GPS SiRFstarIV Evaluation Kit EVA2200-A for GPS Receiver Module A2200-A User Guide
22
9 Board Schematics
The following shows the schematics of the EVA2200-A. For best readability the
picture was enlarged to cover the complete page.
Please note that the design is done in a way that it reflects the Minimum Configura-
tion as outlined in the GPS Receiver Manual A2200! These are especially:
•
The A2200-A needs an external pull-up resistor to be configured for UART
operation. Please consider the pull-up resistor in your design or pull the GPIO
up right after reset by other means.
•
The ON_OFF input of the A2200-A needs to be connected to a push-pull
output of a microprocessor. For a wake-up, including the initial one after power
on, a LOW-HIGH transmission is mandatory.
•
The nRST pin of the A2200-A needs to be connected to an open collector /
open drain output of a microprocessor! This is necessary to work with
SiRFaware
TM
. Pulling nRST low and afterwards toggling of ON_OFF will get
the module to report a position fix when in SiRFaware
TM
mode.
The following picture shows the minimum configuration for using the A2200-A in
UART mode with a passive antenna. In addition VANT are supported on the evalu-
ation board!
Figure 17: Minimum configuration A2200-A
