ZED-F9P-Integration Manual
UBX-18010802 - R02

5 Hardware description Page 78 of 114
Advance Information
CFG-HW-ANT_CFG_OPENDET = 1
Result..
• MON-RF in u-center: Antenna status = OK. Antenna power status = ON
• ANT_OFF = active high therefore pio is low to enable external antenna
• ANT_SHORT_N = active low therefore pio is high (pio pull up enabled to be pulled low if shorted)
• ANT_DETECT = active high therefore pio is high (pio pull up enabled to be pulled low if ant not
detected)
Start up message at power up if config stored:
$GNTXT,01,01,02,ANTSUPERV=AC SD OD PDoS SR*15
$GNTXT,01,01,02,ANTSTATUS=INIT*3B
$GNTXT,01,01,02,ANTSTATUS=OK*25
ANTSUPERV=AC SD OD PDoS SR (indicates open circuit detection added - OD)
Then if ANT_DETECT is pulled low to indicate no antenna:
$GNTXT,01,01,02,ANTSTATUS=OPEN*35
Then if ANT_DETECT is left floating or it is pulled high to indicate antenna connected:
$GNTXT,01,01,02,ANTSTATUS=OK*25
5.3.11 EXTINT
EXTINT is an external interrupt pin with fixed input voltage thresholds with respect to VCC. It can
be used for functions such as accurate external frequency aiding and ON/OFF control. Leave open
if unused, this function is disabled by default.
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