u-blox ANTARIS 4 - USB Serial Po Rt (LEA -4 X and NEO-4 S)


your position is our focus
4.4.1.3 SPI Interface
ThestandardsoftwaredoesnotsupporttheSPIinterface.SPIisonlyusedonLEA-4R/TIM-4Rforconnectingthe
external sensors. It is also used to connect an optional EEPROM to NEO-4S for permanently saving of
configurationchanges.
4.4.2 U rt -4xSB Serial Po (LEA and NEO-4S)
A A-4x dNEO atur rt.Itis eUARTserialportsandcan
b no unication,b r
T llow figuration gsar FG onfig)–USB(UniversalSerialBus)
llLE receiversan -4Sfe eoneUSBserialpo analternativetoth
eused tonlyforcomm utalsotopowertheGPS eceiver.
hefo ingcon settin esupportedinUBX–C (C
Parameter Description
Power M
Defi Devicesdr (bus
pow erith ply(selfpowered
mod
ode
neswhetherthe awspowerovertheUSBpowerline
eredmode)orwheth asit’sownpowersup
e).
Automatic reconnection
Thisflagwillautomaticallyinitiateadisconnect-reconnectioncycletoupdate
theUSBdeviceinformationinthePC’sUSBportmanager.
hen changing any vendor-, product information or serial number Windows
wouldimmediatelyrequirethematchingdriverfiles.

Note W
Table 23: USB Configuration Parameter
 Note WhenusingUSBporttogetherwithFixNOWPowersavingMode,chooseBackupModeratherthan
deasPowerSavingMode. SleepMo
TheUSBinterfacesupportstwodifferentpowermodes.In the‘SelfPoweredMode’thereceiverispoweredby
itsownpowersupply.VDDUSBisusedtodetecttheavailability
ofUSBport.

USB
connector
USB port (optional)
27R
27R
LDO
3V
USB_DP
ANTARIS
®
4
GPSmodule
V
USB
USB
DM
USB
DP
VDDUSB
USB_DM
GPSMODE7
VCC
V
CC
GND

Figure 68: Self Powered USB Mode Schematic
Inthe‘Buspoweredmode’nopowersupplyfortheGPSreceiversisavailable.TheUSBbussuppliespowerupto
00mA.ToachieveaconstantVCCaLDOisarequirement.1
USB_DP
VDDUSB
USB_DM
ANTARIS
®
4
GPSmodule
GPSMODE7
USB
connector
USB port (optional)
27R
27R
LDO
3V
V
USB
USB
DM
USB
DP
VCC
GND

Figure 69: Bus Powered USB Mode Schematic
IfUSBserialportisnotusedconnectVDDUSBtoGNDandleaveGPSMODE7,USB_DMandUSB_DPopen.
GPSModules-SystemIntegrationManual(SIM)(incl.ReferenceDesign) ReceiverDescription
GPS.G4-MS4-05007-A1
  Page 81