Rainbow-electronics DAB-GPS-C01 Manual de usuario descargar pdf (Pagina 4)

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LEA-5H,LEA-5S,LEA-5A-DataSheet Preliminary u-bloxproprietary 

GPS.G5-MS5-07026-P4

  Page 4

your position is our focus

1.3 Block Diagram

RF Front-End

with

Integrated LNA

Baseband Processor

Power

Management

TCXOor XTAL

RTC

FLASH EPROM

(optional)

Antenna

Supervision

(optional)

PowerControl

RF_IN

V_ANT

AADET_N

VCC_RF

VCC

V_BACKUP

GND

VCC

_OUT

UART

EXTINT

RESET_N

USB V2.0

CFG_COM1

Digital

IFFilter

Backup

RAM

ROMCode

GPS/GALILEO

Engine

ARM7CPU

SRAM

TIMEPULSE

SAW

Filter

RTC

VDDIO

DDC

SPI

Figure 1: Hardware Block Schematic

1.4 Assisted GPS (A-GPS)

Supplyof aidinginformationlikeephemeris,almanac,roughlast positionand timeandsatellitestatus andan

optional time synchronization signal will reduce time to first fix significantly and improve the acquisition

sensitivity.AllLEA-5modulessupporttheu-bloxAssistNowOnline

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andAssistNowOffline



A-GPSservicesandare

OMASUPLcompliant.

1.5 KickStart

Anewfeatureavailablewithu-blox5receivermodulesisSuperSense

KickStart.ThisfunctionalityusesaTCXO

toaccelerateweaksignalacquisition,enablingfasterstartandreacquisitiontimes.KickStartisavailablewiththe

LEA-5HandLEA-5S.

1.6 GALILEO

The u-blox 5 is a GNSS chip that receives and tracks GPS and GALILEO signals simultaneously, enhancing

accuracy and coverage. When GALILEO-L1 signals become available, u-blox 5 receivers equipped with FLASH

memorywillbecapableofreceivingandprocessingthemviaasimpleupgrade.Theabilitytoreceiveandtrack

GALILEOsatellitesignalswillresul

tinhighercoverage,improvedreliabilityandbetteraccuracy.

1.7 Protocols

Protocol Type

NMEA Input/output,ASCII,0183,2.3(compatibleto3.0)

UBX Input/output,binary,u-bloxproprietary

Table 2: Available Protocols

Both protocols are available on UART, USB, DDC and SPI. For specification of the various protocols see the

u-blox 5 Protocol Specification [2].

1 2 3 4 5 6 7 8 9 ... 14 15

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