RoyalTek MEB-1000 User Manual

MEB-1000 User Manual

MEB-1000 User Manual

Version 1.0
2007/05/25

This document contains information highly confidential to RoyalTek Company LTD
(RoyalTek). It is provided for the sole purpose of the business discussions between
customer 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.

8F,256 Yang Guang Street, Neihu Chiu, Taipei, Taiwan

TEL: [phone]

FAX: [phone]

http://www.royaltek.com/contact

文件編號：

MEB-1000 User Manual

Index

1 Introduction.......................................................................................................... 1

1.1 Product Features...................................................................................1

1.2 Product Applications..............................................................................1

1.3 Product Pictures....................................................................................2

1.4 The interface Board Pin Definition.........................................................2

1.5 RoyalTek Evaluation Kit MEV-1000 for MEB-1000................................4

1.6 MEB-1000 System Block Diagram ........................................................5

1.7 MEB-1000 Technical Specification ........................................................5

1.8 Application Circuit .................................................................................7

1.9 Recommended Layout PAD ..................................................................9

1.10 Mechanical Layout ..............................................................................10

1.11 Hardware Interface..............................................................................10

2 Software Interface ............................................................................................. 15

2.1 NMEA V3.1 Protocol ...........................................................................15

3 RoHS Reflow Diagram ...................................................................................... 19

4 Package Specification and Order Information ................................................... 20

5 Contact Information ........................................................................................... 21

6 Revision History ................................................................................................ 21

MEB-1000 User Manual

Table Index

Table 1-1 J2 Connector .......................................................................................2

Table 1-2 Switch U4 ............................................................................................3

Table 1-3 Connector: ...........................................................................................4

Table 1-4 Pin Definition......................................................................................11

Table 2-1 NMEA-0183 Output Messages ..........................................................15

Table 2-2 GGA Data Format ..............................................................................15

Table 2-3 Position Fix Indicators........................................................................16

Table 2-4 GSA Data Format ..............................................................................16

Table 2-5 Mode 1...............................................................................................16

Table 2-6 Mode 2...............................................................................................17

Table 2-7 GGA Data Format ..............................................................................17

Table 2-8 GGA Data Format ..............................................................................18

MEB-1000 User Manual

Figure Index

Figure 1 MEB-1000 Picture .................................................................................2

Figure 2 MEB-1000 Interface Board....................................................................2

Figure 3 Block Diagram .......................................................................................5

Figure 4 Application Circuit..................................................................................7

Figure 5 Recommended Layout Pad...................................................................9

Figure 6 Mechanical Layout ..............................................................................10

Figure 7 Interface Pin Number ..........................................................................11

Figure 8 RoHS Reflow Diagram ........................................................................19

Figure 9 Tape & Reel Packaging Information ....................................................20

MEB-1000 User Manual

1 Introduction

RoyalTek MEB-1000 small form factor board is the newest generation of RoyalTek GPS

module. The module is powered by MediaTek MT3301 and MT3179. RoyalTek proprietary

navigation technology that provides you with stable and accurate navigation data. The

smallest form factor and miniature design is the best choice to be embedded in a device such

as portable navigation device, personal locator, speed camera detector and vehicle locator.

1.1 Product Features

 32 parallel channels

 SMT type with stamp holes

 High quality stereo audio output

 TCXO design

 0.1 second reacquisition time

 NMEA-0183 compliant protocol/ customize protocol

 Enhanced algorithm for navigation stability

 Excellent sensitivity for urban canyon and foliage environments.

 DGPS (WAAS, EGNOS ) support



Auto recovery while RTC crashes

1.2 Product Applications

 Automotive navigation

 Personal positioning and navigation

 Marine navigation

 Timing application

1

1.3 Product Pictures

+

(1) MEB-1000

pin1

(2) MEB-1000 Interface board

MEB-1000 User Manual

Figure 1 MEB-1000 Picture

SMARF connector (J1)

J2 CONNECTOR

U4

Pin 1

Pin 2

Pin 3

Pin 4

Pin 19

Pin 20

Pin 5

Figure 2 MEB-1000 Interface Board

1.4 The interface Board Pin Definition

Table 1-1 J2 Connector

Pin # Signal Name I/O Description Characteristics

1

2

3

ANTPWR I DC Supply Voltage Output

NC

VBAT I RTC Backup Battery

Supply

2

3.3V±5%

3.6V~1.6 DC +

MEB-1000 User Manual

4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

VCC I DC Supply Voltage Output
Reset I External Reset Signal
NC
NC
NC
NC
NC
TX0 O Serial Port 0
RX0 I Serial Port 0
NC
TX1 O Serial Port 1
RX1 I Serial Port 1
NC
NC
GND G Reference Ground
Time Mark O One pulse per second

3.3V±5%

20

GND G Reference Ground

Table 1-2 Switch U4

Pin # Signal Name 0/1 Description Characteristics
1

2

3
4
5

6

GPIO-0 GPIO input/output Switch:

0:Low 1:High CMOS
TTL Level

GPIO-4 GPIO input/output Switch:

0:Low 1:High CMOS

TTL Level
N.C
N.C
GPS_3V3 Power supply for GPS section Switch:

N.C

0:Low 1: DC 3.3V

output

7
8

N.C
RF_Bias RF_Bias voltage switch 0: open. No voltage

3

provide antenna.

1:Provide 2.85V to

MEB-1000 User Manual

Table 1-3 Connector:

Pin # Description Characteristics

antenna.

J1

GPS RF Connector 1575.42MHz

1.5 RoyalTek Evaluation Kit MEV-1000 for MEB-1000

(Please refer to RoyalTek Evaluation Kit MEV-1000 for MEB-1000 Operational Manual for

more information)

4

MEB-1000 User Manual

1.6 MEB-1000 System Block Diagram

System block diagram description:

(1) External antenna.
(2) 4 Mega bits flash memory
(3) 31 pin I/O pin

Antenna

Figure 3 Block Diagram

1.7 MEB-1000 Technical Specification

Impedance：50Ω

No Function Specification

GPS receiver

Chipset

1

Frequency L1 1575.42MHz.

2

Code C.A. Code.

3

Channels 32

4

Sensitivity (Acquisition)

5

Cold start 36 sec (open sky)

6

Warm start 35 sec (open sky)

7

Hot start 1 sec (open sky)

8

MediaTek MT3179 (RF )& MT3301 (Digital)

-130dBm.

5

MEB-1000 User Manual

Reacquisition < 1sec

9

Position accuracy 3 meters 2D RMS(w/o aid)

10

Maximum altitude 18000 m

11

Maximum velocity 515 m/s

12

Trickle power mode N/A

13

Update rate 1Hz

14

Testability N/A

15

Protocol setup

16

DGPS 1.WAAS, EGNOS

17

Interface

LNA No LNA

18

I/O Pin 31pin

19

Mechanical requirements

Weight

20

Power consumption

Vcc DC 3.3 ±5%

21

Current

22

Environment

Operating temperature

23

Storage temperature

24

It can store the protocol setup in the SRAM and Flash memory.

2.RTCM protocol

≦3.5g

GPS :

< 65mA@3.3V (ACQ w/o ext. Antenna)

< 40mA@3.3V (Tracking w/o ext. Antenna)

-30 ~ 85℃

-40 ~ 85℃

6

1.8 Application Circuit

MEB-1000 User Manual

Note:

(1) Serial Interface:

(Ⅰ)The TXA & RXA pin is recommended to connect to serial resistance(220

(Ⅱ)The TXB & RXB pin is recommended to connect to serial resistance(220

(2) Backup Battery:

It’s recommended to connect a backup battery to V_RTC_3V3.
In order to enable the warm start and hot start features of the GPS receiver.
If you don’t intend to use a backup battery, connect this pin to GND or open.
If you use backup battery, should be add a bypassing capacitor (10uF) at
V_RTC_3V3 pin. It can reduce noise and increase the stability.

(3) GPS_RF_IN:

Figure 4 Application Circuit

Ω) and pull up (10KΩ). It can increase the stability of serial data.

Ω) and pull up (10KΩ), if use the DGPS output.

If no use DGPS output, it don’t connect anything.

Connecting to the antenna has to be routed on the PCB. The transmission
line must to controlled impedance to connect RF_IN to the antenna or
antenna connector of your choice. (Impedance 50Ω)

(4) Power:

Connect V_GPS_3V3 pin to DC 3.3V. The power supply must add bypassing

7

MEB-1000 User Manual

capacitor(10uF and 1uF).It can reduce the Noise from power supply and
increase power stability.

(5) Active antenna bias voltage:

The Vcc_RF_OUT pin(pin 20) is provide voltage 2.85V. If you use active
antenna, you can connect this pin to V_ANT_IN pin (pin 19) to provide bias
voltage of active antenna. The bias voltage will be through GPS_RF_IN pin
to provide active antenna bias voltage from Vcc_RF_OUT pin.
If your bias voltage of active antenna isn’t 2.85V, you can input bias voltage
to V_ANT_IN pin (pin 19).And input bias voltage of you need. The input bias
voltage will through GPS_RF_IN pin to provide active antenna bias voltage
from V_ANT_IN pin.
PS:
(1) The maximum power consumption of active antenna is about 100mW.
(2) Suggest input gain > 20dB，and NF < 1.5 dB 。

(6) GPIO:

The GPIO pin is recommended to connect to serial resistance(220Ω),if use
the GPIO function.
If no use GPIO function, it don’t connect anything.

8

1.9 Recommended Layout PAD

MEB-1000 User Manual

TOP View

Figure 5 Recommended Layout Pad

9

1.10 Mechanical Layout

MEB-1000 User Manual

P17

P31

Figure 6 Mechanical Layout

1.11 Hardware Interface

Interface Pin Number:

P16

P1

Unit：mm

10

MEB-1000 User Manual

=

Figure 7 Interface Pin Number

Table 1-4 Pin Definition

Pin # Signal Name I/O Description Characteristics

1 V_GPS_3V3 I DC Supply

Voltage input

2 GND G Ground Reference Ground

3 N.C

4 RXA I Serial port A

5 TXA O Serial port A

6 TXB O Serial port B

7 RXB I Serial port B

8 N.C

9 RF_ON O Indicates power

state of RF part

DC +3.3V±5%

VVVVV

8.00.3V- 26.3 ≤≤≥≥

ILIH

VVVVV

OLOH

OLOH

VVVV

0 85.2 =

OLOH

4.00.3V- 4.215.3 ≤≤≥≥

VVVVV

4.00.3V- 4.215.3 ≤≤≥≥

VVVVV

8.00.3V- 26.3 ≤≤≥≥

ILIH

10 GND G Ground Reference Ground

11 N.C

12 N.C

13 GND G Ground Reference Ground

11

MEB-1000 User Manual

±

=

+

+

14 N.C

15 GND G Ground Reference Ground

16 GND G Ground Reference Ground

17 GPS_RF_IN I GPS Signal input 50 Ω @1.57542GHz

18 GND G Ground Reference Ground

19 V_ANT_IN I Active Antenna

20 VCC_RF_OUT O Supply Antenna

21 V_RTC_3V3 I Backup voltage

22 Reset I Reset (Active

23 N.C

24 N.C

25 GPIO4 I/O General purpose

26 GPIO0 I/O General purpose

27 N.C

Bias voltage

Bias voltage

supply

low)

I/O

I/O

Receiving DC power supply for active

antenna bias.

%585.2

O

Current<35mA

VV

10uACurrent

≤

3.6V~1.6 DC

VVVVV

8.00.3V- 26.3 ≤≤≥≥

ILIH

VVVVV

8.00.3V- 26.3 ≤≤≥≥

ILIH

VVVVV

OLOH

OLOH

4.00.3V- 4.215.3 ≤≤≥≥

VVVVV

8.00.3V- 26.3 ≤≤≥≥

ILIH

VVVVV

4.00.3V- 4.215.3 ≤≤≥≥

28 N.C

29 PPS O One pulse per

second

30 GND G Ground Reference Ground

31 N.C

V_GPS_3V3(+3.3V DC power Input)

This is the DC power supply input pin for GPS system. It provides voltage
to module.

GND

GND provides the ground .

RXA

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

VVVVV

OLOH

4.00.3V- 4.215.3 ≤≤≥≥

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MEB-1000 User Manual

software.

RXB

This is the auxiliary receiving channel and is used to input differential
corrections to the board to enable DGPS navigation.(Option)

TXA

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

TXB

For user’s application (not currently used).

RF_ON

This pin indicates state of RF voltage.

GPS_RF_IN

This pin receives GPS analog signal. The line on the PCB between the
antenna(or antenna connector) has to be a controlled impedance line
(Microstrip at 50Ω).

V_ANT_IN

This pin is reserved as external DC power supply input for active antenna.
If using 2.85V active antenna, pin 20 has to be connected to pin 19.
If using 3.3V or 5V active antenna ,this pin has to be connected to 3.3V or
5V power supply.
PS: The current must be ≦100mA and voltage ≦12V,if using external
power supply.

VCC_RF_OUT

This pin can provide power 35mA@2.85V for active antenna.

Reset

This pin provides an active-low reset input to the board. It causes the board
to reset and start searching for satellites. If not utilized, it may be left open.

PPS

This pin provides one pulse-per-second output from the board, which is
synchronized to GPS time. This is not available in Trickle Power mode.

V_RTC_3V3 (Backup battery )

This is the battery backup input that powers the SRAM and RTC when
main power is removed. Typical current draw is 10uA.
The supply voltage should be between 1.6V and 3.6V.

GPIO Functions

13

MEB-1000 User Manual

Several I/Os are connected to the digital interface connector for custom
applications.

14

MEB-1000 User Manual

2 Software Interface

2.1 NMEA V3.1 Protocol

Its output signal level is TTL: 4800 bps (default), 8 bit data, 1 stop bit and no parity. It supports

the following NMEA-0183

Messages: GGA, GSA, GSV, RMC .

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

Below:

Table 2-1 NMEA-0183 Output Messages

NMEA Record Description

GGA Global positioning system fixed data

GSA GNSS DOP and active satellites

GSV GNSS satellites in view

RMC Recommended minimum specific GNSS data

GGA-Global Positioning System Fixed Data

Below table 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

Table 2-2 GGA Data Format

Name Example Units Description

Message ID $GPGGA GGA protocol header

UTC Position 161229.48

7

Latitude 3723.2475 ddmm.mmmm

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

Longitude 12158.341

6

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

Position Fix Indicator 1 See Table 2-1

hhmmss.sss

Dddmm.mmmm

Satellites Used 07 Range 0 to 12

HDOP 1.0 Horizontal Dilution of

Precision

MSL Altitude 9.0 meters

Units M meters

Geoid Separation meters

15

MEB-1000 User Manual

Units M meters

Age of Diff. Corr. second

Diff. Ref. Station ID 0000

Checksum *18

Null fields when DGPS is not
used

＜CR＞＜LF＞

End of message termination

Table 2-3 Position Fix Indicators

Value Description

0 Fix not available or invalid

1 GPS SPS Mode, fix valid

2 Differential GPS, SPS Mode, fix valid

3-5 Not Supported GPS PPS Mode, fix valid

6 Dead Reckoning Mode, fix valid

GSA-GNSS DOP and Active Satellites

Below table 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 2-4 GSA Data Format

Name Example Units Description

Message ID $GPGSA GSA protocol header

Mode 1 A See Table 4-2

Mode 2 3 See Table 4-1

Satellite Used 07 Sv on Channel 1

Satellite Used 02 Sv on Channel 2

…. ….

Satellite Used 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

Table 2-5 Mode 1

Value Description

1 Fix not available

2 2D

16

MEB-1000 User Manual

3 3D

Table 2-6 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

Below table 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 2-7 GGA Data Format

Name Example Units Description

Message ID $GPGSV GSV protocol header

Number of

Messages

Messages

Number

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

1

1

2 Range 1 to 3

1 Range 1 to 3

＜CR＞＜LF＞

1

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

required.

RMC-Recommended Minimum Specific GNSS Data

Below table contains the values of the following example:

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

End of message termination

17

MEB-1000 User Manual

Table 2-8 GGA Data Format

Name Example Units Description

Message ID $GPRMC RMC protocol header

UTC Position 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

Date 120598 ddmmyy

Magnetic Variation degrees E=east or W=west

Mode A A=Autonomous, D=DGPS, E=DR

Checksum *10

309.62 degrees True

18

p

3 RoHS Reflow Diagram

MEB-1000 User Manual

260oC,10sec max

Critical Zone

T

to T

L

P

Tem

erature

o

o

o

o

T

P

T

L

Ts

max

20~40sec

Ramp-up

o

C/sec max

3

60~150sec

Ramp-down

o

C/sec

6

o

Ts

min

Ts Pretest

60~180sec

T25oC to peak,480 sec max

Time

Figure 8 RoHS Reflow Diagram

19

MEB-1000 User Manual

4 Package Specification and Order Information

Shipment Method: Tape and reel

SMT type with stamp holes (31 holes)

Figure 9 Tape & Reel Packaging Information

20

MEB-1000 User Manual

5 Contact Information

Contact: [e-mail]

Headquarter:

Address: 8F, 256 Yang Guang Street, Neihu Chiu, Taipei, Taiwan

Tel: [phone]

Fax: [phone]

Web Site: http://www.royaltek.com

Web Site Customer Service: http://www.royaltek.com/contact

6 Revision History

Title MEB-1000 GPS Receiver Module

Doc Type User Manual

Revision

Number

1.0 2007/05/25 Amy Liu Initial Release

Date Author Change notice

21