Features

 

Seeed Studio XIAO nRF52840 Sense has an ultra-low power consumption of only 5 ?A in the deep sleep mode, the embedded BQ25101 chip supports battery charge management which prolongs its use time. Moreover, Seeed Studio XIAO nRF52840 Sense supports the USB Type-C interface which can supply power and download code. It also has rich On-chip Memory of 1 MB flash and 256 kB RAM, and an Onboard Memory of 2 MB QSPI flash. There are 11 digital i/o that can be used as PWM pins and 6 analog i/o that can be used as ADC pins. It supports UART, IIC, and SPI all three common serial ports. 1 Reset button, 1 3-in-one LED, 1 Charge LED, and 1 Bluetooth antenna are on board, allowing developers to debug their code very easily.

As the advanced yet smaller version of the Seeed Studio XIAO nRF52840, it carries two extra onboard sensors. One of them is a digital microphone created through Pulse Density Modulation(PDM) module on the nRF52840 chip. It can receive audio data in real-time which allows it can be used for audio recognition. The board can receive audio data through the MSM261D3526H1CPM microphone. The other one is 6-axis Inertial Measurement Unit(IMU) which can be applied in TinyML projects like gesture recognition.

The powerful performance makes it perfect for TinyML AIoT projects requiring gesture/voice recognition, and the tiny size allows it to be used in wearable devices and Internet of Things projects, not just for prototypes but the mass production. Furthermore, Seeed Studio XIAO nRF52840 Sense is friendly to the communities for its strong software compatibilities, which supports Arduino, Micropython, and CircuitPython. Except for the software, flexible I/O allows it to speak to almost any external device.

Specification

Item	Seeed Studio XIAO nRF52840	Seeed Studio XIAO nRF52840 Sense
Processor	Nordic nRF52840	The same as Seeed Studio XIAO nRF52840
	ARM� Cortex�-M4 with FPU runs up to 64 MHz
Wireless	Bluetooth 5.0/NFC	The same as Seeed Studio XIAO nRF52840
On-chip Memory	1 MB flash and 256 kB RAM	The same as Seeed Studio XIAO nRF52840
Onboard Memory	2 MB QSPI flash	The same as Seeed Studio XIAO nRF52840
Interface	1xUART, 1xIIC, 1xSPI, 1xNFC, 1xSWD,	The same as Seeed Studio XIAO nRF52840
	11xGPIO(PWM), 6xADC
Sensors	?-	Onboard PDM digital microphone
		Onboard 6-axis IMU
Dimensions	21 x 17.5mm	The same as Seeed Studio XIAO nRF52840
Power	Circuit operating voltage: 3.3V@200mA	The same as Seeed Studio XIAO nRF52840
	Charging current: 50mA/100mA
	Input voltage (VIN): 5V
	Standby power consumption: <5?A

 

Application

• Small and flexible wearable device


• Wifi/Bluetooth controlled wireless connection project


• Embedded Machine Learning Project


• IoT and TinyML AI applications


• Great for mini Arduino projects