ATR0635 Datasheet, PDF (16/33 Pages) ATMEL Corporation – ANTARIS4 Single-chip GPS Receiver SuperSense

Table 3-13. Pin Usage of Active Antenna Supervisor
Pin
Usage
Meaning
P0/NANTSHORT NANTSHORT
Active antenna short circuit detection
High = No antenna DC short circuit present
Low = Antenna DC short circuit present
P25/NAADET0/
MISO or
P14/NAADET1
NAADET
Active antenna detection input
High = No active antenna present
Low = Active antenna is present
P15/ANTON
ANTON
Active antenna power on output
High = Power supply to active antenna is switched on
Low = Power supply to active antenna is switched off
Table 3-14. Antenna Detection I/O Settings
GPSMODE11 GPSMODE10 GPSMODE8
(Reset = PU) (Reset = PU) (Reset = PU) Location of NAADET
0
0
0
P25/NAADET0/MISO
0
0
1⁽¹⁾
P25/NAADET0/MISO
0
1⁽¹⁾
0
P14/NAADET1
0
1⁽¹⁾
1⁽¹⁾
P14/NAADET1
(Default ROM value)
1⁽¹⁾
0
0
P14/NAADET1
1⁽¹⁾
0
1⁽¹⁾
1⁽¹⁾
1⁽¹⁾
1⁽¹⁾
Note: 1. Leave open
1⁽¹⁾
P14/NAADET1
0
P25/NAADET0/MISO
1⁽¹⁾
P25/NAADET0/MISO
Comment
Reserved for further use.
Do not use this setting.
Reserved for further use.
Do not use this setting.
Reserved for further use.
Do not use this setting.
The Antenna Supervisor Software will be configured as follows:
1. Enable Control Signal
2. Enable Short Circuit Detection (power down antenna via ANTON if short is detected via
NANTSHORT)
3. Enable Open Circuit Detection via NAADET
The antenna supervisor function may not be disabled by GPSMODE pin selection.
If the antenna supervisor function is not used, please leave open ANTON, NANTSHORT and
NAADET.
16 ATR0635
4928C–GPS–06/06