LEA-6 / NEO-6 - Hardware Integration Manual
GPS.G6-HW-09007-A Preliminary Design-in
Page 24 of 62
2.3 NEO-6 design
2.3.1 Passive antenna design (NEO-6)
This is a minimal setup for a PVT GPS receiver with a NEO-6 module.
Figure 13: Passive antenna design for NEO-6 receivers
The above design is for the USB in self-powered mode. For bus-powered mode pin 14 (CFG_COM0) must
be left open and VCC must be connected to VDDUSB. NMEA baud rate is 38400 when in self-powered
mode.
For best performance with passive antenna designs use an external LNA to increase the sensitivity up to
2dB.
Function PIN No I/O Description Remarks
Power VCC 23 I Supply Voltage Max allowed ripple on VCC=50mVpp
GND 10,12,13,24 I Ground Assure a good GND connection to all GND pins of the module,
preferably with a large ground plane.
V_BCKP 22 I Backup voltage
supply
It’s recommended to connect a backup battery to V_BCKP in order
to enable Warm and Hot Start features on the receivers. Otherwise
connect to GND.
VDDUSB 7 I USB Power
Supply
To use the USB interface connect this pin to 3.0 – 3.6V.
If no USB serial port used connect to GND.
Antenna RF_IN 11 I GPS signal
input from
antenna
The connection to the antenna has to be routed on the PCB. Use a
controlled impedance of 50 Ohm to connect RF_IN to the antenna
or the antenna connector.
VCC_RF 9 O Output Voltage
RF section
Pins 8 and 9 must be connected together. VCC_RF can also be used
to power an external active antenna.
UART TxD1 20 O Serial Port 1
RxD1 21 I Serial Port 1
3.6V tolerant serial input. Internal pull-up resistor to VCC. Leave
open if not used.
USB USB_DM 5 I/O USB I/O line USB2.0 bidirectional communication pin. Leave open if unused.
Implementation see Section 1.6.2
USB_DP 6 I/O USB I/O line
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