18

4920B–GPS–06/06

ATR0630 [Preliminary]

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/

NPCS0

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.

P27/GPSMODE11/NPCS1

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.

P29/GPSMODE12/NPCS3

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.

P30/AGCOUT0

Internal pull-down resistor; leave open.

P31/RXD1

Internal pull-up resistor; leave open if serial interface is not used.