Front; Microcontroller; Neural Decision Processor - Arduino Nicla Voice Reference Manual

Arduino® Nicla Voice

4.2.3 Front

Nicla Voice Front View

4.3 Microcontroller

The Arduino® Nicla Voice is powered by a nRF52832 SoC within the ANNA-B112 module (MD1). The nRF52832 SoC
is built around an ARM® Cortex-M4 microcontroller with floating point unit running at 64 MHz. Sketches are stored
inside the nRF52832 internal 512 KB FLASH which is shared with the bootloader. 64 KB SRAM is available to the
user. The ANNA-B112 acts as the SPI host for the data logging 16MB flash (U7). While the module itself runs at 1.8
V, a level shifter can adjust the logic level between 1.8 V and 3.3 V depending on the LDO set in BQ25120 (U9). An
external oscillator (Y1) provides a 32 KHz signal. The ANNA-B112 acts as the SPI host for the data logging 16MB
flash (U7) and the Syntiant® NDP120 IC (U3).

4.4 Neural Decision Processor

The Arduino® Nicla Voice integrates a Neural Decision Processor™ NDP120 from Syntiant® (U3). The NDP120
leverages Syntiant Core 2™ ultra-low-power deep neural network inference engine to move larger neural networks
into always-on domains with the capacity to run multiple applications simultaneously with minimal power
consumption, including keyword spotting and event detection. The Syntiant® NDP120 IC (U3) also acts as the SPI
host for the BMM150 3-axis magnetometer (U4) and the BMI270 6-axis IMU (U15).
12 / 25 Arduino® Nicla Voice Modified: 05/01/2023