REB-4315 Operational Manual
REB-4315 Operational Manual
Version 0.2
2010/09/23
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: 886-3-3960001
FAX: 886-3-3960065
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REB-4315 Operational Manual
1 Introduction
RoyalTek REB-4315 is the newest generation of RoyalTek GPS module. The module is
powered by latest SiRF Star IV chip and RoyalTek proprietary navigation technology that
provides you with stable and accurate navigation data. SiRF Star IV is the high sensitivity
navigation engine tracks as low as -163dBm. 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
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48 track verification channels
Power supply 1.8 volts
SMT type with stamp holes
Small form factor with embedded SiRF Star IV technology.
Removes in-band jammers up to 80 dB-Hz, track up to 8 CW jammers
Embedded InstantFix CGEE and Reverse CGEE(3 days)
Enhanced algorithm for navigation stability
Excellent sensitivity for urban canyon and foliage environments.
1.1 Product Applications
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Automotive navigation
Personal positioning and navigation
Mobile gaming
Cameras
Asset Tracking
Others location-aware consumer devices
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2 Product Pictures
Pin 1
3 REB-4315 Block Diagram
System block diagram description:
a. External antenna.
b. 16 Mega bits flash memory
c. 22 pin I/O pins
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4 REB-4315 Technical Specification
Impedance：50Ω
No
Function
Specification
GPS receiver
SiRF Star IV, GSD4e
1
2
3
4
5
Chipset
Frequency
L1 1575.42MHz.
C.A. Code.
Code
Channels
48 track verification channels
Sensitivity (Acquisition)
It shall show C/No ≧ 40 dB-Hz when external power
= -130dBm.
6
7
8
9
Cold start
35 sec (50% -130dBm Fu 0.5 ppm Tu ±2s Pu 30km)
35 sec (50% -130dBm Fu 0.5 ppm Tu ±2s Pu 30km)
Warm start
Hot start
1 sec
(50% -130dBm Fu 0.5 ppm Tu ±2s Pu 30km)
Reacquisition
0.1sec typical
10 Position accuracy
11 Maximum altitude
12 Maximum velocity
13 Update rate
2.5meters(50% 24hr static, -130dBm)
18288 m
514 m/s
1Hz
14 Protocol setup
NMEA0183 standard V3.01 and
backward compliance-Adjustable by firmware
Interface
15 I/O Pin
22pins
Power consumption
16 Vcc
DC 1.8v(Max. 1.89v)
17 Current
GPS :
[email protected](Avg Acquisition w/o ext. Antenna)
[email protected](Avg Tracking w/o ext. Antenna)
[email protected](Average w/o ext. Antenna)
Hibernate Mode
18
Mechanical requirements
19 Dimension(mm)
20 Weight
13*15*2.2
≦3g
Environment
21 Operating temperature
22 Humidity
-30 ~ 85℃
≦95%
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5 Reference schematic:
For example:
Note:
(1) Ground Planes:
These pin(8、18、20、21、22) should be connect to ground.
(2) Serial Interface:
(Ⅰ)The TX pin is the serial output data.<UART data transmit (TX)>
(Ⅲ)The RX pin is the serial input data.< UART data receive (RX)>
(3) 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
your choice. (Impedance 50Ω)
Recommend used Active antenna (Gain 27).
(4) Power:
Connect VCC_IN_1V8 pin to DC 1.8V. The power supply must add bypass
capacitor(10uF and 1uF).It can reduce the Noise from power supply and increase
power stability.
Shutdown
Shutdown the REB-4315 module, don’t remove the Vcc_IN_1V8 Pin, must be
use on/off pulse make it into Hibernate mode.(It’s will keep the Warm start
and Hot start function work well)
(5) nRESET：
External reset input with internal pull-up, active low.
(6) ON/OFF：
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Input pulse is required to start the system, and switch the operation mode to
full-power mode or Hibernate mode.
(7) Wakeup：
Wakeup output indicate the chip states, when chip is working the output is high
level.
Wakeup output can control or enable the external regulator.(Ex. To control
external antenna power)
(8) Boot
Set this pin to high for programming flash.
Normal operation mode it is set to low voltage.
6
Power Design Consideration
Start the REB-4315(GSD4e)
After supply the 1.8v to the P12 VCC_IN_1V8,the REB-4315(GSD4e) awaits a pulse to
the ON_OFF input to start.
Switching to Hibernate State
By ON_OFF:assert an ON_OFF pulse when receiver is in full-power mode
Awakening from hibernate state
When the system is in simple hibernate state, an ON_OFF input pulse is required to start
the system.
Requirements:
‧ The REB-4315(GSD4e) is intended to be used with an always-ON, single voltage supply of
1.8V
‧ The REB-4315(GSD4e) requires an orderly shut-down process to properly stop internal
operation and complete any writes of critical data to BBRAM, EEPROM, or Flash memory
data area (if those functions are in use).
Cautions:
‧ Abrupt removal or droop of main power while the system is running has risks ranging from
fatal corruption of flash memory code area with BGA parts to minor impact on TTFF from lost
data.
‧ Complete removal of 1.8V even after orderly shutdown, will have performance
consequences
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7 Recommend layout PAD:
Dimension：13mm*15mm*2.2mm(Tolerance：±0.2mm)
TOP View
Recommend paste mask pad
Recommend paste mask pad is shift outside the layout pad 0.2mm (See under figure)
Black Block is layout PAD、Blue Block(Gray region is paste mask pad recommend)
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TOP View
8 Mechanical diagram
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9 Interface document
Top View
Pin defined:
Pin
No.
1
Input/
Name
Description
Characteristics
Output
NC
NC
Non connect
Non connect
2
Vol Max：0.4v
Voh Min：1.35v
TM Time mark output.
Output pulse timing.
3
4
5
PPS
TX
Output
Output
Input
(CMOS I/O run from 1.8v)
Vol Max：0.4v
Voh Min：1.35v
UART data transmit.
UART data receive.
(CMOS I/O run from 1.8v)
Vil ：-0.4v~0.45v
Vih ：1.26v~3.6v
RX
(CMOS I/O run from 1.8v)
6
7
8
GPIO-3
EI2/GPIO-8
GND
Reserved
Reserved
Reserved.
Reserved.
Ground
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Vil ：-0.4v~0.45v
Vih ：1.26v~1.8v
External reset input with
internal pull-up, active
low.
9
nRESET
ON/OFF
Input
Input
(CMOS I/O run from 1.8v)
Vil ：-0.4v~0.45v
Power control pin.
Need a pulse to ON or
OFF the Chip set.
Non connect
Vih ：1.26v~3.6v
10
(CMOS I/O run from 1.8v)
11
12
NC
Single voltage supply of
1.8v.
VCC_IN_1V8
Input
Max. 1.89v
13
14
15
DR_I2C_DIO Reserved
DR_I2C_SCK Reserved
Reserved.
Reserved.
GPIO-2
Reserved
Reserved.
Vil ：-0.4v~0.45v
Vih ：1.26v~1.8v
16
17
BOOT
Input
Boot select.
(CMOS I/O run from 1.8v)
Vol Max：0.4v
Indicate the state of the
chip set.
Voh Min：1.35v
Wakeup
Output
Input
(CMOS I/O run from 1.8v)
18
19
20
21
22
GND
GPS_RF_IN
GND
Ground
GPS Signal input.
Ground
GND
Ground
GND
Ground
VCC_IN_1V8 (Power Input)
This is the DC power supply input pin for GPS system. It provides voltage to
module.
Shutdown
Shutdown the REB-4315 module, don’t remove the Vcc_IN_1V8 Pin, You should use
on/off pulse make the chip into Hibernate mode.(It’s will keep the receiver’s SRAM
data integrity)
GND provides the reference ground.
Boot(CMOS I/O run from 1.8v)
Set this pin to high for programming flash.
Normal operation mode it is set to low voltage.
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RX(CMOS I/O run from 1.8v)
UART data receive (RX)
TX (CMOS I/O run from 1.8v)
UART data transmit (TX)
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).
ON_OFF (CMOS I/O run from 1.8v)
Input pulse is required to start the system, and switch the operation mode to full-power
mode or Hibernate mode.
Wakeup(CMOS I/O run from 1.8v)
Wakeup output indicate the chip states, when chip is working the output is high level.
Wakeup output can control or enable the external regulator.(Ex. To control
external antenna power)
PPS(CMOS I/O run from 1.8v)
This pin provides one pulse-per-second output from the board, which is synchronized to
GPS time.
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10. 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
GGA
Description
Global positioning system fixed data
GNSS DOP and active satellites
GNSS satellites in view
GSA
GSV
RMC
Recommended minimum specific GNSS data
Geographic position – latitude/longitude
Course over ground and ground speed
GLL
VTG
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
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
meters
second
Geoid Separation
Units
M
Null fields when DGPS is not
used
Age of Diff. Corr.
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Diff. Ref. Station ID
Checksum
0000
*18
＜CR＞＜LF＞
End of message termination
Table 3 Position Fix Indicators
Description
Value
0
1
Fix not available or invalid
GPS SPS Mode, fix valid
Differential GPS, SPS Mode, fix valid
Not Supported
2
3-5
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
Message ID
Mode 1
Example Units
Description
GSA protocol header
$GPGSA
A
3
See Table 5
Mode 2
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
1.0
1.5
*33
Position Dilution of Precision
Horizontal Dilution of Precision
Vertical Dilution of Precision
HDOP
VDOP
Checksum
＜CR＞＜LF＞
End of message termination
Table 5 Mode 1
Description
Value
M
A
Manual-forced to operate in 2D or 3D mode
Automatic-allowed to automatically switch 2D/3D
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Table 6 Mode 2
Description
Fix not available
Value
1
2
3
2D
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
Message ID
Total Number of
Messages1
Messages
Example Units
Description
GSV protocol header
$GPGSV
2
Range 1 to 3
1
Range 1 to 3
Number1
Satellites in View
Satellite ID
Elevation
07
07
Channel 1(Range 1 to 32)
79
048
42
degrees Channel 1(Range 00 to 90)
degrees Channel 1(True, Range 000 to 359)
dBHz Channel 1(Range 0 to 99, null when
not tracking)
Azimuth
SNR (C/No)
Satellite ID
Elevation
Azimuth
27
27
Channel 4(Range 01 to 32)
degrees Channel 4(Range 00 to 90)
degrees Channel 4(True, Range 000 to 359)
dB-Hz Channel 4(Range 00 to 99, null when
not tracking)
138
42
SNR (C/No)
Checksum
*71
＜CR＞＜LF＞
End of message termination
1Depending on the number of satellites tracked multiple messages of GSV data may be
required.
RMC-Recommended Minimum Specific GNSS Data
Table 8 contains the values of the following example:
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$GPRMC, 161229.487, A, 3723.2475, N, 12158.3416, W, 0.13, 309.62, 120598, ,*10
Table 8 RMC Data Format
Name
Message ID
UTC Time
Example
Units
Description
RMC protocol header
hhmmss.sss
$GPRMC
161229.487
A
Status
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
True
0.13
knots
309.62
degrees
Date
120598
ddmmyy
Magnetic Variation
Variation sense
Mode
degrees
E=east or W=west (Not shown)
A=Autonomous, D=DGPS, E=DR
A
Checksum
<CR><LF>
*10
End of message termination
VTG-Course Over Ground and Ground Speed
Table 9 contains the values of the following example:
$GPVTG,79.65,T,,M,2.69,N,5.0,K,A*38
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Table 9 VTG Data Format
Example Units
Name
Message ID
Course over rgound
Reference
Description
VTG protocol header
$GPVTG
79.65
T
degrees Measured heading
True
Course over ground
Reference
Speed over ground
Units
degrees Measured heading
Magnetic
M
2.69
N
Knots
Measured speed
Knots
Speed over ground
Units
Mode
5.0
K
A
Km/hr
Measured speed
Kilometer per hour
A-autonomous, D=DGPS, E=DR
Checksum
*38
<CR><LF>
End of message termination
GLL-Geographic Position – Latitude/Longitude
Table 10 contains the values of the following example:
$GPGLL,2503.6319,N,12136.0099,E,053740.000,A,A*52
Table 10 GLL Data Format
Name
Message ID
Latitude
Example
$GPGLL
2503.6319
Units
Description
GLL protocol header
ddmm.mmmm
N/S indicator
Longitude
E/W indicator
UTC Time
Status
N
N=north or S=south
Dddmm.mmmm
E=east or W=west
hhmmss.sss
A=data valid or V=data not valid
A=autonomous, D=DGPS, E=DR
12136.0099
E
053740.000
A
A
Mode
Checksum
<CR><LF>
*52
End of message termination
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11. Package Specification and Order Information
Shipment Method: Tape and reel
SMT type with stamp holes (22 holes)
12 Contact Royaltek
Contact: [email protected]
Headquarter:
Address：4F., No.188, Wen Hwa 2nd Rd., Kuei Shan, Tao Yuan 333, Taiwan
TEL: 886-3-3960001
FAX: 886-3-3960065
Revision History
Title
REB-4315 GPS Module
Doc Type User Manual
Revision
Number
Date
Author
Change notice
Initial Release
Modified Power
0.1
0.2
2010/08/20
2010/9/23
May Chen
May Chen
Copyright © 2010, RoyalTek Company Ltd.
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