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

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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

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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

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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

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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

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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

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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

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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

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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

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