Datasheet

These are the pins that are involved with powering the GPS. Starting from the right are the required power pins:

VIN - power input, connect to 3-5VDC. It's important to connect to a

clean and quiet

power supply. GPS's are very

sensitive, so you want a nice and quiet power supply. Don't connect to a switching supply if you can avoid it, an

LDO will be less noisy!

GND - power and signal ground. Connect to your power supply and microcontroller ground.

Then, on the left are some optional power pins:

VBAT is an input pin - it is connected to the GPS real time clock battery backup. We suggest using the battery

spot on the back but if you have a project with a coin cell or other kind of battery that you want to use (and its

under 3.3V) you can connect it to the VBAT pin. For V1 and V2 modules: If you do this, be sure to cut the trace on

the back between the RTC solder pads

EN is the Enable pin, it is pulled high with a 10K resistor. When this pin is pulled to ground, it will turn off the GPS

module. This can be handy for very low power projects where you want to easily turn the module off for long

periods. You will lose your fix if you disable the GPS and it will also take a long time to get fix back if you dont

have the backup battery installed.

3.3V is the output from the onboard 3.3V regulator. If you have a need for a clean 3.3V output, you can use this! It

can provide at least 100mA output.

Serial Data Pins