Arduino® Nicla Voice
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Arduino® Nicla Voice
Modified: 05/01/2023
4.9 Power Tree
Nicla Voice Power Tree
The Arduino® Nicla Voice can be powered via micro USB (J7), ESLOV (J5) or VIN pin. The input power is converted
into the relevant voltages via the BQ2512BAYFPR IC (U9). A Schottky diode provides reverse polarity protection to
the USB and ESLOV voltages. When voltage is supplied via the micro USB, a linear 3.3 V regulator also provides
power to the SAMD11 microcontroller used for programming the board as well as for JTAG and SWD. The LED
driver (U8) and RGB Leds (DL1) are driven by a boost voltage of 5V. All other components operate off the 1.8 V rail
regulated by a buck converter. PMID acts as an OR switch between VIN and BATT and operates the LED driver. All
I/O broken out to the pins are fed through a bi-direction voltage translator running at V
DDIO_EXT
.
Additionally, the BQ25120AYFPR (U9) also provides support for a single cell 3.7 V LiPo/Li-ion battery pack connected
to J4, allowing the use of the board as a wireless sensor network.
