V1.2 – May-11
User’s Manual
Page 14 of 37
3 Quick Start
In order to allow an easy and quick start with the A2100-A module, this chapter
provides a short overview on the important steps to be taken to receive NMEA
messages with position information on a serial port (UART).
NOTE 1
: The A2100-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.
NOTE 2
: The ON_OFF input of the A2100-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.
NOTE 3
: It is recommended to connect the nRST pin of the A2100-A to an open
collector / open drain output of a microprocessor!
3.1 Minimum Configuration
The following picture shows the minimum configuration for NMEA or binary outputs
received and commands sent via an RS232 interface based on the GPS module
A2100-A using a passive antenna.
A2100-A
GSD4e
UART
ON_OFF
Tx
Rx
GND
3.3V
ANT_EXT
ANT_GND
Vcc
Shown from top without lid; pads shown for better understanding
Pin 1
marker
10k
Ω
nRST
A2100-A
GSD4e
UART
ON_OFF
Tx
Rx
GND
3.3V
ANT_EXT
ANT_GND
Vcc
Shown from top without lid; pads shown for better understanding
Pin 1
marker
10k
Ω
nRST
Figure 5: Minimum configuration A2100-A
NOTE
: It is recommended to supply Vcc continuously! Use SiRFaware
TM
or
other low power modes to reduce power consumption of the module while no
position information is required.
