ATR0625-EK1 Atmel, ATR0625-EK1 Datasheet - Page 12

• Manufacturer Part Number: ATR0625-EK1
• Manufacturer: Atmel

Specifications of ATR0625-EK1

• Lead Free Status / Rohs Status: Supplier Unconfirmed

3.3.4
3.3.5
12
ATR0625P
USB Power Mode
Active Antenna Supervisor
The following settings apply if GPSMODE configuration is not enabled, that is, GPSMODE = 0
(ROM-Defaults):
Table 3-11.
For correct response to the USB host queries, the device has to know its power mode. This is
configured via GPSMODE7. If set to bus powered, an upper current limit of 100 mA is reported
to the USB host; that is, the device classifies itself as a “low-power bus-powered function” with
no more than one USB power unit load.
Table 3-12.
The two pins P0/NANTSHORT and P15/ANTON plus one pin of P25/NAADET0/MISO or
P14/NAADET1 are always initialized as general purpose I/Os and used as follows:
Baud Rate (kBaud)
Input Protocol
Output Protocol
Messages
Information Messages
(UBX INF or NMEA
TXT)
Note:
GPSMODE7 (Reset = PU) Description
• P15/ANTON is an output which can be used to switch on and off antenna power supply.
• Input P0/NANTSHORT will indicate an antenna short circuit, i.e. zero DC voltage at the
• Input P25/NAADET0/MISO or P14/NAADET1 will indicate a DC current into the antenna. In
antenna, to the firmware. If the antenna is switched off by output P15/ANTON, it is assumed
that also input P0/NANTSHORT will signal zero DC voltage, i.e. switch to its active low state.
case of short circuit, both P0 and P25/P14 will be active, i.e. at low level. If the antenna is
switched off by output P15/ANTON, it is assumed that also input P25/NAADET0/MISO will
signal zero DC current, i.e. switch to its active low state. Which pin is used as NAADET (P14
or P25) depends on the settings of GPSMODE11 and GPSMODE10 (see
page
1. Leave open
13).
1
0
(1)
Serial I/O Default Setting if GPSMODE Configuration is Deselected
(GPSMODE0 = 0)
USB Power Modes
USB
NMEA
User, Notice, Warning,
Error
UBX, NMEA
NMEA
GGA, RMC, GSA, GSV
USB device is bus-powered (maximum current limit 100 mA)
USB device is self-powered (default ROM value)
USART1
NMEA
57.6
UBX, NMEA, RTCM
NMEA
GGA, RMC, GSA, GSV
User, Notice, Warning,
Error
USART2
UBX
57.6
UBX, NMEA, RTCM
UBX
NAV: SOL, SVINFO
MON: EXCEPT
User, Notice, Warning,
Error
Table 3-14 on
4925G–GPS–06/08