Modifications

{{bloc-etroit|text=This pin can be used as an input or output. As an input, supply 3.6 to 5.5VDC to power the Photon. When the Photon is powered via the USB port, this pin will output a voltage of approximately 4.8VDC due to a reverse polarity protection series schottky diode between VUSB and VIN. When used as an output, the max load on VIN is 1A.}}

{{bloc-etroit|text=This pin can be used as an input or output. As an input, supply 3.6 to 5.5VDC to power the Photon. When the Photon is powered via the USB port, this pin will output a voltage of approximately 4.8VDC due to a reverse polarity protection series schottky diode between VUSB and VIN. When used as an output, the max load on VIN is 1A.}}

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| RST ||Active-low reset input. On-board circuitry contains a 1k ohm pull-up resistor between RST and 3V3, and 0.1uF capacitor between RST and GND.

| RST ||

{{bloc-etroit|text=Active-low reset input. On-board circuitry contains a 1k ohm pull-up resistor between RST and 3V3, and 0.1uF capacitor between RST and GND.}}

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| VBAT ||Supply to the internal RTC, backup registers and SRAM when 3V3 is not present (1.65 to 3.6VDC).

| VBAT ||Supply to the internal RTC, backup registers and SRAM when 3V3 is not present (1.65 to 3.6VDC).