ATR0635 Datasheet, PDF (18/33 Pages) ATMEL Corporation – ANTARIS4 Single-chip GPS Receiver SuperSense

Table 3-15. Recommended Pin Connections
Pin Name
Recommended External Circuit
P0/NANTSHORT
Internal pull-down resistor; leave open if Antenna Supervision functionality is unused.
P1/GPSMODE0
Internal pull-down resistor; leave open in order to disable the GPSMODE pin configuration feature. Connect
to VDD18 to enable the GPSMODE pin configuration feature. Refer to GPSMODE definitions in “Setting
GPSMODE0 to GPSMODE12” on page 12.
P2/BOOT_MODE
Internal pull-down resistor; leave open.
P8/STATUSLED
Output in default ROM firmware: leave open if not used
P9/EXTINT0
Internal pull-up resistor; leave open if unused.
P12/GPSMODE2/NPCS2
Internal pull-up resistor; can be left open if the GPSMODE feature is not used. Refer to GPSMODE
definitions in “Setting GPSMODE0 to GPSMODE12” on page 12.
P13/GPSMODE3/
EXTINT1
Internal pull-up resistor; can be left open if the GPSMODE feature is not used. Refer to GPSMODE
definitions in “Setting GPSMODE0 to GPSMODE12” on page 12.
P14/NAADET1
Internal pull-down resistor; leave open if Antenna Supervision functionality is unused.
P15/ANTON
Internal pull-down resistor; leave open if Antenna Supervision functionality is unused.
P16/NEEPROM
Internal pull-up resistor; leave open if no serial EEPROM is connected. Otherwise connect to GND.
P17/GPSMODE5/SCK1
Internal pull-down resistor; can be left open if the GPSMODE feature is not used. Refer to GPSMODE
definitions in “Setting GPSMODE0 to GPSMODE12” on page 12.
P18/TXD1
Output in default ROM firmware: leave open if serial interface is not used.
P19/GPSMODE6/SIGLO1
Internal pull-up resistor; can be left open if the GPSMODE feature is not used. Refer to GPSMODE
definitions in “Setting GPSMODE0 to GPSMODE12” on page 12.
P20/TIMEPULSE/SCK2 Output in default ROM firmware: leave open if time pulse feature is not used.
P21/TXD2
Output in default ROM firmware: leave open if serial interface not used.
P22/RXD2
Internal pull-up resistor; leave open if serial interface is not used.
P23/GPSMODE7/SCK
Internal pull-up resistor; can be left open if the GPSMODE feature is not used. Refer to GPSMODE
definitions in “Setting GPSMODE0 to GPSMODE12” on page 12.
P24/GPSMODE8/MOSI
Internal pull-up resistor; can be left open if the GPSMODE feature is not used. Refer to GPSMODE
definitions in “Setting GPSMODE0 to GPSMODE12” on page 12.
P25/NAADET0/MISO
Internal pull-down resistor; leave open if Antenna Supervision functionality is unused.
P26/GPSMODE10/NSS/ Internal pull-up resistor; can be left open if the GPSMODE feature is not used. Refer to GPSMODE
NPCS0
definitions in “Setting GPSMODE0 to GPSMODE12” on page 12.
P27/GPSMODE11/NPCS1
Internal pull-up resistor; can be left
definitions in “Setting GPSMODE0
open if the GPSMODE feature
to GPSMODE12” on page 12.
is
not
used.
Refer
to
GPSMODE
P29/GPSMODE12/NPCS3
Internal pull-up resistor; can be left
definitions in “Setting GPSMODE0
open if the GPSMODE feature
to GPSMODE12” on page 12.
is
not
used.
Refer
to
GPSMODE
P30/AGCOUT0
Internal pull-down resistor; leave open.
P31/RXD1
Internal pull-up resistor; leave open if serial interface is not used.
18 ATR0635
4928C–GPS–06/06