–

–

–

–

36

37

Typical Applications

Figure 46 shows the F4 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