RoyalTek RET-3570LP User manual

RET-3570LP User Manual
RET-3570LP User Manual
Version 1.1
2007/07/09
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
http://www.royaltek.com/contact
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RET-3570LP User Manual
Content
1. INTRODUCTION................................................................................................................ 1
1.1 PRODUCT FEATURES ......................................................................................................... 1
1.2 PRODUCT APPLICATIONS ................................................................................................... 1
1.3 PRODUCT PICTURES AND INTERFACE BOARD .................................................................... 2
1.4 SYSTEM BLOCK DIAGRAM ................................................................................................ 4
1.5 TECHNICAL SPECIFICATION ............................................................................................... 5
1.6 APPLICATION CIRCUIT ....................................................................................................... 6
1.7 RECOMMENDED LAYOUT PAD .......................................................................................... 8
1.8 MECHANICAL LAYOUT ...................................................................................................... 9
1.9 TEST SOFTWARE SPECIFICATION ........................................................................................ 9
1.10 HARDWARE INTERFACE ................................................................................................. 10
2. SOFTWARE INTERFACE ............................................................................................... 14
3. GPS RECEIVER USER’S TIP ......................................................................................... 18
4. PACKAGE SPECIFICATION AND ORDER INFORMATION .................................. 19
5. CONTACT ROYALTEK ................................................................................................... 19
6. REVISION HISTORY....................................................................................................... 19
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1. Introduction
RoyalTek RET-3570LP small form factor board is the newest generation of RoyalTek
GPS plus TMC module. TMC can deliver real-time traffic and travel information to
drivers. The driver can be notified of problems on the planned route, at the same time,
TMC calculates and provide an alternative route to help driver avoid the incident. The
combo module is powered by latest SiRF Star III 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, and speed
camera detector and vehicle locator.
1.1 Product Features
20 parallel channels
TMC embedded
TMC frequency 87.5MHz--108MHz
SMT type with stamp holes
TCXO design
0.1 second reacquisition time
Small form factor with embedded SiRF Star III single chip technology.
NMEA-0183 compliant protocol/ Royaltek TMC 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
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1.3 Product Pictures and Interface board
(1) RET-3570LP
Pin 1
(2) RET-3570LP Interface board
The interface board pin definition
J2 CONNECTOR
Pin #
1
2
3
Signal Name I/O Description
N.C
N.C
Backup voltage supply
Battery
I
Characteristics
DC + 2.5 ~ +3.6V
Current ≤ 10uA
4
VCC
I
5
Reset
I
DC Supply Voltage input DC +3.3V±10%
VIH > 2.3V ; V IL < 0.8V
Reset (Active low)
6-10 N.C
11
TXA
O
Serial port A
12
RXA
I
Serial port A
13
14
N.C
TXB
O
Serial port B
2.375V ≤ VOH ≤ 2.85V
CMOS TTL level
1.995V ≤ V IH ≤ 3.15V
CMOS TTL Level
2.375V ≤ VOH ≤ 2.85V
CMOS TTL level
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VOL ≤ 0.715V
- 0.3V ≤ V IL ≤ 0.855V
VOL ≤ 0.715V
RET-3570LP User Manual
I
Serial port B
1.995V ≤ V IH ≤ 3.15V
CMOS TTL Level
- 0.3V ≤ V IL ≤ 0.855V
Boot
I
Boot mode
1.995V ≤ V IH ≤ 3.15V
- 0.3V ≤ V IL ≤ 0.855V
18
GND
G
Ground
19
N.C
20
N.C
15
RXB
16
N.C
17
Switch U4
Pin # Signal Name 0/1 Description
1
GPIO-0
GPIO input/output
2
GPIO-4
3
4
GPIO-15
(N.C for
RET-3570)
PPS
5
GPS_3V3
6
TMC_3V3
7
8
N.C
RF_Bias
Characteristics
Switch:
0: Low 1:High CMOS TTL Level
GPIO input/output
Switch:
0: Low 1:High CMOS TTL Level
GPIO input/output
Switch:
(N.C for RET-3570) 0: Low 1:High CMOS TTL Level
(N.C for RET-3570)
PPS output
Switch:
0: Low 1:PPS output
Power supply for
Switch:
GPS section
0: Low 1: DC 3.3V output
Power supply for
Switch:
TMC section
0: Low 1: DC 3.3V output
RF_Bias voltage
switch
0: open. No voltage provide antenna.
1:Provide 2.85V to antenna.
Connector:
Pin # Description
Characteristics
J1
GPS RF Connector
1575.42MHz
J5
FM RF Connector
J4
Stereo Jack
87.5MHz~108MHz
Audio output
(Right and Left channel)
RoyalTek Evaluation Kit REV-2000 for RET-3570 LP
(Please refer to RoyalTek Evaluation Kit REV-2000 for RET-3570 Operational Manual for more
information.)
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1.4 System Block Diagram
System block diagram description:
(1) External antenna.
(2) 4 Mega bits flash memory
(3) 31 pin I/O pin
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1.5 Technical Specification
Impedance:50Ω
No
GPS receiver
1
Chipset
Function
Specification
SiRF Star III, GSC3f/LP
(Digital, RF in a single package)
2
Frequency
L1 1575.42MHz.
3
Code
C.A. Code.
4
Channels
20 parallel
5
Chipset Sensitivity
-159dBm.
6
Chipset Cold start @open sky 35 sec
7
Chipset Warm start @open 35 sec
sky
8
Chipset Hot start @open sky 1 sec
9
Reacquisition
0.1sec typical
10 Position accuracy
10meters at 2D RMS.
11 Maximum altitude
18000 m
12 Maximum velocity
514 m/s
13 Trickle power mode
Duty cycle ≦ 34%. (Variable)
14 Update rate
Continuous operation: 1Hz
15 Testability
It shall be able to be tested by SiRF test IV and single channel
simulator.
16 Protocol setup
It shall store the protocol setup in the SRAM memory.
17 DGPS
WAAS, EGNOS
Interface
18 LNA
No LNA
19 I/O Pin
31pin
TMC/RDS receiver
20 Frequency
87.5~108MHz. US/Europe
24.7uV
typical
21 RDS sensitivity
Δf=22.5kHz, fAF = 1kHz,L=R, fRDS=1.2kHz,
De-emphasis= 50us,
Block Quality Rate ≧85%
22
Right and Left audio output
Conditions:
voltage
V RF = 1mV ; L = R ; ∆f = 22.5KHz ; f mod = 1KHz ; No
pre-emphasis; TC deem = 75us
Output voltage:
Min= 55 mV
Typ=66 mV
Max=75mV
Mechanical requirements
23 Weight
Power consumption
24 Vcc
25 Current
≦3.5g
DC 3.3 ±5%
GPS:
Fix mode Current 36mA average.
RDS Current: 15mA typical
Environment
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Operating temperature
Humidity
-40 ~ 85℃
≦95%
1.6 Application Circuit
Reference:
Note:
(1) Ground Planes:
RET3570LP GPS receiver needs two different ground planes.
These pins(13、15、16、18) should be connected to analog ground.
These pins(2、10、30) should be connected to digital ground.
(2) Serial Interface:
(I)The TXA pin is recommended to pull up (10KΩ). It can increase the stability of
serial data.
(II) The TXB pin is recommended to connect to serial resistance(220Ω) and pull
up (10KΩ), if use the DGPS output.
If the DGPS output is not used, it won’t connect anything.
(III) The RXB pin is recommended to connect to serial resistance(220Ω), if the DGPS
output is used.
If the DGPS output is not used, it won’t connect anything.
(3) 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 float it.
If you use a backup battery, you should add a bypassing capacitor (10uF) at V_RTC_3V3
pin to reduce noise and increase the stability.
(4) GPS_RF_IN:
Connecting to the antenna has to be routed on the PCB. The transmission line must control
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impedance to connect RF_IN to the antenna or any antenna connectors that you prefer.
(Impedance 50Ω)
(5) FM_RF_IN:
Connecting to the antenna has to be routed on the PCB. The transmission line must control
impedance to connect FM_RF_IN to the antenna or any antenna connectors that you prefer.
(Impedance 50Ω)
(6) Power:
Connect V_GPS_3V3 and V_TMC_3V3 pin to DC 3.3V. The power supply must add a
bypassing capacitor (10uF and 1uF) to reduce the noise from power supply and increase
power stability.
(7) Active antenna bias voltage:
The Vcc_RF_OUT pin (pin 20) provides voltage 2.85V. If you use an active antenna, you
can connect this pin to V_ANT_IN pin (pin 19) for providing bias voltage of an active
antenna. The bias voltage will run through GPS_RF_IN pin to provide active antenna bias
voltage from Vcc_RF_OUT pin.
If your bias voltage of an active antenna isn’t 2.85V, you can input bias voltage that you
need to V_ANT_IN pin (pin 19). The input bias voltage will run through GPS_RF_IN pin
to provide active antenna bias voltage from V_ANT_IN pin.
PS:
(Ⅰ). The maximum power consumption of active antenna is around 85mW.
(Ⅱ). The input gain ranges from 12 to 26dB.
(8) GPIO:
The GPIO pin is recommended to connect to serial resistance(220Ω), if the GPIO function
is used.
If GPIO function is not used, it won’t connect anything.
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1.7 Recommended layout PAD
Top View
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1.8 Mechanical Layout
Unit: mm
P17
P16
P31
P1
1.9 Test Software Specification
No
1
2
3
4
5
6
7
Function
Clock offset
Clock Drift
C/No Hi Power Mean
C/No Hi Power Sigma
Bit Sync
Frame Sync
Phase Error
Specification
88000Hz≦Measurement≦104000Hz
Measurement≦200Hz
Measurement≧38dB
Measurement≦2dB
Measurement≦5 Sec
Measurement≦28 Sec
Measurement≦0.22°
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1.10 Hardware interface
Interface Pin Number:
Pin # Signal Name
I/O Description
Characteristics
1
V_GPS_3V3
I
DC Supply Voltage input
DC +3.3V±5%
2
GND
G
Ground
Reference Ground
3
BOOT
I
Boot mode
1.995V ≤ V IH ≤ 3.15V
- 0.3V ≤ V IL ≤ 0.855V
4
RXA
I
Serial port A
1.995V ≤ V IH ≤ 3.15V
- 0.3V ≤ V IL ≤ 0.855V
5
TXA
O
Serial port A
2.375V ≤ VOH ≤ 2.85V
VOL ≤ 0.715V
6
TXB
O
Serial port B
2.375V ≤ VOH ≤ 2.85V
VOL ≤ 0.715V
7
RXB
I
Serial port B
1.995 ≤ V IH ≤ 3.15V
8
N.C
9
RF_ON
O
10
GND
G
Indicates power state of RF VOH = 2.85V ; VOL = 0V
part
Ground
Reference Ground
11
AUDIO_R
O
Audio right channel output V AFL Output voltage 66mV(typical) ~75mV(max)
- 0.3V ≤ V IL ≤ 0.855V
R AFL Output resistance 50Ω(min) ~ 100Ω
12
AUDIO_L
O
Audio Left channel output V AFL Output voltage 66mV(typical) ~75mV(max)
R AFL Output resistance 50Ω(min) ~ 100Ω
13
GND
14
FM_RF_IN
G
I
Ground
FM antenna input
Reference Ground
FM antenna input
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(Input impedance 50Ω; Frequency 87.5~108MHz)
15
GND
G
Ground
Reference Ground
16
GND
G
Ground
Reference Ground
17
GPS_RF_IN
I
GPS Signal input
50 Ω @1.57542GHz
18
GND
G
Reference Ground
19
V_ANT_IN
I
20
VCC_RF_OUT O
Ground
Active Antenna Bias
voltage
Supply Antenna Bias
voltage
Current<30mA
Receiving DC power supply for active antenna bias.
VO = 2.85V ± 5%
21
V_RTC_3V3
I
Backup voltage supply
DC + 2.5 ~ +3.6V
Current ≤ 10uA
22
RESET
I
Reset (Active low)
VIH > 2.3V
23
N.C
24
N.C
25
GPIO4
; V IL < 0.8V
1.995V ≤ V IH ≤ 3.15V
I/O General purpose I/O
2.375V ≤ VOH ≤ 2.85V
26
GPIO0
1.995V ≤ V IH ≤ 3.15V
I/O General purpose I/O
2.375V ≤ VOH ≤ 2.85V
27
N.C
28
N.C
29
PPS
O
One pulse per second
2.375V ≤ VOH ≤ 2.85V
30
GND
G
Ground
Reference Ground
31
V_TMC_3V3
I
DC Supply Voltage input
DC +3.3V±5%
- 0.3V ≤ V IL ≤ 0.855V
VOL ≤ 0.715V
- 0.3V ≤ V IL ≤ 0.855V
VOL ≤ 0.715V
VOL ≤ 0.715V
V_GPS_3V3 (+3.3V DC power Input)
This is the DC power supply input pin for GPS system. It provides voltage for module.
GND
GND provides the ground.
BOOT
Set this pin to high for programming flash.
RXA
This is the main receiver channel. The main function is to receive software commands from
SIRFdemo software or other user’s application.
RXB
This is the auxiliary receiving channel. The main function is to input differential corrections,
then deliver them to the board for DGPS navigation.
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TXA
This is the main transmitting channel and is used to output navigation and measurement data
to SiRFdemo or from user’s application.
TXB
For user’s application.(Not current use).
RF_ON
This pin indicates the status of RF voltage.
V_TMC_3V3 (+3.3V DC power Input)
This is the DC power supply input pin for TMC function. It provides voltage for TMC section
of the module.
AUDIO_R
This pin is the function of audio right channel output.
AUDIO_L
This pin is the function of audio left channel output.
FM_RF_IN
This pin can receive FM analog signal. The trace on the PCB from the antenna(or antenna
connector) has to be
controlled impedance line (Micro strip at 50Ω).
GPS_RF_IN
This pin can receive GPS analog signal. The trace on the PCB between the antenna(or antenna
connector) has to be a controlled impedance line (Micro strip at 50Ω).
V_ANT_IN
This pin is reserved as external DC power supply input for an active antenna.
If using 2.85V active antenna, the 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 external power supply is used.
VCC_RF_OUT
This pin can provide power 30mA@2.85V for an active antenna.
RESET
This pin provides an active-low reset input for the board. It causes that the board resets and
starts to search for satellites. If RESET pin is not used, it won’t connect anything.
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 the main power is
removed. Typical current draw is 10uA.
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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. Software Interface
NMEA V3.0 Protocol
Its output signal level is TTL: 38400 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 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
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
$GPGGA
Description
GGA protocol header
UTC Position
161229.487
hhmmss.sss
Latitude
3723.2475
ddmm.mmmm
N/S Indicator
Longitude
N
N=north or S=south
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
Units
M
meters
Geoid Separation
Units
meters
M
meters
second Null fields when DGPS is not
used
Age of Diff. Corr.
Diff. Ref. Station ID
0000
Checksum
*18
End of message termination
<CR><LF>
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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
6
Not Supported GPS PPS Mode, fix valid
Dead Reckoning Mode, fix valid
GSA-GNSS DOP and Active Satellites
Table 2-4 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
Message ID
$GPGSA
Units
Description
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
End of message termination
<CR><LF>
Table 5 Mode 1
Value
Description
1
Fix not available
2
2D
3
3D
Table 6 Mode 2
Value
Description
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M
Manual-forced to operate in 2D or 3D mode
A
Automatic-allowed to automatically switch 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 GGA Data Format
Name
Example
Units
Description
Message ID
$GPGSV
GSV protocol header
Number of
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(Maximum 90)
Azimuth
048
degrees Channel 1(True, Range 0 to 359)
SNR (C/No)
42
Messages1
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
Checksum
*71
dBHz
Range 0 to 99, null when not tracking
End of message termination
<CR><LF>
1
Depending 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 GGA Data Format
Name
Message ID
UTC Position
Status
Example
Units
$GPRMC
Description
RMC protocol header
161229.487
hhmmss.sss
A
A=data valid or V=data not valid
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Latitude
N/S Indicator
Longitude
E/W Indicator
3723.2475
N
dddmm.mmmm
W
0.13
Course Over Ground
309.62
Date
120598
Magnetic Variation
Checksum
N=north or S=south
12158.3416
Speed Over Ground
Mode
ddmm.mmmm
E=east or W=west
knots
degrees
True
ddmmyy
degrees
A
E=east or W=west
A=Autonomous, D=DGPS, E=DR
*10
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3. GPS Receiver User’s Tip
A.
GPS signal will be affected by weather and environment conditions, so it is recommended to use
the GPS receiver under less shielding environments to ensure GPS receiver has better receiving
performance.
B.
When GPS receiver is moving, it will prolong the time to fix the position, so it is recommended
to wait for the satellite signals locked at a fixed point when first power-on the GPS receiver to
ensure to lock the GPS signal at the shortest time.
C.
The following situation will affect the GPS receiving performance:
i.
Solar control filmed windows.
ii.
Metal shielded, such as umbrella, or in vehicle.
iii.
Among high buildings.
iv.
Under bridges or tunnels.
v.
Under high voltage cables or near by radio wave sources, such as mobile phone base
stations.
vi.
D.
Bad or heavy cloudy weather.
If the satellite signals can not be locked or encounter receiving problem (while in the urban area),
the following steps are suggested:
i.
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.
ii.
Move to another open space or reposition GPS receiver toward the direction with less
blockage.
E.
iii.
Move the GPS receiver away from the interferences resources.
iv.
Wait until the weather condition is improved.
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.
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4. Package Specification and Order Information
Shipment Method: Tape and reel
5. Contact Royaltek
Contact: sales@royaltek.com
Headquarter:
Address: 8F, 256 Yang Guang Street, Neihu Chiu, Taipei, Taiwan
Tel: 886-2-77215000
Fax: 886-277215666
Web Site: http://www.royaltek.com
Web Site Customer Service:
http://www.royaltek.com/contact
6. Revision History
Title
RET-3570LP
Doc Type
Revision
Number
0.1
0.2
1.0
1.1
User Manual
Date
Author
20076/03/26
2007/03/28
2007/03/29
2007/07/09
May Chen
May Chen
May Chen
May Chen
Change notice
Initial Release
Remove RTCM Protocol
Final Release
Modify the chipset TTFF @open sky
Copyright © 2005-2006, RoyalTek Company Ltd.
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