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
1Introduction.......................................................................................................... 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
2Software Interface ............................................................................................. 15
2.1 NMEA V3.1 Protocol ...........................................................................15
3RoHS Reflow Diagram ...................................................................................... 19
4Package Specification and Order Information ................................................... 20
5Contact Information ........................................................................................... 21
6Revision 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

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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

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MEB-1000 User Manual
1.3 Product Pictures
(1) MEB-1000
Figure 1 MEB-1000 Picture
(2) MEB-1000 Interface board
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 ANTPWR I DC Supply Voltage Output 3.3V±5%
2 NC
3 VBAT I RTC Backup Battery
Supply
3.6V~1.6DC +
+
pin1
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
U4
J2 CONNECTOR
Pin 19
Pin 20
Pin 2
Pin 1
SMARF connector (J1)

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MEB-1000 User Manual
4 VCC I DC Supply Voltage Output 3.3V±5%
5 Reset I External Reset Signal
6 NC
7 NC
8 NC
9 NC
10 NC
11 TX0 O Serial Port 0
12 RX0 I Serial Port 0
13 NC
14 TX1 O Serial Port 1
15 RX1 I Serial Port 1
16 NC
17 NC
18 GND G Reference Ground
19 Time Mark O One pulse per second
20 GND G Reference Ground
Table 1-2 Switch U4
Pin # Signal Name 0/1 Description Characteristics
1 GPIO-0 GPIO input/output Switch:
0:Low 1:High CMOS
TTL Level
2 GPIO-4 GPIO input/output Switch:
0:Low 1:High CMOS
TTL Level
3 N.C
4 N.C
5 GPS_3V3 Power supply for GPS section Switch:
0:Low 1: DC 3.3V
output
6 N.C
7 N.C
8 RF_Bias RF_Bias voltage switch 0: open. No voltage
provide antenna.
1:Provide 2.85V to

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MEB-1000 User Manual
antenna.
Table 1-3 Connector:
Pin # Description Characteristics
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)

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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
1 Chipset MediaTek MT3179 (RF )& MT3301 (Digital)
2 Frequency L1 1575.42MHz.
3 Code C.A. Code.
4 Channels 32
5 Sensitivity (Acquisition) -130dBm.
6 Cold start 36 sec (open sky)
7 Warm start 35 sec (open sky)
8 Hot start 1 sec (open sky)

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MEB-1000 User Manual
9 Reacquisition < 1sec
10 Position accuracy 3 meters 2D RMS(w/o aid)
11 Maximum altitude 18000 m
12 Maximum velocity 515 m/s
13 Trickle power mode N/A
14 Update rate 1Hz
15 Testability N/A
16 Protocol setup It can store the protocol setup in the SRAM and Flash memory.
17 DGPS 1.WAAS, EGNOS
2.RTCM protocol
Interface
18 LNA No LNA
19 I/O Pin 31pin
Mechanical requirements
20 Weight ≦3.5g
Power consumption
21 Vcc DC 3.3 ±5%
22 Current
GPS :
< [email protected] (ACQ w/o ext. Antenna)
< [email protected] (Tracking w/o ext. Antenna)
Environment
23 Operating temperature -30 ~ 85℃
24 Storage temperature -40 ~ 85℃

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MEB-1000 User Manual
1.8 Application Circuit
Figure 4 Application Circuit
Note:
(1) Serial Interface:
(Ⅰ)The TXA & RXA pin is recommended to connect to serial resistance(220
Ω) and pull up (10KΩ). It can increase the stability of serial data.
(Ⅱ)The TXB & RXB pin is recommended to connect to serial resistance(220
Ω) and pull up (10KΩ), if use the DGPS output.
If no use DGPS output, it don’t connect anything.
(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:
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

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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.

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MEB-1000 User Manual
1.9 Recommended Layout PAD
TOP View
Figure 5 Recommended Layout Pad

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MEB-1000 User Manual
1.10 Mechanical Layout
P1
P16
P31
P17
Unit：mm
Figure 6 Mechanical Layout
1.11 Hardware Interface
Interface Pin Number:

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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
DC +3.3V±5%
2 GND G Ground Reference Ground
3 N.C
4 RXA I Serial port A VVVVV ILIH 8.00.3V-26.3 ≤≤≥≥
5 TXA O Serial port A VVVVV OLOH 4.00.3V-4.215.3 ≤≤≥≥
6 TXB O Serial port B VVVVV OLOH 4.00.3V-4.215.3 ≤≤≥≥
7 RXB I Serial port B VVVVV ILIH 8.00.3V-26.3 ≤≤≥≥
8 N.C
9 RF_ON O Indicates power
state of RF part
VVVV OLOH 085.2 =
=
10 GND G Ground Reference Ground
11 N.C
12 N.C
13 GND G Ground Reference Ground

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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
Bias voltage
Receiving DC power supply for active
antenna bias.
20 VCC_RF_OUT O Supply Antenna
Bias voltage
%585.2
±
=
VVO
Current<35mA
21 V_RTC_3V3 I Backup voltage
supply 10uACurrent
3.6V~1.6DC
≤
+
+
22 Reset I Reset (Active
low)
VVVVV ILIH 8.00.3V-26.3 ≤≤≥≥
23 N.C
24 N.C
25 GPIO4 I/O General purpose
I/O
VVVVV ILIH 8.00.3V-26.3 ≤≤≥≥
VVVVV OLOH 4.00.3V-4.215.3 ≤≤≥≥
26 GPIO0 I/O General purpose
I/O
VVVVV ILIH 8.00.3V-26.3 ≤≤≥≥
VVVVV OLOH 4.00.3V-4.215.3 ≤≤≥≥
27 N.C
28 N.C
29 PPS O One pulse per
second
VVVVV OLOH 4.00.3V-4.215.3 ≤≤≥≥
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

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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 [email protected] 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

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MEB-1000 User Manual
Several I/Os are connected to the digital interface connector for custom
applications.

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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
hhmmss.sss
Latitude 3723.2475 ddmm.mmmm
N/S Indicator N N=north or S=south
Longitude 12158.341
6
Dddmm.mmmm
E/W Indicator W E=east or W=west
Position Fix Indicator 1 See Table 2-1
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

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MEB-1000 User Manual
Units M 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 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