User`s manual

PRELIMINARY
V0.5 – Feb-11 User’s Manual Page 14 of 22
5 On-Board Peripherals
5.1 ON and RESET Push-Button
The EVA2100-A holds two push-buttons:
• ON (ON / OFF functionality)
• nRST (RESET functionality)
After power on pushing the “ON” button will start the A2100-A 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 SiRFaware
TM
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.
5.2 Antenna Connector
The A2100 -A supports one antenna input. Both antennas, the active and the passive
one, can be connected to this input.
As the active antenna needs voltage supplied through the VANT pin of the module,
please make sure that the VANT DIP switch is in “ON” position.
Note: Do not supply voltage externally when VANT DIP switch is in “ON” position,
leave terminal open!
If the DIP switch is in “OFF” position, an according voltage (3.3V to 5.0V) must be
supplied through the VANT terminal of the terminal block.
Figure 12: Antenna connector and VANT DIP switch with terminal