u-blox ANTARIS 4 - Page 169

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LEA-LA LEA-4H / LEA-4P Remarks for Migration
Pin
PinName TypicalAssignment PinName TypicalAssignment 
modeisincreasedbyupto50µA
22 GPSMODE2
ConnectedtoGND
orVDD_18OUT
PCS2_N
Notconnected
Backwardcompatible:canbeleftopenor
connectedtoGND,VDDIOorVDD_18OUT.
23 NC
Notconnected
SCK
Notconnected
24 NC
ConnectedtoGND
VDDUSB
ConnectedtoGND
orVDD_USB
25 NC
Notconnected
USB_DM
Notconnected
26 NC
Notconnected
USB_DP
Notconnected
PlacingaLEA-4xintoanexistingLEA-LAboard
designwilldisableUSBport.
27 EXTINT0
Connectedto
VDD18OUT
EXTINT0
Notconnected
Donotaddanexternalpullupresistor;thereis
onebuilt-intoV_BAT.Leaveopenifnotused.
28 TIMEPULSE
1.8Vout
TIMEPULSE
VDDIOlevelI/O
ConsiderthatTIMPULSEonLEA-4xisonVDDIO
voltagelevel(1.8VonLEA-LA)
J:Pinstobecheckedcarefully
Table 80: Pin-out comparison LEA-LA vs. LEA-4x
GPSModules-SystemIntegrationManual(SIM)(incl.ReferenceDesign) MigrationtoANTARISP®P4receivers
GPS.G4-MS4-05007-A1
  Page 169