V0.1– Oct-14
User’s Manual
Page 9 of 17
4 On-Board Peripherals
4.1 RESET and ON_OFF Push-Button
The EVA2135-H holds two push-buttons:
•
nRST (RESET)
•
ON_OFF
After power on by
pushing the “ON” button will start the A2135-H module. This is
absolutely necessary to get the module going. The “ON” button must be used as well
in other cases, e.g. in order to request a position when in SiRFawareTM state or to
go
to hibernate mode and wake up again.
The “nRST” button is used to get a full reset of the GPS module. All parameters are
stored in non-volatile memory. After pushing this button the module starts again from
the beginning.
4.2 External Antenna Connector
The A2135-H supports two antenna inputs:
•
The on-module antenna.
•
The antenna connector “External Antenna” leads to pin 10 of the A2135-H GPS
receiver which supports active GPS antennas.
It can be switched between the two antenna inputs by using the ANT_SW pin of the
A2135-H connected to the DIP switch on board the EVA2135-H evaluation kit.
Setting the DIP switch to “OFF” means the on-module is activated.
Setting the DIP switch to “ON” means the External Antenna input is activated.
Figure 6: On-module antenna and External Antenna Connector
Further information is given in
•
Chapter “6.2 DIP Switch Settings” and Maestro’s GPS Receiver A2135-H User
Manual.
On-module antenna
External Antenna
