of tracked frequency

Description

Ratio
Beacon Frequency

318.0

Beacon Bit Rate 100

Checksum 66

<CR> <LF> End of message termination

kHz Currently tracked frequency

100 bits per second

Note – The MSS NMEA message can only be polled or scheduled using the
MSK NMEA input message.

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

19

GR-91

GPS Module series

THE PRO NAME IN GPS

5.1.9 ZDA—SiRF Timing Message

Outputs the time associated with the current 1 PPS pulse. Each message will
be output within a few hundred ms after the 1 PPS pulse is output and will tell
the time of the pulse that just occurred.

Table 4-12 contains the values for the following example:

$GPZDA,181813,14,10,2003,00,00*4F

Table 4-12 ZDA Data Format

Name

Message ID $GPZDA ZDA protocol header

UTC Time

Day 14 01 TO 31

Month 10 01 TO 12

Year 2003 1980 to 2079

Local zone hour 00 knots Offset from UTC (set to 00)

Local zone hour 00 Offset from UTC (set to 00)

Checksum 4F

<CR> <LF> End of message termination

Example Units

181813 Either using valid IONO/UTC or

estimated from default leap seconds

Description

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

20

GR-91

GPS Module series

6.

Reference design

6.1 Reference circuit

Fig A-1 is GR-91 uses passive Antenna connects to RS-232 transceiver
solutions intended for portable or hand-held applications such as notebook
and palmtop computers.

THE PRO NAME IN GPS

Fig. A-1

Fig A-2 is GR-91 uses Active Antenna connects to RS-232 transceiver
solutions intended for portable or hand-held applications such as notebook
and palmtop computers.

Fig. A-2

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

21

GR-91

GPS Module series

Fig A-3 is use GR-91 engine board solution recommend main component list.

THE PRO NAME IN GPS

Main component list

Component Part Number Manufacture

D1 ASD751 Formosa
D2,D3 LTST-C190KRKT LITEON
BT1 MS621FL11E SEIKO
U1 SP3223E Sipex
U2 XC6209B332MRN TOREX

6.2 Reference PCB pattern

Fig. A-3

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

22

GR-91

GPS Module series

6.3 Recommendation reflow profile

1. We strongly recommend that this module should be designed to mount on
top side of motherboard with main chip together which process the final
reflow.

2. The maximum frequency of this module to pass reflow process should be
no more than twice, including repair operation, otherwise it may cause side
effect to the performance.

3. Below is the recommend reflow profile referred to Main SiRF chipSet.

THE PRO NAME IN GPS

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

23

GR-91

GPS Module series

THE PRO NAME IN GPS

HOLUX Technology, Inc.

No.1-1, Innovation Rd.1, Hsinchu Science Park, Hsinchu, Taiwan(R.O.C)

TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

24