V1.1 – Mar-11
User’s Manual
Page 13 of 18
6.2 DIP Switch Settings
The following picture shows the DIP switches of the EVA1084-A.
Figure 9: DIP switches
Switch Function
Operation via USB connector
(default settings)
Operation via
terminal block
S1 BOOTSEL
OFF
OFF
(*2)
S2 RFPWUP
ON
OFF
S3
ON_OFF
ON OFF
S4
RX0
ON OFF
S5 TX0 ON
OFF
ON = high (A1084-A pin 9,
active antenna / auxiliary antenna)
S6 ANT_SW
OFF = low (A1084-A pin 12,
passive antenna / primary antenna)
not applicable
S7 VBAK
ON
OFF
(*1)
S8 VCC ON
OFF
Table 3: Switch settings
*1: S7 has to be OFF to use an external VBAK supply.
S7 has to be ON to use the onboard Supercap.
*2: The BOOT switch can be set to flash Firmware to the A1084-A GPS receiver.
Switch the BOOTSEL switch to “ON”, press and release the nRST button. The
A1084-A is now waiting to receive new firmware data via UART.
After upgrading the firmware switch the BOOTSEL switch to “OFF” and press
and release the nRST button for restarting normal GPS receiver operation.
Related software tool and documentation: SIRF_Flash