RoyalTek REB-3310 User manual

REB-3310 Operational Manual
REB-3310 Operational Manual
Version 1.0
2005/4/7
This document contains information highly confidential to RoyalTek Company
LTD (RoyalTek). It is provided for the sole purpose of the business discussions
between supplier 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, R.O.C.
TEL: [phone]
FAX: [phone]
http://www.royaltek.com/contact
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REB-3310 Operational Manual
RoyalTek GPS Module: REB-3310 Operational Manual
INTRODUCTION.................................................................................................................... 3
PRODUCT FEATURES ....................................................................................................…. 3
PRODUCT APPLICATIONS .................................................................................................. 3
PRODUCT PICTURE................................................................................................................4
REB-3310 SERIES SYSTEM BLOCK DIAGRAM.................................................................. 6
REB-3310 TECHNIQUE SPECIFICATION..........................................................................…. 7
APPLICATION CIRCUIT .....................................................................................………….. 8
RECOMMENDED LAYOUT PAD ............................................................................………….. 9
GPS ANTENNA SPECIFICATION ................................................ ........................................ 10
MECHANICAL LAYOUT .......................................................................................……….…...11
HARDWARE INTERFACE …….............................................. ................................................12
DEFINITION OF PIN ASSIGNMENT ........................................................ ......................……13
SOFTWARE INTERFACE................................................................................…… ……….…15
NMEA V3.0 PROTOCOL..................................................................................…………….…15
GPS RECEIVER USER’S TIPS......................................................................................……..20
MTBF ESTIMATION………………….............................................. .......................……......… 21
PACKAGE SPECIFICATION AND ORDER INFORMATION................. ................……......…21
CONTACT INFORMATION SECTION....................................................................……......…21
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REB-3310 Operational Manual
RoyalTek GPS Module: REB-3310 Operational Manual
Introduction
RoyalTek REB-3310 low power and small form factor board is the newest generation
of RoyalTek GPS Receiver. The GPS receiver is powered by SiRF Star III technology
and RoyalTek proprietary navigation algorithm that providing you more stable
navigation data. The smallest form factor and miniature design is the best choice to be
embedded in a portable device like PDA, personal position and navigation like
personal locator, speed camera detector and vehicle locator. The excellent sensitivity
of REB-3310 gets the great performance when going though the urban canyon and
foliage.
Product Features
 20 parallel channels
 Extreme fast TTFF at low signal level
 Operable from 3.3V/72mA continuous mode.
 SMT type with stamp holes
 Pin reserved for Backup battery and RF connector
 TCXO design
 7 I/O lines(GPIO) available to connect
 0.1 second reacquisition time
 Small form factor.
 NMEA-0183 compliant protocol/custom protocol.
 Enhanced algorithm for navigation stability
 Excellent sensitive for urban canyon and foliage environments.
 SBAS (WAAS, EGNOS and MSAS) support
 Auto recovery while RTC crashes
 Trickle power supported
 ARM 7 CPU core accessible.
 4/8/16Mbits Flash Memory.
Product applications
 Automotive navigation
 Personal positioning and navigation
 Marine navigation
 Timing application
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REB-3310 Operational Manual
Product Picture
REB-3310
Pin16 Pin 15
Pin 32 Pin 1
REB-3310 Interface Board
The interface board
PIN REB-3300 REB-3310
1 VCC VCC_IN
2 GND GND
3 Boot select BOOT
4 RXA RXA
5 TXA TXA
6 TXB TXB
7 RXB RXB
8 GPIO_3 GPIO_14
9 RF_ON RF_ON
10 GND GND
11 GND_A GND_A
12 GND_A GND_A
13 GND_A GND_A
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REB-3310 Operational Manual
14 GND_A GND_A
15 GND_A GND_A
16 GND_A GND_A
17 RF_IN RF_IN
18 GND_A GND_A
19 V_ANT_IN V_ANT
20 VCC_RF VCC_RF
21 V_BAT Battery
22 Reset IC_RESET
23 GPIO_10 GPIO_10
24 GPIO_6 GPIO_1
25 GPIO_5 GPIO_5
26 GPIO_7 GPIO_0
27 GPIO_13 GPIO_13
28 GPIO_15 GPIO_15
29 PPS TIMEMARK
30 GND GND
RoyalTek Evaluation Kit REV-2000 for REB-3310
(Please refer to RoyalTek Evaluation Kit REV-2000 for REB-3310 Operational Manual
for more information)
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REB-3310 Operational Manual
REB-3310 Series System Block Diagram
REB-3310 engine board consists of SiRF star III chipset technology; 4/8/16Mbits flash memory,
and proprietary software. The system is described as follows.
a. Support external active patch antenna
b. Support 4/8/16 Mega bits flash memory
c. 30 I/O pins
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REB-3310 Operational Manual
REB-3310 Technique Specification
Impedance：50Ω
No Function Specification
GPS receiver
1 Chipset SiRF Star III
2 Frequency L1 1575.42MHz.
3 Code C.A. Code.
4 Channels 20
5 Sensitivity (Tracking) -159dBm.
6 Cold start 37 sec
7 Warm start 35 sec
8 Hot start 1 sec
9 Reacquisition 0.1sec typical
10 Position accuracy ≦25m CEP.
11 Maximum altitude 18000 m
12 Maximum velocity 514 m/s
13 Trickle power mode Duty cycle ≦34%. (Variable)
Default: disable (option: enable)
14 Update rate Continuous operation: 1Hz
15 Testability It shall be able to be tested by SiRF test mode 4 and single
channel simulator.
16 Protocol setup It shall store the protocol setup in the SRAM memory.
17 DGPS 1.WAAS, EGNOS
2.RTCM protocol
Interface
18 I/O Pin 30pin stamp holes
Mechanical requirements
19 Weight ≦3.5g
Power consumption
20 Vcc DC 3.3 ±5%
21 Current REB-3310:
Current [email protected] typical (w/o ext. antenna)
22 Trickle power mode Average current ≦[email protected] typical (w/o ext. Antenna)
Environment
23 Operating temperature -30 ~ 85℃
24 Humidity ≦95%
25 Interface Protocol 1. NMEA 0183 ver 3.0, GGA, GSA, RMC and GSV once per
2. SiRF Protocol
3. 4800 bps, 8 data bits, no parity, 1 stop bits
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REB-3310 Operational Manual
Application Circuit
(1) Ground Planes:
REB-3310 GPS receiver needs two different ground planes. The GND_A pin(11、
12、13、14、15、16、18) shall be connect to analog ground.
The GND pin(2、10、30) connect to digital ground.
(2) Serial Interface:
The Serial interface pin(RXA、TX1、TXB、RXB) is recommended to pull up(10KΩ).
It can increase the stability of serial data.
(3) Backup Battery:
It’s recommended to connect a backup battery to V_BAT.
In order to enable the warm 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, shall need to add a bypassing capacitor (10uF) at V_bat
trace. It can reduce noise and increase the stability.
(4) Antenna:
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.
(5) Active antenna bias voltage:
The Vcc_RF pin (pin 20) is providing voltage 3.0V. If you use active antenna, you
can connect this pin to V_ANT_IN pin (pin 19) to provide bias voltage of active
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REB-3310 Operational Manual
antenna. The bias voltage will through RF_IN pin to provide active antenna bias
voltage from Vcc_RF pin.
If your bias voltage of active antenna isn’t 3.0V, you can input bias voltage to
V_ANT_IN pin (pin 19). And input bias voltage of you need. It can open if you use
passive antenna. The input bias voltage will through RF_IN pin to provide active
antenna bias voltage from V_ANT_IN pin.
The maximum power consumption of active antenna is about 100mW
(6) Power:
Connect Vcc pin to DC 3.3V.The power supply must add bypassing capacitor (10uF
and 1uF). It can reduce the Noise from power supply and increase power stability.
Recommended layout PAD
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REB-3310 Operational Manual
GPS Antenna Specification (Recommendation)
 Active patch antenna
 Receiving freq. 1575.42 +/-1.032MHz
 Polarization RHCP
 Output impedance 50 Ohm
 2 stage LNA
LNA's gain ≧20dB and ≦26dB, noise figure ≦2.0dB
 Connection: surface mounted on main PCB
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REB-3310 Operational Manual
Mechanical Layout
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REB-3310 Operational Manual
Hardware interface
Definition of Pin assignment
Pin # Signal Name I/O Description Characteristics
1 VCC I DC Supply Voltage
input
DC +3.3V±5%
2 GND G Ground Digital Reference Ground
3 Boot select I Boot mode VCCVVVCCVV ILIH *3.0*7.0 ≤≥
4 RXA I Serial port A VCCVVVCCVV ILIH *3.0*7.0 ≤≥
5 TXA O Serial port A VVVV OLOH 4.04.2 ≤≥
6 TXB O Serial port B VVVV OLOH 4.04.2 ≤≥
7 RXB I Serial port B VCCVVVCCVV ILIH *3.0*7.0 ≤≥
8 GPIO14 I/O General –purpose I/O
VVVV
VCCVVVCCVV
OLOH
ILIH 4.04.2
*3.0*7.0
≤≥
≤≥
9 RF_ON O Indicates power state
of RF part VVVV OLOH 085.2 =
=
10 GND G Digital Ground Digital Reference Ground
11
|
16
GND_A G Analog Ground Analog Reference Ground
17 RF_IN I GPS Signal input 50 Ω@1.57542GHz
18 GND_A G Analog Ground Analog Reference Ground
19 V_ANT_IN I Active Antenna Bias
voltage
Receiving DC power supply for active antenna
bias.
20 VCC_RF O Supply Antenna Bias
voltage VVO0.3
=
±0.3
21 V_BAT I Backup voltage supply
battery)(w/o10uACurrent
3.6V~2.6DC
≤
+
+
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REB-3310 Operational Manual
22 Reset I Reset (Active low) 8.02.3VVIH VVIL
<
>
23 GPIO10 I/O General purpose I/O
VVVV
VCCVVVCCVV
OLOH
ILIH 4.04.2
*3.0*7.0
≤≥
≤≥
24 GPIO1 I/O General purpose I/O
VVVV
VCCVVVCCVV
OLOH
ILIH 4.04.2
*3.0*7.0
≤≥
≤≥
25 GPIO5 I/O General purpose I/O
VVVV
VCCVVVCCVV
OLOH
ILIH 4.04.2
*3.0*7.0
≤≥
≤≥
26 GPIO0 I/O General purpose I/O
(support continuous
power mode only) VVVV
VCCVVVCCVV
OLOH
ILIH 4.04.2
*3.0*7.0
≤≥
≤≥
27 GPIO13 I/O General purpose I/O
VVVV
VCCVVVCCVV
OLOH
ILIH 4.04.2
*3.0*7.0
≤≥
≤≥
28 GPIO15 I/O General purpose I/O
VVVV
VCCVVVCCVV
OLOH
ILIH 4.04.2
*3.0*7.0
≤≥
≤≥
29 PPS O One pulse per second VVVV OLOH 4.04.2 ≤≥
30 GND G Digital Ground Digital Reference Ground
Definition of Pin assignment
VCC (+3.3V DC power Input)
This is the main DC power supply input pin. It provides voltage to module.
GND
GND provides the ground for digital part.
Boot select
Set this pin to high for programming flash.
RXA
This is the main receiver channel and is used to receive software commands to
the board from SIRFdemo software or from user written software.
PS: Pull up if not used.
RXB
This is the auxiliary receiving channel and is used to input differential
corrections to the board to enable DGPS navigation.
PS: Pull up if not used.
TXA
This is the main transmitting channel and is used to output navigation and
measurement data to SiRFdemo or user written software.
TXB
For user’s application (not currently used).
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REB-3310 Operational Manual
RF_ON
This pin indicates state of RF voltage.
RF_IN
This pin receiver signal of GPS analog .due to the RF characteristics of the
signal the design has to certain criteria. The line on the PCB from the
antenna(or antenna connector) has to be a controlled impedance line
(Microstrip at 50Ω).
V_ANT_IN
This pin is reserved an external DC power supply for active antenna.
If using 3.0V active antenna, pin 19 has to be connected to pin 20.
If using 3.3V or 12V active antenna, this pin has to be connected to 3.3V or 5V
power supply.
VCC_RF
This pin provides DC voltage 3.0 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.
Backup battery (V_BAT)
This is the battery backup input that powers the SRAM and RTC when main
power is removed. Typical current draw is 10uA.
Without an external backup battery or super cap, the TMP will execute a cold
start after every power on. To achieve the faster start-up offered by a hot or
warm start, either a battery backup must be connected or a super cap installed.
To maximize battery lifetime, the battery voltage should not exceed the supply
voltage and should be between 2.5V and 3.6V.
With the super cap (B1) installed, and after at least ten minutes of continuous
operation, the data retention is about seven hours.
Note that even though all other components are rated at –30 to +85 deg C, a
typical super cap is specified over a temperature range of –25 to +70 deg C and
a typical rechargeable Lithium battery is over –20 to +70 deg C.
GPIO Functions
Several I/Os are connected to the digital interface connector for custom
applications.
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REB-3310 Operational Manual
Software Interface
NMEA V3.0 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, GLL, GSA, GSV, RMC and VTG.
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
GLL Geographic position – latitude / longitude
GSA GNSS DOP and active satellites
GSV GNSS satellites in view
RMC Recommended minimum specific GNSS data
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 161229.487 hhmmss.sss
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
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
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REB-3310 Operational Manual
16
Units M meters
Geoid Separation meters
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 GPS PPS Mode, fix valid
GLL-Geographic Position –Latitude/Longitude
Table 3 contains the values of the following
Example: $GPGLL, 3723.2475, N, 12158.3416, W, 161229.487, A*2C
Table 3 GLL Data Format
Name Example Units Description
Message ID $GPGLL GLL protocol header
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
UTC Position 161229.487 hhmmss.ss
Status A A=data valid or V=data not valid
Checksum *2C
＜CR＞＜LF＞End of message termination

REB-3310 Operational Manual
17
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 GSADataFormat
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 4-1 Mode 1
Value Description
1 Fix not available
2 2D
3 3D
Table 4-2 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
Table 5 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

REB-3310 Operational Manual
18
Table 5 GGADataFormat
Name Example Units Description
Message ID $GPGSV GSV protocol header
Number of
Messages1
2 Range 1 to 3
Messages Number11 Range 1 to 3
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
＜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 6 contains the values of the following example:
$GPRMC, 161229.487, A, 3723.2475, N, 12158.3416, W, 0.13, 309.62, 120598, ,*10
Table 6 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

REB-3310 Operational Manual
19
Course Over
Ground
309.62 degrees True
Date 120598 ddmmyy
Magnetic Variation degrees E=east or W=west
Checksum *10
＜CR＞＜LF＞End of message termination
VTG-Course Over Ground and Ground Speed
Table 7 contains the values of the following example:
$GPVTG, 309.62, T, , M, 0.13, N, 0.2, K*6E
Table 7 VTG Data Format
Name Example Units Description
Message ID $GPVTG VTG protocol header
Course 309.62 degrees Measured heading
Reference T True
Course degrees Measured heading
Reference M Magnetic
Speed 0.13 knots Measured horizontal speed
Units N Knots
Speed 0.2 km/hr Measured horizontal speed
Units K Kilometer per hour
Checksum *6E
＜CR＞＜LF＞End of message termination

RoyalTek REB-3310 Operational Manual
GPS Receiver User’s Tip
1. GPS signal will be affected by weather and environment conditions, thus suggest to use the
GPS receiver under less shielding environments to ensure GPS receiver has better receiving
performance.
2. When GPS receiver is moving, it will prolong the time to fix the position, so suggest to wait for
the satellite signals to be locked at a fixed point when first power-on the GPS receiver to
ensure to lock the GPS signal at the shortest time.
3. The following situation will affect the GPS receiving performance:
a. Solar control filmed windows.
b. Metal shielded, such as umbrella, or in vehicle.
c. Among high buildings.
d. Under bridges or tunnels.
e. Under high voltage cables or near by radio wave sources, such as mobile phone base
stations.
f. Bad or heavy cloudy weather.
4. If the satellite signals can not be locked or encounter receiving problem (while in the urban
area), the following steps are suggested:
a. Please plug the external active antenna into GPS receiver and put the antenna on
outdoor or the roof of the vehicle for better receiving performance.
b. Move to another open space or reposition GPS receiver toward the direction with less
blockage.
c. Move the GPS receiver away from the interferences resources.
d. Wait until the weather condition is improved.
5. While a GPS with a backup battery, the GPS receiver can fix a position immediately at next
power-on if the build-in backup battery is full-recharged.
Copyright © 2004-2005, RoyalTek Company Ltd.