Datasheet

Reverse Side Breakouts
On the back we also have a few breakouts!
Opt VBat: If you fancy, you can solder on a JST 2-PH connector (http://adafru.it/1769), this will let you easily plug in a Lithium Ion or other battery
pack. This connector pad is diode protected so you can use both Vin and VBat and the regulator will automatically switch to the higher voltage
Opt. 32 KHz: If you're doing some funky low power work, we wanted to give you the option of solderin in a 32khz oscillator.
(http://adafru.it/f4U)Our firmware doesn't support it yet but its there!
SWC: This is the SWD clock pin, 3v logic - for advanced hackers!
SWD: This is the SWD data pin, 3v logic - for advanced hackers!
3Vo: This is the output from the 3V regulator, for testing and also if you really need regulated 3V, up to 250mA available
FCR: This is the factory reset pin. When all else fails and you did something to really weird out your module, tie this pad to ground while powering
up the module and it will factory reset. You should try the DFU reset method first tho (see that tutorial page)
© Adafruit Industries
https://learn.adafruit.com/introducing-the-adafruit-bluefruit-le-uart-
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