RoyalTek REB-4315 Quick start guide

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: [phone]
FAX: [phone]
contact sales: http://www.royaltek.com/contact

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Content
1. Introduction...........................................................................................................2
1.1 Product Applications.....................................................................................2
2. Product Pictures ...................................................................................................3
3. REB-4315 Block Diagram.....................................................................................3
4. REB-4315 Technical Specification.........................................................................4
5. Reference schematic:...........................................................................................5
6. Power Design Consideration ................................................................................6
7. Recommend layout PAD:......................................................................................7
8. Mechanical diagram .............................................................................................8
9. Interface document...............................................................................................9
10. Software Interface................................................................................................12
11. Package Specification and Order Information ......................................................16
12. Contact Royaltek..................................................................................................17
Revision History .........................................................................................................17

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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
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
Automotive navigation
Personal positioning and navigation
Mobile gaming
Cameras
Asset Tracking
Others location-aware consumer devices

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2 Product Pictures
3 REB-4315 Block Diagram
System block diagram description:
a. External antenna.
b. 16 Mega bits flash memory
c. 22 pin I/O pins
Pin 1

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4 REB-4315 Technical Specification
Impedance：50Ω
No Function Specification
GPS receiver
1 Chipset SiRF Star IV, GSD4e
2 Frequency L1 1575.42MHz.
3 Code C.A. Code.
4 Channels 48 track verification channels
5 Sensitivity (Acquisition) It shall show C/No ≧40 dB-Hz when external power
= -130dBm.
6 Cold start 35 sec (50% -130dBm Fu 0.5 ppm Tu ±2s Pu 30km)
7 Warm start 35 sec (50% -130dBm Fu 0.5 ppm Tu ±2s Pu 30km)
8 Hot start 1 sec (50% -130dBm Fu 0.5 ppm Tu ±2s Pu 30km)
9 Reacquisition 0.1sec typical
10 Position accuracy 2.5meters(50% 24hr static, -130dBm)
11 Maximum altitude 18288 m
12 Maximum velocity 514 m/s
13 Update rate 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 :
Typ.52mA@1.8V(Avg Acquisition w/o ext. Antenna)
Typ.41mA@1.8V(Avg Tracking w/o ext. Antenna)
18 Hibernate Mode T[email protected](Average w/o ext. Antenna)
Mechanical requirements
19 Dimension(mm) 13*15*2.2
20 Weight ≦3g
Environment
21 Operating temperature -30 ~ 85℃
22 Humidity ≦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. Name Input/
Output Description Characteristics
1 NC Non connect
2 NC Non connect
3 PPS Output
TM Time mark output.
Output pulse timing.
Vol Max：0.4v
Voh Min：1.35v
(CMOS I/O run from 1.8v)
4 TX Output UART data transmit.
Vol Max：0.4v
Voh Min：1.35v
(CMOS I/O run from 1.8v)
5 RX Input UART data receive.
Vil ：-0.4v~0.45v
Vih ：1.26v~3.6v
(CMOS I/O run from 1.8v)
6 GPIO-3 Reserved Reserved.
7 EI2/GPIO-8 Reserved Reserved.
8 GND Ground

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9 nRESET Input
External reset input with
internal pull-up, active
low.
Vil ：-0.4v~0.45v
Vih ：1.26v~1.8v
(CMOS I/O run from 1.8v)
10 ON/OFF Input
Power control pin.
Need a pulse to ON or
OFF the Chip set.
Vil ：-0.4v~0.45v
Vih ：1.26v~3.6v
(CMOS I/O run from 1.8v)
11 NC Non connect
12 VCC_IN_1V8 Input Single voltage supply of
1.8v. Max. 1.89v
13 DR_I2C_DIO Reserved Reserved.
14 DR_I2C_SCK Reserved Reserved.
15 GPIO-2 Reserved Reserved.
16 BOOT Input Boot select.
Vil ：-0.4v~0.45v
Vih ：1.26v~1.8v
(CMOS I/O run from 1.8v)
17 Wakeup Output
Indicate the state of the
chip set.
Vol Max：0.4v
Voh Min：1.35v
(CMOS I/O run from 1.8v)
18 GND Ground
19 GPS_RF_IN Input GPS Signal input.
20 GND Ground
21 GND Ground
22 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 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
Units M meters
Age of Diff. Corr. second Null fields when DGPS is not
used

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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
Table 5 Mode 1
Value Description
M Manual-forced to operate in 2D or 3D mode
A Automatic-allowed to automatically switch 2D/3D

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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 Example Units Description
Message ID $GPGSV 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)
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:

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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 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
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
Name Example Units Description
Message ID $GPVTG VTG protocol header
Course over rgound 79.65 degrees Measured heading
Reference T True
Course over ground degrees Measured heading
Reference M Magnetic
Speed over ground 2.69 Knots Measured speed
Units N Knots
Speed over ground 5.0 Km/hr Measured speed
Units K Kilometer per hour
Mode A 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 Example Units Description
Message ID $GPGLL GLL protocol header
Latitude 2503.6319 ddmm.mmmm
N/S indicator N N=north or S=south
Longitude 12136.0099 Dddmm.mmmm
E/W indicator E E=east or W=west
UTC Time 053740.000 hhmmss.sss
Status A A=data valid or V=data not valid
Mode A A=autonomous, D=DGPS, E=DR
Checksum *52
<CR><LF> 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: [phone]
FAX: [phone]
Web Site: http://www.royaltek.com
Web Site Customer Service: http://www.royaltek.com/contact
Revision History
Title REB-4315 GPS Module
Doc Type User Manual
Revision
Number Date Author Change notice
0.1 2010/08/20 May Chen
Initial Release
0.2 2010/9/23 May Chen
Modified Power
Copyright © 2010, RoyalTek Company Ltd.