1 .Introduction
The NEWSTAR BU-1316 module is a high sensitivity, low power and very compact Surface
Mount Device (SMD), and it supports signal processing of L1 band signals such as GPS C/A and
SBAS (including WAAS, EGNOS, and MSAS). This 56-channel global positioning system (GPS)
receiver is designed for a broad spectrum of OEM applications and is based on the fast and
deep GPS signal search capabilities. NEWSTAR BU1316 is designed to allow
quick and easy integration into GPS-related applications, especially for compact size
devices, such as:
PDA, Pocket PC and other computing devices
Fleet Management / Asset Tracking
AVL and Location-Based Services
Hand-held Device for Personal Positioning and Navigation
1.1 Features
Hardware and Software
56 acquisition channels and achieve -162dBm tracking
Compact module size for easy integration: 16.0x13.0x2.5 mm.
SMT pads allow for fully automatic assembly processes equipment and reflow soldering
Built-in LDO, regulators to decrease extra-BOM cost
Up to 10Hz update rate
Embedded DC/DC circuitry to prolong battery life
AGPS supported
Performance
Cold/Warm/Hot Start Time: 30 / 29 / 1 sec.
RF Metal Shield for best performance in noisy environments
Enhanced Navigation Performance
Interface
TTL level UART interface
Protocol: NMEA
Baud Rate: 9600 bps(Default)
Advantages
Ideal for compact size devices
Data / Power / RF through surface mount pads
Flexible and cost effective hardware design for different application requirements
Secure SMD PCB mounting method
2. Pin Assignment
12
13
14
15
16
17
18
36
35
34
33
32
31
30
Pin Numbers Name Type Description Note
1 RF_IN I GPS Antenna Input
2,3,4,6,8,9,10,
12,14,15,17,1
9,21,22,23,24,
28,29,33,35,3
6
GND P Ground
5 VBAT P Backup battery supply voltage
7 SAFEBOOT_N I Safe boot input. Low asserted.
Note: DO NOT tie to GND in
normal mode
11 VCC_MAIN P Main power supply voltage
13,18,20,25,2
7,32,34
NC NC
16 GPO/ANT_OFF O general purpose output. NC if not
used
30 UART TXD O TTL UART output,0~3.3V
31 UART RXD I TTL UART input
3 .Electrical Specification
3.1 Absolute maximum ratings
Parameter Symbol Min Max Unit
Power Supply Voltage VCC_MAIN -0.5 3.6 V
Backup Supply Voltage VBAT -0.5 3.6 V
3.2 Operation Conditions
Parameter Symbol Min Typ Max Unit
Main Power Supply
Power Supply Voltage VCC_MAIN 1.8 3.3 3.6 V
Operating Current 35 38 45 mA
Backup Power Supply
Backup Supply Voltage VBAT 1.6 3.3 3.6 V
Operating Current(Working) 185 uA
Operating Current(Sleep) 15 uA
UART and IO
Input Low Voltage Vil 0 0.72 V
Input High Voltage Vih 2.0 3.6 V
Output Low Voltage Vol 0.4 V
Output High Voltage Voh 2.4 V
3.3 Environmental Specification
Item Description
Operating temperature rang -40 deg. C to +85 deg. C
Operating temperature rang -40 deg. C to +85 deg. C
Altitude 50,000 m
Velocity 500 m/s
Jerk
4. Reference Design
Note:
1.Trace impedance between Antenna and Pin1 should be 50 ohm.
M3
RF_IN
1
GND
2
GND
3
GND
4
VBAT
5
GND
6
SAFEBOOT_N
7
GND
8
GND
9
GND
10
VCC_MAIN
11
GND
19
NC
20
GND
21
GND
22
GND
23
GND
24
NC
25
GND
26
NC
27
GND
28
GND
29
GND
12
NC
13
GND
14
GND
15
GPIO/ANT_OFF
16
GND
17
NC
18
UART_TX
30
UART_RX
31
NC
32
GND
33
NC
34
GND
35
GND
36
E3
GPS_ANT
VCC_Main_Power(3.3V)
D3 C8
1uF
BT3 R3
0 ohm
C9
1uF
50 ohm trace impedance
UART_TX
UART_RX
Host UART
Interface
5 .Performance Characteristics
Position and Velocity Accuracy
Accuracy Position 2.5m in autonomous
2.0m in SBAS
Velocity 0.1 m/s
Dynamic constrains
Dynamic Conditions Altitude 50,000m
Velocity 500 m/s
Acceleration <= 4g
Acquisition time TTFF
Mode B1315U GPS Module
Hot Start 1s
Warm Start 28s
Cold Start 29s
Sensitivity
Parameter Description
Tracking & Navigation -162 dBm
Acquisition -148 dBm
6. PCB Layout Recommend
Recommended Layout Pad
PCB Layout Recommendations
Do not routing the other signal or power trace under the module board.
RF:
This pin receives signal of GPS analog via external active antenna. Note: It has to be a
controlled impedance trace at 50ohm.
Do not place the RF traces close to the other signal path and not routing it on the top layer.
Keep the RF traces as short as possible.
Antenna:
Keep the active antenna on the top of your system and confirm the antenna radiation pattern、
axial ratio、power gain、noise figure、VSWR are correct when you Setup the antenna in your case.
7. Configuration Management
Configuration settings can be modified with configuration messages. The modified settings remain
effective until power-down or reset. If these settings have been stored in battery-backup RAM,
then the modified configuration will be retained, as long as the backup battery supply is not
interrupted.
Note that: If any new configuration needs to be done, pls refer to module Receiver Description
Including Protocol Specification.
8 Software Interface
The output NMEA (0183 v3.01) messages for the receiver are listed as below.
NMEA Command Description
GGA Time, position, and fix related data for a GPS receiver.
GLL Latitude and longitude of present position, time of position fix and
status
GSA GPS receiver operating mode, satellites used in the position
solution, and DOP values.
GSV The number of GPS satellites in view satellite ID numbers,
elevation, azimuth, and SNR values.
RMC Time, date, position, course and speed data provided by the GPS
receiver.
GGA - Global Positioning System Fixed Data
For example:
$GPGGA,161229.487,3723.24751,N,12158.34162,W,1,07,1.0,9.0,M,-34.2,M,,0000*18
Table 1
Name Example Description Unit
Message ID $GPGGA GGA protocol header
UTC Time 161229.487 hhmmss.sss
Latitude 3723.24751 ddmm.mmmmm
N/S Indicator N N=north or S=south
Longitude 12158.34162 dddmm.mmmmm
E/W Indicator W E=east or W=west
Position Fix Indicator 1 See Table 1-1
Satellites Used 07 Range 0 to 12
HDOP 1.0 Horizontal Dilution of Precision
MSL Altitude 9.0 meters
Units M meters
Geoid Separation -34.2 Geoid-to-ellipsoid separation.
Ellipsoid altitude=MSL Altitude + Geoid
Separation
meters
Units M meters
Age of Diff. Corr. Null fields when DGPS is not used second
Diff. Ref. Station ID 0000
Checksum *18
<CR><LF> End of message termination
Table 1-1
Value Description
0 Fix not available or invalid
1 GPS SPS Mode, fix valid
2 Differential GPS, SPS Mode , fix valid
3 Not supported
6 Dead Reckoning Mode, fix valid
GLL - Geographic Position-Latitude/Longitude
For example:
$GPGLL,3723.24755,N,12158.34166,W,161229.487,A,A*41
Table2
Name Example Description Unit
Message ID $GPGLL GLL protocol header
Latitude 3723.24755 ddmm.mmmmm
N/S Indicator N N=north or S=south
Longitude 12158.34166 dddmm.mmmmm
E/W Indicator W E=east or W=west
UTC Position 161229.487 hhmmss.sss
Status A A=data valid or V=data not valid
Mode A A=Autonomous, D=DGPS,
E=DR
N=Output Data Not Valid
R= Coarse Position1
S=Simulator
Checksum *41
<CR><LF> End of message termination
1.Position was calculated based on one or more of the SVs having their states derived