RoyalTek MEB-1315 User manual

RoyalTek Confidential
MEB-1315 User Manual
MEB-1315 User Manual
Version 1.0
2009/01/16
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.
4F., No.188, Wen Hwa 2nd Rd., Kuei Shan,
Tao Yuan 333, Taiwan
TEL: [phone]
FAX: [phone]
http://www.royaltek.com/contact

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MEB-1315 User Manual
Content
1.Introduction ............................................................................................................................ 2
1.1 Product Applications ........................................................................................................... 2
1.2 Product Pictures................................................................................................................... 3
1.3 The interface Board Pin Definition ..................................................................................... 4
1.4 MEB-1315 Series Block Diagram....................................................................................... 6
1.5 MEB-1315 Technical Specification..................................................................................... 7
1.6 Application Circuit .............................................................................................................. 9
1.7 Recommend Layout PAD...................................................................................................11
1.8 Mechanical Dimension...................................................................................................... 12
1.9 Hardware interface ............................................................................................................ 13
2 Software Interface.......................................................................................................... 16
3 RoHS Reflow Diagram.................................................................................................. 22
4 Package Specification and Order Information............................................................... 23
5 Contact Royaltek ........................................................................................................... 23
6 Revision History............................................................................................................ 23

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MEB-1315 User Manual
1 1.Introduction
RoyalTek MEB-1315 small form factor board is the newest generation of RoyalTek GPS
module. The module is powered by latest MTK single chip and 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.
Product Features
 SMT type with stamp holes
 Support USB/TTL interface
 TCXO design
 NMEA-0183 compliant protocol/ customize protocol
 Enhanced algorithm for navigation stability
 Excellent sensitivity for urban canyon and foliage environments.
 Auto recovery while RTC crashes
1.1 Product Applications
 Automotive navigation
 Personal positioning and navigation
 Marine navigation
 MID or Net book application

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1.2 Product Pictures
(1) MEB-1315
(2) MEB-1315 Interface board
(3) Connection with REV-2000 evaluation Kit
Pin 1

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1.3 The interface Board Pin Definition
(1) J1 Pin Definition:
Contact
Number
Signal Name
Descriptions Characteristic
1 N.C. Connect to Test point Non-Used
2 D+ USB Device Port Data + I/O
3 D- USB Device Port Data - I/O
4 VDDBUS Device power Supply Power：3V3±5%
5 GND GND GND
6 N.C. N.C. Non-Used
7 TXA Data Transport out
Output
VOH (max. +3.1V；min. +2.4 V)
VOL (max. +0.4V；min. -0.3 V)
8 RXA Data Receiver in
Input
VIH (max. +3.6V；min. +2.0 V)
VIL (max. +0.8V；min. -0.3 V)
9 N.C. Connect to Test point Non-Used
10 GND GND GND
VOH：Output High-level Voltage
VOL：Output Low-level Voltage
VIH：Input High-level Voltage
VIL ：Input Low-level Voltage
Pin 1
J 1 10pin Connector
J2
IPEX connector

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(2) J2 IPEX connector
Pin# Signal Name
Descriptions Characteristic
1 RF Signal RF Signal feed in RF Signal
2 GND GND GND
Pin 1
Pin 2

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1.4 MEB-1315 Series Block Diagram
System block diagram description:
a. External antenna.
b. 4 Mega bits flash memory.
c. 22 pin I/O pin.
Antenna
MT
3329
COM Port
Internal
SAW
LNA
USB Port
MEB
-
1315

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MEB-1315 User Manual
1.5 MEB-1315 Technical Specification
Impedance：
：：
：50Ω
No Function Specification
GPS
1 Chipset - MTK MT3329
The single chip solution is offered as a 81-pin TFBGA
(6.2x6.2x1.3mm)
Internal Memory: Flash type on 4Mb
2 Frequency - L1, 1,575.42 MHz
3 Channel - 22 tracking/ 66 acquisition-channel
4 C/A Code - 1,023 MHz
5 Sensitivity Tracking – 165 dBm/Acquisition -148dBm
6 TTFF Fix time(chipset
open sky)
- Hot start: 1s
- Warm start: 33s
- Cold start: 36s
7 Accuracy - Position: within 10m for 90%
- Velocity: 0.1m/s
8 Interface Protocol -
NMEA 0183 standard V3.01 and backward
compliance
GGA(1),GLL(1),GSA(1),GSV(1),RMC(1),VTG(1),
9600bps
9 TCXO - 16.369MHz
10 Navigation applications -
SBAS (WAAS, EGNOS, GAGAN, MSAS), DGPS
(RTCM), and AGPS.
11 LNA (INTERNAL) Gain: 19 dB (Typ.)
Noise Figure ≦2.5 dB(Max)
Interface
12 I/O Pin 22pin USB/TTL
Power consumption
13 Voltages 3.3V±5%
14 System Currents Avg. 55mA @3.3V w/o ext. Antenna
Environment
15 Temperature - Operating : -40 ~ 85℃
- Storage : -40 ~ 85℃
16 Humidity ≦95%

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Mechanical requirements
17 Dimension (mm) -13±0.2 x 15±0.2 x 2.3 ±0.2mm
18 Weight ≦0.8g

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1.6 Application Circuit
Reference schematic:
RXB R4 0 Ω
R10
open
50 ohm trace
C12
10uF
TP4 1
C11
10uF
L5
39nH
U2
OPEN(MEB-1315)
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
21 22
RXB
TXB
PPS
TXA
RXA
GPIO-10
GPIO-0
GPIO-1
NC
/STANDBY V_RTC_3V3
VIN_3V3
VDD_USB
VDD_DM
VDD_DP
NC
RF_VOUT
GND
GPS_RF_IN
GND
GND GND
R3
OPEN +3V3
TXA
+3V3
C10
0.1uF
RXA
TP3 1
+3V3
Active antenna
R5 0 Ω
R12
10k
RF matching circuit
U306
1
2 3
TP5 1
R6
OPEN
USB+
Battery
R11 470 ohm
C10
0.1uF
R7 33 Ω
R3
open
U304
ROHM RB705D
1
3
2
TXB
R8 33 Ω
U305
ROHM RB705D
1
3
2
+3V3(alway s)
USB-
GAIN:1 stage LNA 17dB
J2
U.FL-R-SMT3
2
1
Note:
(1) Ground Planes:
These pins(18、20、21、22) should be connected to ground.
(2) Serial Interface:
(Ⅰ)The TXA pin is the serial output data. Default output GPS protocol. (NMEA
Sentence).
(Ⅱ). The RXA pin is the serial input data. Default output GPS protocol. (NMEA
Sentence).
(Ⅲ) The TXB pin is the serial output data (Default Null)
(Ⅳ) The RXB pin is the serial input data (Default Null).
(3) Backup Battery:
It’s recommended to connect a backup battery to V_RTC_3V3 pin.
In order to enable the features of the warm start and hot start of the GPS receiver.
(4) RF_IN:
Connecting to the antenna has to be routed on the PCB. The transmission line must
to be control impedance from RF_IN pin to the antenna or antenna connector of

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MEB-1315 User Manual
your choice. (Impedance 50Ω)
(5) Power:
Connect VIN_3V3 pin to DC 3.3V. The power supply must add bypass capacitor
(10uF and 1uF). It can reduce the Noise from power supply and increase power
stability.
(6) GPIO:
The GPIO function is for customer application.
If the GPIO function is not used, it won’t connect anything.

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1.7 Recommend Layout PAD

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MEB-1315 User Manual
1.8 Mechanical Dimension

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1.9 Hardware interface
Pin definition
Pin
Signal Name
I/O
Description Characteristics
1.
RXB I
Serial port B VVVV ILIH 8.00.3V-,0.26.3 ≤≤≥≥
2.
TXB O
Serial port B VVVVV OLOH 4.03.0-,4.21.3 ≤≤≥≥
3.
PPS O
One pulse per
second
VVVVV OLOH 4.03.0-,4.21.3 ≤≤≥≥
4.
TXA O
Serial port A VVVVV OLOH 4.03.0-,4.21.3 ≤≤≥≥
5.
RXA I
Serial port A VVVV ILIH 8.00.3V-,0.26.3 ≤≤≥≥
6.
GPIO[10] I/O
General purpose I/O
VVVV ILIH 8.00.3V-,0.26.3 ≤≤≥≥
VVVVV OLOH 4.03.0-,4.21.3 ≤≤≥≥
7.
GPIO[0] I/O
General purpose I/O
VVVV ILIH 8.00.3V-,0.26.3 ≤≤≥≥
VVVVV OLOH 4.03.0-,4.21.3 ≤≤≥≥
8.
GPIO[1] I/O
General purpose I/O
VVVV ILIH 8.00.3V-,0.26.3 ≤≤≥≥
VVVVV OLOH 4.03.0-,4.21.3 ≤≤≥≥
9.
N.C x
x x
10.
N.C x
x x

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MEB-1315 User Manual
11.
V_BATTERY
I
Backup voltage
supply 6uA(Max)Current
3.6V~2.5DC
≤
+
+
12.
VIN_3V3 I
DC Supply Voltage
input
DC +3.3V±5%
13.
VDD_USB
I
DC Supply
for USB
DC +3.3V±5%
14.
USB_DM I/O
USB_D- Standard USB Interface
15.
USB_DP I/O
USB_D+ Standard USB Interface
16.
N.C x
x x
17.
RF_VOUT
O
Supply Antenna 2V8@20mA
18.
GND G
Ground Reference Ground
19.
RF_IN I
GPS Signal input
50 Ω@1,575.42GHz
20.
GND G
Ground Reference Ground
21.
GND G
Ground Reference Ground
22.
GND G
Ground Reference Ground
VIN_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 reference ground.
RXA/B & TXA/B
This is as NEMA output and PMTK command input.
VDD_USB (+3.3V DC power Input)
This is the DC power supply input pin for USB.
VDD_DP & VDD_DM
This interface is automatically converted to COM port to HOST operating system.
Users can update firmware through this interface.
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).
RF_VOUT
This pin can provide maximum power 2.8V(TYP) for active antenna.
PPS
This pin provides one pulse-per-second output from the board, which is synchronized to
GPS time. This pin must pull down.

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V_RTC_3V3 (Backup battery)
This is the battery backup input, when main power is removed. Current draw is
6uA(Max).
The supply voltage should be between 2.5V and 3.6V.
GPIO Functions
Several I/Os are connected to the digital interface connector for customer applications.

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2 2. Software Interface
NMEA Protocol
NMEA Output Messages: the Engine board outputs the following messages as shown in
Table 1:
Table 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
GLL Geographic position – latitude/longitude
VTG Course over ground and ground speed
GGA-Global Positioning System Fixed Data
Table 2 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 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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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 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
6 Dead Reckoning Mode, fix valid
GSA-GNSS DOP and Active Satellites
Table 4 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 4 GSA Data Format
Name Example
Units
Description
Message ID $GPGSA
GSA protocol header
Mode 1 A See Table 5
Mode 2 3 See Table 6
ID of
Satellite
Used
07 Sv on Channel 1
ID of
Satellite
Used
02 Sv on Channel 2
…. ….
ID of
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

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＞
Table 5 Mode 1
Value Description
M Manual-forced to operate in 2D or 3D mode
A Automatic-allowed to automatically switch 2D/3D
Table 6 Mode 2
Value Description
1 Fix not available
2 2D
3 3D
GSV-GNSS Satellites in View
Table 7 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 7 GSV Data Format
Name Exampl
e
Units
Description
Message ID $GPGS
V
GSV protocol header
Total
Number of
Messages1
2 Range 1 to 3
Messages
Number1
1 Range 1 to 3
Satellites in
View
07
Satellite ID 07 Channel 1(Range 1 to 32)
Elevation 79 degrees
Channel 1(Range 00 to 90)
Azimuth 048 degrees
Channel 1(True, Range 000 to
359)
SNR (C/No) 42 dBHz
Channel 1(Range 0 to 99, null
when not tracking)
Satellite ID 27 Channel 4(Range 01 to 32)

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Elevation 27 degrees
Channel 4(Range 00 to 90)
Azimuth 138 degrees
Channel 4(True, Range 000 to
359)
SNR (C/No) 42 dB-Hz
Channel 4(Range 00 to 99, null
when not tracking)
Checksum *71
＜CR＞＜LF＞
End of message termination
1Depending on the number of satellites tracked multiple messages of GSV data
may be required.
RMC-Recommended Minimum Specific GNSS Data
Table 8 contains the values of the following example:
$GPRMC, 161229.487, A, 3723.2475, N, 12158.3416, W, 0.13, 309.62, 120598, ,*10
Table 8 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 True
Course Over
Ground
309.62 degrees
Date 120598 ddmmyy
Magnetic
Variation
degrees
Variation sense E=east or W=west (Not shown)
Mode A A=Autonomous, D=DGPS,
E=DR
Checksum *10
<CR><LF> End of message termination
VTG-Course Over Ground and Ground Speed