Arduino® Portenta Vision Shield - LoRa
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Arduino® Portenta Vision Shield - LoRa
Modified: 07/02/2022
3.3 Digital Microphones
The dual MP34DT05 digital MEMS microphones are omnidirectional and operate via a capacitive sensing element
with a high (64 dB) signal to noise ratio. The microphones have been configured to provide separate left and right
audio over a single PDM stream.
The sensing element, capable of detecting acoustic waves, is manufactured using a specialized silicon
micromachining process dedicated to produce audio sensors
3.4 Micro SD Card Slot
A micro SD card slot is available under the Vision Shield board. Available libraries allow reading and writing to
FAT16/32 formatted cards.
3.5 Ethernet (ASX00021 Only)
Ethernet connector allows connecting to 10/100 Base TX networks using the Ethernet PHY available on the Portenta
board.
3.6 LoRa® Module (ASX00026 Only)
LoRa® connectivity is provided by the Murata CMWX1ZZABZ module. This module contains a STM32L0 processor
along with a Semtech SX1276 Radio. The processor is running on Arduino open source firmware based on Semtech
code.
3.7 Power
The Portenta H7 supplies 3.3V power to the LoRa® module (ASX00026 only), microSD slot and dual microphones
via the 3.3V output via the high density connector. An onboard LDO regulator supplies a 2.8V output (300mA) for
the camera module.
4 Board Operation
