Linx Technologies RXM-GPS-F4 - Manual (Page 21)

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Typical Applications
Figure 46 shows the R4 Series GPS receiver in a typical application using a
passive antenna.
A microcontroller UART is connected to the receiver’s UART for passing
data and commands. A 3.3V coin cell battery is connected to the
VBACKUP line to provide power to the module’s memory when main
power is turned off.
Figure 47 shows the module using an active antenna.
A 300 Ω ferrite bead is used to put power from VOUT onto the antenna line
to power the active antenna.
GPIOD 1
GPIOE 2
1PPS 3
TX 4
RX 5
GND 21
GPIOC 6
P1 7
/RESET 8
RFPWRUP 9
ON_OFF 10
GND 20
RFIN 19
GND 18
NC 17
NC 16
GND 22
GPIOB 15
GPIOA 14
G1 13
VCC 12
P2 11
µP TX
RX
GND
VCC
GND
GND
VCC
1.8V
300Ω
Ferrite Bead
OUT
IN
Level
Shifter
GND
GND
GND
VCC
18pF
2.2k
2.2k
1.8V
GND
100k
GPIOD 1
GPIOE 2
1PPS 3
TX 4
RX 5
GND 21
GPIOC 6
P1 7
/RESET 8
RFPWRUP 9
ON_OFF 10
GND 20
RFIN 19
GND 18
NC 17
NC 16
GND 22
GPIOB 15
GPIOA 14
G1 13
VCC 12
P2 11
µP TX
RX
GND
VCC
GND
GND
VCC
1.8V
OUT
IN
Level
Shifter
GND
GND
GND
2.2k
2.2k
1.8V
GND
100k
Figure 46: Circuit Using the F4 Series Module with a Passive Antenna
Figure 47: Circuit Using the F4 Series Module with a an Active Antenna
Master Development System
The F4 Series Master Development System provides all of the tools
necessary to evaluate the F4 Series GPS receiver module. The system
includes a fully assembled development board, an active antenna,
development software and full documentation.
The development board includes a power supply, a prototyping area for
custom circuit development, and an OLED display that shows the GPS
data without the need for a computer. A USB interface is also included
for use with a PC running custom software or the included development
software.
The Master Development System software enables configuration of the
receiver and displays the satellite data output by the receiver. The software
can select from among all of the supported NMEA protocols for display of
the data.
Full documentation for the board and software is included in the
development system, making integration of the module straightforward.
Figure 48: The F4 Series Master Development System
Figure 49: The F4 Series Master Development System Software