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: 886-2-77215000
FAX: 886-2-77215666
文件編號：
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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
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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
1
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1.3 Product Pictures
(1) MEB-1000
pin1
Figure 1 MEB-1000 Picture
(2) MEB-1000 Interface board
SMARF connector (J1)
J2 CONNECTOR
Pin 1
U4
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 19
Pin 20
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
3.3V±5%
ANTPWR
NC
I
DC Supply Voltage Output
1
2
3
DC +1.6 ~ +3.6V
VBAT
I
RTC Backup Battery
Supply
2
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3.3V±5%
VCC
Reset
NC
I
I
DC Supply Voltage Output
External Reset Signal
4
5
6
NC
7
NC
8
NC
9
NC
10
11
12
13
14
15
16
17
18
19
20
TX0
RX0
NC
O
I
Serial Port 0
Serial Port 0
TX1
RX1
NC
O
I
Serial Port 1
Serial Port 1
NC
GND
Time Mark
GND
G
O
G
Reference Ground
One pulse per second
Reference Ground
Table 1-2 Switch U4
Description
Pin # Signal Name 0/1
Characteristics
Switch:
GPIO-0
GPIO input/output
1
0:Low 1:High CMOS
TTL Level
GPIO-4
GPIO input/output
Switch:
2
0:Low 1:High CMOS
TTL Level
N.C
3
4
5
N.C
GPS_3V3
Power supply for GPS section Switch:
0:Low 1: DC 3.3V
output
N.C
6
7
8
N.C
RF_Bias
RF_Bias voltage switch
0: open. No voltage
provide antenna.
1:Provide 2.85V to
3
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antenna.
Table 1-3 Connector:
Pin # Description
Characteristics
GPS RF Connector
1575.42MHz
J1
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
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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
GPS receiver
Function
Specification
MediaTek MT3179 (RF )& MT3301 (Digital)
Chipset
1
2
3
4
5
6
7
8
Frequency
Code
L1 1575.42MHz.
C.A. Code.
Channels
32
Sensitivity (Acquisition)
Cold start
-130dBm.
36 sec (open sky)
35 sec (open sky)
1 sec (open sky)
Warm start
Hot start
5
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Reacquisition
Position accuracy
Maximum altitude
Maximum velocity
Trickle power mode
Update rate
< 1sec
9
3 meters 2D RMS(w/o aid)
10
11
12
13
14
15
16
17
18000 m
515 m/s
N/A
1Hz
Testability
N/A
It can store the protocol setup in the SRAM and Flash memory.
1.WAAS, EGNOS
Protocol setup
DGPS
2.RTCM protocol
Interface
LNA
I/O Pin
No LNA
31pin
18
19
Mechanical requirements
Weight
Power consumption
≦3.5g
20
Vcc
DC 3.3 ±5%
21
22
Current
GPS :
< [email protected] (ACQ w/o ext. Antenna)
< [email protected] (Tracking w/o ext. Antenna)
Environment
-30 ~ 85℃
Operating temperature
Storage temperature
23
24
-40 ~ 85℃
6
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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
7
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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
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1.9 Recommended Layout PAD
TOP View
Figure 5 Recommended Layout Pad
9
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1.10 Mechanical Layout
P17
P16
P31
P1
Unit：mm
Figure 6 Mechanical Layout
1.11 Hardware Interface
Interface Pin Number:
10
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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
Ground
DC +3.3V±5%
2
3
4
5
6
7
8
9
GND
N.C
G
Reference Ground
3.6V ≥ VIH ≥ 2V
- 0.3V ≤ VIL ≤ 0.8V
RXA
TXA
TXB
RXB
N.C
I
Serial port A
Serial port A
Serial port B
Serial port B
3.15V ≥ VOH ≥ 2.4V - 0.3V ≤ VOL ≤ 0.4V
O
O
I
3.15V ≥ VOH ≥ 2.4V - 0.3V ≤ VOL ≤ 0.4V
3.6V ≥ VIH ≥ 2V
- 0.3V ≤ VIL ≤ 0.8V
VOH = 2.85V
VOL = 0V
RF_ON
O
G
Indicates power
state of RF part
Ground
10
11
12
13
GND
N.C
Reference Ground
N.C
GND
G
Ground
Reference Ground
11
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14
15
N.C
GND
G
Ground
Ground
Reference Ground
Reference Ground
16
17
18
19
GND
G
I
GPS_RF_IN
GND
GPS Signal input 50 Ω @1.57542GHz
Ground Reference Ground
Active Antenna Receiving DC power supply for active
G
I
V_ANT_IN
Bias voltage
Supply Antenna
Bias voltage
Backup voltage
supply
antenna bias.
VO = 2.85V ± 5%
Current<35mA
DC +1.6 ~ +3.6V
Current ≤ 10uA
3.6V ≥ VIH ≥ 2V
20
21
22
VCC_RF_OUT
V_RTC_3V3
Reset
O
I
- 0.3V ≤ VIL ≤ 0.8V
I
Reset (Active
low)
23
24
25
N.C
N.C
3.6V ≥ VIH ≥ 2V
- 0.3V ≤ VIL ≤ 0.8V
GPIO4
I/O General purpose
3.15V ≥ VOH ≥ 2.4V - 0.3V ≤ VOL ≤ 0.4V
3.6V ≥ VIH ≥ 2V - 0.3V ≤ VIL ≤ 0.8V
3.15V ≥ VOH ≥ 2.4V - 0.3V ≤ VOL ≤ 0.4V
I/O
26
GPIO0
I/O General purpose
I/O
27
28
29
N.C
N.C
PPS
3.15V ≥ VOH ≥ 2.4V - 0.3V ≤ VOL ≤ 0.4V
O
G
One pulse per
second
30
31
GND
N.C
Ground
Reference Ground
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
12
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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
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
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Several I/Os are connected to the digital interface connector for custom
applications.
14
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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
GGA
Description
Global positioning system fixed data
GNSS DOP and active satellites
GNSS satellites in view
GSA
GSV
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
Message ID
Example
Units
Description
GGA protocol header
hhmmss.sss
$GPGGA
UTC Position
161229.48
7
Latitude
3723.2475
ddmm.mmmm
N/S Indicator
Longitude
N
N=north or S=south
Dddmm.mmmm
12158.341
6
W
1
E/W Indicator
Position Fix Indicator
Satellites Used
HDOP
E=east or W=west
See Table 2-1
07
1.0
Range 0 to 12
Horizontal Dilution of
Precision
MSL Altitude
Units
9.0
M
meters
meters
meters
Geoid Separation
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Units
M
meters
Null fields when DGPS is not
used
Age of Diff. Corr.
second
Diff. Ref. Station ID
Checksum
0000
*18
＜CR＞＜LF＞
End of message termination
Table 2-3 Position Fix Indicators
Description
Value
0
1
Fix not available or invalid
GPS SPS Mode, fix valid
2
Differential GPS, SPS Mode, fix valid
Not Supported GPS PPS Mode, fix valid
Dead Reckoning Mode, fix valid
3-5
6
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
Message ID
Mode 1
Example Units
Description
GSA protocol header
$GPGSA
A
3
See Table 4-2
Mode 2
See Table 4-1
Satellite Used
Satellite Used
….
07
02
Sv on Channel 1
Sv on Channel 2
….
Satellite Used
PDOP
Sv on Channel 12
Position Dilution of Precision
Horizontal Dilution of Precision
Vertical Dilution of Precision
1.8
1.0
1.5
*33
HDOP
VDOP
Checksum
＜CR＞＜LF＞
End of message termination
Table 2-5 Mode 1
Value
Description
1
2
Fix not available
2D
16
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3
3D
Table 2-6 Mode 2
Value
M
Description
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
Message ID
Number of
Messages1
Messages
Number1
Example Units
Description
GSV protocol header
$GPGSV
2
Range 1 to 3
1
Range 1 to 3
Satellites in View
Satellite ID
Elevation
07
07
Channel 1(Range 1 to 32)
79
048
42
degrees Channel 1(Maximum 90)
degrees Channel 1(True, Range 0 to 359)
dBHz Range 0 to 99, null when not tracking
….
Azimuth
SNR (C/No)
….
Satellite ID
Elevation
27
27
Channel 4(Range 1 to 32)
degrees Channel 4(Maximum 90)
degrees Channel 4(True, Range 0 to 359)
dBHz Range 0 to 99, null when not tracking
Azimuth
138
42
SNR (C/No)
Checksum
＜CR＞＜LF＞
*71
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
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
17
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Table 2-8 GGA Data Format
Name
Message ID
UTC Position
Status
Example
$GPRMC
161229.487
A
Units
Description
RMC protocol header
hhmmss.sss
A=data valid or V=data not valid
ddmm.mmmm
Latitude
3723.2475
N
N/S Indicator
Longitude
N=north or S=south
dddmm.mmmm
12158.3416
W
E/W Indicator
Speed Over Ground
Course Over
Ground
E=east or W=west
0.13
knots
degrees True
309.62
Date
120598
ddmmyy
degrees E=east or W=west
A=Autonomous, D=DGPS, E=DR
Magnetic Variation
Mode
A
Checksum
*10
18
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3 RoHS Reflow Diagram
Critical Zone
260oC,10sec max
TL to TP
TP
20~40sec
o
Ramp-down
6oC/sec
o
Ramp-up
3oC/sec max
TL
o
o
60~150sec
Tsmax
o
Tsmin
Ts Pretest
60~180sec
T25oC to peak, 480 sec max
Time
Figure 8 RoHS Reflow Diagram
19
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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
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5 Contact Information
Contact: [email protected]
Headquarter:
Address: 8F, 256 Yang Guang Street, Neihu Chiu, Taipei, Taiwan
Tel: 886-2-77215000
Fax: 886-277215666
6 Revision History
Title
MEB-1000 GPS Receiver Module
Doc Type User Manual
Revision
Date
Number
Author
Change notice
1.0
2007/05/25
Amy Liu
Initial Release
21
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