Sony GXB5005 Bedienungsanleitung

- 1 - E05728B67

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

- 2 -

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

- 3 -

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

- 4 -

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

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

- 5 -

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

- 6 -

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

- 7 -

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

- 8 -

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

Tracking

1.0s

Searching

Positioning

1234

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

- 9 -

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.

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

- 10 -

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

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