u-blox ANTARIS 4 - BOOT_INT- Boot Mode Selection; EXTINT - External Interrupt Pin

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GPS Module
RESET_N
RESET_N
NC7SZ125
VCC=1.65V to 5.5V
OE
GPS Module
RESET_N
10n
Diode with low
forward voltage
RESET_N

! umoutputvoltageatRESET_Nislimitedto1.8V.RESET_Nis
sensitiveeventoshortvoltagespikes.Keepthissignalcleanifroutedoutsidethemodule.
NEO-4Scanonlyberesetbyeithercyclingthepowersupply(VCC)orbesendingaUBX-CFG-RST
commandas
theRESET_NpinisnotavailableonNEO-4S.
4.9.3 BOOT_INT– Boot Mode Selection
This section des not apply to ROM based receivers.
BOOT_INT is used to set the boot mode of the ANTARIS
®
4 GPS Receiver. By default the receiver will boot in
normalGPSmode.IftherearecorrupteddatainFLASH,itmaybenecessarytobootthereceiverintestmodeby
pullingBOOT_INThighduringapowercycleorhardwareresettoupdatethefirmware.
Figure 95: Examples for wiring RESET_N
Warning DonotdriveRESET_Nhigh.Themaxim
RESET
ATR062x
BOOT_INT_N

Figure 96: BOOT_INT, Internal connection

 l
isonlyusedforproductiontestsatu-blox,henceno
jumperisrequired.
4.9.4 EXTINT - External Interrupt Pin
EXTINT0 (andoptionalEXTINT1)isanexternalinterruptpin.Thispinisusedinstandardconfigurationtoinitiate
apositionfixintheFixNOW™Mode.ArisingedgeatEXTINTwakesupthemoduleandinitiatesapositionfix
calculation.UsingtheANTARIS
®
4Software Customization Kit, EXTINTcaninitiateexternalinterruptstocustom
functions.
 Note EXTINTpinsareinternallypulleduptoVDD18,leaveEXTINTunconnectedifnotused.
Note This Pin is only needed if a firmware upgrade failed and therefore the firmware image is corrupt.
LeaveBOOT_INT unconnectedifnotused.
Note It’sadvisabletoforeseeajumperbetweenBOOT_INT_NandVCC.ForLowCostReceiversthissigna
GPSModules-SystemIntegrationManual(SIM)(incl.ReferenceDesign) ReceiverDescription
GPS.G4-MS4-05007-A1
  Page 122