Holux M-91 SPECIFICATION

GPS Engine Board

M-91
SPECIFICATION

No.1-1, Innovation Rd.1, HsinChu City 300, Science-based Industrial Park, Taiwan

(300) 新竹市科學園區創新一路 1-1 號

TEL: [phone] FAX: [phone]

Website: www.holux.com

All Right Reserved

M-91

GPS Module series

Version Change History

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Version

0.1 2007/06/21 Draft release

1.0 2007/07/01 Release

1.1 2007/07/09 Modify the product photo.

1.2 2007/08/15 1. Adding detail pin assignment drawing in 2.2.

1.3 2007/09/03 1. Modifying 2.1diagram to remove LNA and SAW(type B)

1.4 2008/06/05 1. Release V03 PCB ver, changed the shielding cover structure.

1.5 2009/03/09 1. Modify Fig .A-1 & A-2 reference circuit

Date Revised Reason

2. Modifying 4.1 packing drawing.

3. Modifying 6.2 reference PCB pattern

2. Adding 2.4 configuration

3. Modify the product photo.

2. Modify 2.2 Pin Definition for V03 ver

3. Modify Fig .A-2 reference circuit

4. Modify Fig .A-3 Main component list

2. Modify 2.2 Pin Definition pin18 change “NC” into “RESET”

1.6 2009/07/27 1. Modify V_BAT DC Input power

2. Modify the product photo

1.7 2010/10/25 1. Modify reference design

HOLUX Technology, Inc.
No.1-1, Innovation Rd.1, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

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M-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

2.4 Configuration Information................................................................8

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

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

TOP VIEW ................................................................................................9

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

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

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

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

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

5.2 NMEA Protocol format ....................................................................12

5.3 MTK NMEA Packet Format............................................................. 13

6. Reference design..................................................................................14

6.1 Reference circuit............................................................................. 14

6.2 Reference PCB pattern................................................................... 15

6.3 Recommendation reflow profile.....................................................15

HOLUX Technology, Inc.
No.1-1, Innovation Rd.1, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

3

M-91

GPS Module series

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1 Introduction

1.1 General introductions

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

by low power consumption MTK GPS solution. It provides superior
sensitivity up to -159dBm and fast Time-To-First-Fix in navigation
application. The stable performance of M-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
‧ Searching up to 32 Channel of satellites
‧ Fast Position Fix
‧ Low power consumption
‧ RTCM-in ready.
‧ Built-in WAAS/EGNOS/MSAS Demodulator.
‧ Support NMEA0183 V 3.01 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 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

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M-91

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GPS Module series

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2 Technical Description

2.1 Block Diagram

Option* : This LNA and SAW filter will depend on the antenna type, refer to
section 2.4 “Configuration Information”.

2.2 Pin Definition

P1

P2

P3

P4

P5

P6

P7

P8

P9

P10

P11

P22

P21

P20

P19

P18

P17

P16

P15

P14

P13

P12

Top view Button view

P22

P21

P20

P19

P18

P17

P16

P15

P14

P13

P12

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M-91 GPS Rev: 03

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2008.04.02

P1

P2

P3

P4

P5

P6

P7

P8

P9

P10

P11

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No.1-1, Innovation Rd.1, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

M-91

1 PPS output, synchronized with GPS time.

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

Power down GPS, Low active (Keep NC if not used

GPS Module series

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Pin Pin Name Type

1
2
3

4
5
6
7
8

9
10
11

12

RXDB

TXDB

1PPS

TXDA

RXDA

GND

GPIO8

GPIO0

GPIO4

VOUT

ON_OFF

V_BAT

I Serial Data Input B
O Serial Data Output B
O

O Serial Data Output A

I Serial Data Input A
G Ground

I/O General purpose I/O
I/O

I/O General purpose I/O

O Power State Indicate, 2.85 VDC Output

I

I RTC and backup SRAM power Input:

Function description

TIME_MARK 1 PPS output, 1us/s

fixed.

is High)

Backup Battery : 2.6 ~ 3.6 V (use battery)

DC Input:3.3~5.0V (use VCC_IN)
13
14
15
16
17
18
19

VCC_RF_O

20
21
22

VCC_IN

GPIO6

GPIO7

GPIO5

GND

RESET

GND

RF_IN

GND

I 3.3 ~ 5 VDC Power Input
I/O General purpose I/O
I/O General purpose I/O
I/O General purpose I/O

G Ground

I Reset , Low active

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 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

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M-91

GPS Module series

2.3 Specification

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General

GPS technology MT3318 GPS chipset

Frequency L1,1575.42 MHz

C/A Code 1.023 MHz chip rate

Channels 32 channels all in view searching

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) total 219 datum’s

Time to First Fix

Hot start 1 sec. average

Warm start 33 sec. average

(Follow MTK chip specification)
Without aid:3.0 M 2D-RMS
DGPS(WAAS, EGNOS, MSAS, RTCM):2.5 M

(Follow MTK chip specification)

Cold start 36 sec. average

Reacquisition

Protocol

＜1sec.

NMEA0183(V3.01)- 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 MTK chip specification)

＜4G
＜18000 meters
＜515 M/sec

Jerk Limit 20 M/sec3

Power

Operation Current Acquisition:65 mA@3.3V
Operation Current

HOLUX Technology, Inc.
No.1-1, Innovation Rd.1, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

Tracking:＜45mA@3.3V

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M-91

GPS Module series

DC Input Range

VCC_IN: 3.3~5.0V
V_BAT :3.3~5.0V

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Processing Core

Processor Type ARM7EJ-S

Processor Speeds

Interface

Temperature

Operating Temperatu

48 MHz

CMOS 2.85 V Level

-40 to +85

re

Storage Temperature

Operating Humidity

Physical

Dimension

-40 to +85

5% to 95%, Non condensing

13 * 15 * 2.2 mm.

Weight <2g.

2.4 Configuration Information

M-91 provides 2 configurations for customer’s patch option.

Model No. LNA SAW Filter

Type A Yes 2 filters Passive 96070-00N

Type B No 1 filter Active 96070-10N

Recommendation

Holux P/N

Antenna

HOLUX Technology, Inc.
No.1-1, Innovation Rd.1, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

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M-91

GPS Module series

3. Mechanical Dimension

3.1 Mechanical Dimension

TOP VIEW

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BOTTOM VIEW

HOLUX Technology, Inc.
No.1-1, Innovation Rd.1, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

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M-91

GPS Module series

4. Package

4.1 Packing

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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 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

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M-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:

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Bottom side: (The PCB version depend)

HOLUX Technology, Inc.
No.1-1, Innovation Rd.1, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

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M-91

GPS Module series

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5. User Interface

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

5.1 NMEA Protocol

M-91 is default to support standard NMEA-0183 protocol. In addition, a series
of MTK extensions (PMTK messages) have been developed that can be used
to provide extended capabilities common to many applications.

5.2 NMEA Protocol format

M-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 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

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M-91

used to tell the decoder how

GPS Module series

5.3 MTK NMEA Packet Format

Preamble TalkerID PktType Datafield * CHK1 CHK2 CR LF

Maximum packet length is restricted to 255 bytes

Field Length Type D

Preamble 1 byte Character “$”

TalkerID 4 byte Character string “PMTK”

PktType 3 byte Character string

“000”to “999”, an identifier

to decode the packet
“, ”must be inserted ahead

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DataField Variable

* 1 byte Character

CHK1

2 byte Character string

CHK2

CR, LF 2 byte Binary data

each data filed to help the
decoder process the Data
Field

The star symbol is used to

mark the end of Data Field
checksum of the data
between Preamble “, ”and
“*”
used to identify the end of a
packet

HOLUX Technology, Inc.
No.1-1, Innovation Rd.1, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

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M-91

GPS Module series

6.

Reference design

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6.1 Reference circuit

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

Fig. A-1

Fig A-2 is M-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 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

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M-91

GPS Module series

6.2 Reference PCB pattern

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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 MTK chipSet.

HOLUX Technology, Inc.
No.1-1, Innovation Rd.1, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

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M-91

GPS Module series

THE PRO NAME IN GPS

HOLUX Technology, Inc.
No.1-1, Innovation Rd.1, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park)
TEL: [phone] FAX:[phone] E-mail:[e-mail] http:www.holux.com.tw

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