Sony GXB5005 User manual

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Sony reserves the right to change products and specifications without prior notice. This information does not convey any license
by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating
the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
GXB5005
SMD Type GPS Receiver Module
Description
The GXB5005 is a 12-channel GPS (Global Positioning System) receiver module.
This small module includes all the functions required for GPS and is designed for using an active antenna.
The GXB5005 can support the various kinds of the portable applications as well as the car navigation system.
Features
General
Implementation of Sony CXD2951GA-4 single chip GPS
Small size with SMD type pads and shield case
Module size (typ.): 22.4 (W) ×23.5 (D) ×3.2 (H) [mm]
Current consumption: Acquisition (typ): 70 [mA]
Tracking (typ): 41 [mA]
Battery backup (typ): 7 [μA]
Datum: WGS-84
Communication method: Supports NMEA-0183 version 3.01
Internal 32.768kHz RTC
Internal 18.414MHz TCXO
Antenna input 50Ω
Recommended antenna element
An active antenna with 0dB and RF amplifier with NF ≤2dB, 8 to 30dB gain
Functionality
12-channel GPS receiver capable of simultaneously receiving 12 satellites
All-in-view measurement
Valid fix indication output
1PPS output
WAAS/EGNOS compatible
Supported baud rate: 4800bps/9600bps/19200bps/38400bps by HW setting
Internal power on reset circuit
Antenna sense (option)

GXB5005
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Performance
Tracking sensitivity: –152dBm (typ.)
Acquisition sensitivity: –139dBm (typ.)
Time to first fix (time until initial measurement after power-on) (typ., Open sky)
Cold start (without ephemeris and almanac): 40s
Warm start (without ephemeris with almanac): 33s
Hot start (with ephemeris and almanac): 2 to 3s
Positioning accuracy (Open air with ≥–130dBm, PDOP ≤2.0)
Stand alone (GPS unit only) 2DRMS: approx. 2m
Follow-up performance: Velocity: 500km/h or less
Acceleration: 1G or less
Absolute Maximum Ratings
Operating Conditions
Item Symbol Min. Max. Unit
Power supply voltage VDD –0.5 3.7 V
Input voltage VI–0.5 5.5 V
Output voltage VO–0.5 VDD + 0.5 V
Operating temperature Topr –40 +85 °C
Storage temperature Tstg –40 +105 °C
Item Symbol Min. Typ. Max. Unit
Power supply voltage VDD 3.1 3.4 3.7 V
Power supply voltage ripple VDD-rip 50 mVp-p
Backup battery voltage Vbat 2.6 2.8 3.0 V
Input pin voltage VIN –0.3 5.5 V
Supply current: Acquisition (25°C) ICC 70 mA
Supply current: Tracking (25°C) ICC 41 mA
Standby current Istdby 7 120 μA
Operating temperature Topr –40 +25 +85 °C
Reception frequency, L1 CA code FIN 1575.42 MHz

GXB5005
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Architecture
JTAG, GPIO, etc.
CXO
32.768kHz
Host I/O
Control signal
1 bit
LNALNA SAW
BPF
Freq.
Synthesizer
LPF
Down
Converter
1.023MHz
TCXO
CPU
18.414MHz
TCXO Multiplier/
Divider
CPU
CPU, Counter
DLL, D.MF, S/P
RTC
ARM7TDMI
Time
Counter
RAM/
ROM
1.8V
Regulator
Acquisition Block
TCXO
Computation & Control Block
CMOS Radio Block
CXD2951
Baseband Unit
RF/IF Unit
Tracking Block

GXB5005
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Pin Configuration
(Top View)
Pin Description
19. 1PPS
18. B.U.
17. VDD
16. RST
15. GND
14. GND
13. Status Out
12. RF GND
11. RF IN
10. RF GND
1. AD In0
2. AD In1
3. ANT Cont
4. BR1
5. BR0
6. RXD0
7. TXD0
8. WA1
9. WA0
23.5mm
22.4mm
TCXO
CXD2951
Regulator
RF
32kHz X'tal
LNA
Shield Case Land
Pin No. Symbol I/O Description
1 AD In0 I Antenna sense input 0
2 AD In1 I Antenna sense input 1
3 ANT Cont I/O Antenna sense enable (High active)
4 BR1 I Baud rate setting 1
5 BR0 I Baud rate setting 0
6 RXD0 I UART (CH0) reception data
7 TXD0 O UART (CH0) transmission data
8 WA1 I WAAS enable 1
9 WA0 I WAAS enable 0
10 RF GND RF GND
11 RF IN I GPS signal input
12 RF GND RF GND
13 Status Out Status output
14 GND GND
15 GND GND
16 RST I Hardware reset (Low active)
17 VDD Power supply 3.4V
18 B.U. Battery backup 2.8V
19 1PPS O 1PPS output

GXB5005
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Baud Rate Setting
WAAS Enable
*1 WAAS function is set by @WA command via UART when WA1 is Low.
Baud rate BR1 BR0
4800 Open (L) H
9600 Open (L) Open (L)
19200 H Open (L)
38400 H H
WAAS WA1 WA0
Command*1 Open (L) Don’t care
Disable H Open (L)
Enable H H

GXB5005
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Electrical Characteristics
DC Characteristics
(Ta = –40 to +85°C)
AC Characteristics
(Ta = 25°C)
*1 Using SONY evaluation software “GPS View”
Timing of Output Signal
Item Symbol Condition Min. Typ. Max. Unit Pins
Supply voltage VDD 3.1 3.4 3.7 V 17
Vbat 2.6 2.8 3.0 V 18
Supply voltage ripple VDD-rip 50 mVp-p 17, 18
Input
voltage
H level VIH 2.0 5.5 V 3, 4, 5, 6, 8,
9, 16
L level VIL –0.3 0.8 V
AD VAD 0(VDD – 0.1) V 1, 2
Output
voltage
H level VOH IOH = –8mA 2.4 V 3, 7, 19
L level VOL IOL = 2mA 0.4 V
Current consumption ICC (3.3V) Acquisition 70 mA 17
Tracking 41
Istdby Vbatt = 2.8V 7 120 μA18
Item Symbol Condition Min. Typ. Max. Unit
C/N output value CN –130dBm input,
Tracking, *1 42 dB
TCXO frequency Ftcxo Internal 18.414 MHz
Message latency Tl 1.0 s
RF gain Grf 114 dB
Noise figure NF 2 dB
Output signal rise time Ttlh Zload = 5kΩ,
20pF 25 55 ns
Output signal fall time Tthl Zload = 5kΩ,
20pF 30 60 ns
5kΩ
20pF
Pin 7
(TXD0) 90%
90%
10% 10%
Ttlh

GXB5005
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Initialization
The GXB5005 has a reset pin (Pin 16) and normally this pin should be left open. The GXB5005 can perform
the power-on reset operation only by turning on or off the power supply pin (Pin 17). In addition, when
configuring the component in order to realize the reset from the system side during operation, connect the reset
pin to the external circuit. The following setting enables the reset.
1. When turning the power on (Power-on reset)
When applying the power supply to the power supply pin (Pin 17), set the reset pin (Pin 16) Low in advance,
and set it High 100ms after power-on.
2. Initialization during operation
When performing the reset while the reset pin (Pin 16) is High, keep it Low for 100μs or more before setting
High.
VDD
VDD [V]
GND
16.RST
17.VDD
VDD/2
100ms or more
VDD
GND
VDD/2
100µs or more
VDD [V]
16.RST
17.VDD

GXB5005
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Status Out
“Status Out” signal turns over
1. Definition of internal status
Searching: Searching satellites after initialization
Tracking: Navigation message decoded at least one satellite
Positioning: Position fixing
2. “Status Out” status by each internal status
Reset: Input, pulled down internally
Initialization: Output Low
Searching: Output 1s High, 1s Low turn over
Tracking: Output 0.5s High, 0.5s Low turn over
Positioning: Output High (keeping)
3. Jitter
Turns over regular pulse width ±5% max.
|T – T1| / T ≤5%
4. Status transition
Check internal status every 0.5s, only the status changes, “Status Out” output logic turns over and keeps
specified High-Low output interval.
Only status changes to positioning, “Status Out” output turns over High caused by the previous status.
0.5s
0.5s
Tracking
L
H
1.0s
L
1.0s
Searching
H
Positioning
L
H
1234
T
H
T1
T
T1
LL
H
T: Regular pulse width (1s/0.5s)
T1: Actual pulse width
Searching Tracking Positioning
1.0s
Low
High
Status Out
Change state Change state
0.5s

GXB5005
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UART Interface
Interface: Asynchronous serial interface (UART)
Baud rate: 4800bps/9600bps/19200bps/38400bps
Start bit: 1 bit
Data bit: 8 bits
Stop bit: 1 bit
Parity bit: None
Flow control: Xon/Xoff
Data output cycle: Approximately 1 second (default)
NMEA0183 Format
The GXB5005 can output 8 different types of sentence: GPGGA, GPGLL, GPGSA, GPGSV, GPRMC, GPVTG,
GPZDA and PSGSA. If 9600bps, 19200bps or 38400bps baud rate is set for port setting, it outputs 7 types of
sentence: GPGGA, GPGSA, GPGSV, GPRMC, GPVTG, GPZDA and PSGSA as default. Moreover, if 4800bps
baud rate is set, it outputs 4 types of sentences: GPGGA, GPGSA, GPGSV and GPRMC as default.
NMEA Message Output Timing
NMEA messages are output within 1s after the 1PPS pulse.
1
0
D0 D1 D2 D3 D4 D5 D6 D7
Start bit
1 bit
Data bit
8 bits
Stop bit
1 bit
LSB MSB
t + 1 t + 2 t + 3 t + 4 t + 5 t + 6 T
1PPS
NMEA
t + 1 t + 2 t + 3 t + 4 t + 5 t + 6

GXB5005
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1PPS Output
The 1PPS output provides a timing pulse synchronized to GPS time once a valid fix is available.
The figure below shows the behavior of the 1PPS output signal after reset. For a period of 160μs after reset,
the 1PPS signal outputs the system clock. The actual 1PPS signal is activated at 500ms after reset.
CPU clock exists for 160µs after reset
1PPS signal output occurs 500ms after reset
Reset
ECLKOUT (1PPS)
Reset
ECLKOUT (1PPS)
Reset
ECLKOUT (1PPS)
500ms
160µs
145ns
(6.90MHz)
Expansion
Expansion
1+
1+
1+

GXB5005
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Backup Mode
The backup mode is established by setting all inputs Low except for B.U. (Vbat: 2.6 to 3.0V). In this mode, the
low power consumption can be achieved by stopping all oscillators except for RTC oscillator. Although all
registers are initialized, the SRAM for both of Ephemeris data and Almanac data in backup area are held.
Antenna Sense (Option)
The antenna sensing function detects three kinds of external active antenna connection conditions, open/
normal/short, by using A/D converter incorporated into the CXD2951.
The @ANT command shows the previous antenna sensing result and users would know the three kinds of
conditions. For details, see the CXD2951 Communication Command Specifications.
Threshold Levels
The threshold current Ir is as follows when VDD = 3.3V.
open: Ir < 3.6mA
normal: 3.7mA ≤Ir ≤44.0mA
short: 44.0mA < Ir
RTC
VDD
0
Voltage
(RFIN)
open normal short normal
T + 1 T + 2 T + 3 T + 4 T + 5 T + 6 T + 7 T + 8 T + 9 T + 10 T + 11 T + 12 T + 13 T + 14 T + 15 T + 16 T + 17 (Second)
Approx. 3s Approx. 3sApprox.1s
Antenna status detection timing
Antenna
condition

GXB5005
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Reference Circuit
The antenna sense circuit is available by putting a few components on the customer board.
Refer to the following diagram.
Command Specifications
The GXB5005 modules have a command format, NMEA-0183 version 3.01. A list of the supported UART
interface is as follows. For detailed descriptions, see the CXD2951 Communication Command Specification
document.
Customer Board
To Active
Antenna
Sense Resistor
(1/8W)
Antenna Power 3V
ANT Cont
AD In1
AD In0
22Ω
Antenna
Connector
10kΩ
Choke Coil
Inductor
GXB5005
CXD2951
EPORT12
EVON1
EVON0

GXB5005
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Mechanical Dimensions
(Unit: mm)
3.2
9.8
6 6
Max. 2.4
22.4
21.55
23.5
22
1.1 P = 2.2
1.2 Max. 1
P = 2.2
Top View
Tolerance: ±0.1
1.1
R0.4
Max. 2.4
4-perforation

GXB5005
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Label Printing
The following label containing these items is put on a module after inspections.
(The detailes of printing contents are specified separately.)
Manufacturer
Product name
Country of origin
Manufacturing company (MKM)
Manufacturing history: ٤٤ = year,ٌٌ = month, = day
Version of software
Code number(for inner control) 8-753-242-14
17mm
18mm
1
2
3
4
3
5
1
2
4
6
7
5
6
7
GXB5005
JAPAN MKM
Ver 1.0
8-٤٤٤-٤٤٤-٤٤
٤٤ٌٌ
SONY

GXB5005
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Tray
(Unit: mm)
Sectional view of A-A'
Sectional view of B-B'
Enlarged detail of D block (2:1)
Enlarged detail of C block (3:1)
A A'
B'
B
GXB5005
PS
6
CL
CL
CL
CL
P33 P33
Die side
P37
1+0
–1 7.8 ± 0.5
7.8 ± 0.5
/CTMKPI 2-R14
2-C10.5
2-C10
16-R5
Taper 0˚ (12 places)
4-R2 (Taper 5˚)
R3 (Taper 0˚)
φ9 (Taper 10˚)
C block
D block
4-R6
2-R15
2-R3
5.4
9
15
10.4
10.4
8
5
24
5.4
12.5
23
2
6
2
7.8
1.2
262 292
177
201.4
14.5
87 87
131
1 2.4 5.8 6.6
6.8 5.4
1
2.4
6.6
6.8
324
228
1+0
–1
1+0
–1
1+0
–1