User`s manual

V1.0 – Feb-09 User’s Manual Page 9 of 18
4 On-Board Peripherals
4.1 RESET and ON_OFF Push-Button
The EVA1035-H holds two push-buttons:
• nRST (RESET)
• ON_OFF
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.
The ON_OFF button puts the A1035-H GPS receiver into Hibernate state if it is on
and wake up if it is in sleep state. During sleep state the receiver draws 20µA typi-
cally and maintains RTC and SRAM.
Hibernate mode is supported by Firmware version 3.2.5 and later.
4.2 External Antenna Connector
The A1035-H supports two antenna inputs:
• The on-module antenna.
• The antenna connector “External Antenna” leads to pin 8 of the A1035-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
A1035-H connected to the DIP switch on board the EVA1035-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.
On-module antenna
External Antenna
Figure 6: On-module antenna and External Antenna Connector