Seeed XIAO nRF52840

As the first wireless product in the Seeed XIAO family, Seeed XIAO nRF52840 has equipped a powerful Nordic nRF52840 MCU which is designed in a Bluetooth 5.0 module, built around 32-bit ARM® Cortex™-M4 CPU with Floating-Point Unit(FPU) operating at 64Mhz.

Note: This product will NOT support Zigbee. Initial documentation and promotional material from Seeed suggested that it would, however as seen on this forum post, Seeed have retracted these statements.

Even with the added capability of a wireless connection, it still retains the Seeed XIAO series classic form-factor of small and exquisite which can be used for wearable devices and Internet of Things projects. In terms of power, it only uses 5μA in deep sleep and supports battery charge management thanks to the BQ25101 chip.

Compared to XIAO RP2040, the Seeed XIAO nRF52840 has a richer interface. The first thing to note is that the Near Field Communication (NFC) is functional on the board. Secondly, there is a tiny and elegant reset button on one side of the Type-C interface. On the other side is a three-in-one LED along with a power LED. There are 11 digital IOs that can be used as PWM pins and 6 analogue IOs that can be used as ADC pins. The board supports UART, IIC, and SPI all three common serial ports. Just like the XIAO RP2040, it has an onboard 2 MB flash which means it can also be programmed by Arduino, MicroPython, CircuitPython, or other program languages.

This comes in two options: board + headers and a pre-soldered board option. Please select an option before adding to cart.

The Seeed XIAO nRF52840 is compatible with the XIAO expansion board. We also stock the Seeed XIAO nRF52840 Sense!

All the I/O pins are 3.3V, please do not input more than 3.3V or the CPU may be damaged.

Features

Powerful CPU: Nordic nRF52840, ARM® Cortex™-M4 32-bit processor with FPU operating at 64 MHz
Wireless capabilities: Bluetooth 5.0, NFC
Ultra-small size: 21 x 17.5mm, Seeed Xiao series classic form-factor for wearable devices
Ultra-low sleep power: 5 μA, deep sleep model
Battery charging chip: BQ25101 chip supported lithium battery charge management
Rich interface: 1x Reset button, Ix UART, 1x IIC, 1x SPI, 1x NFC, 1x SWD, 11x GPIO, 6x ADC, 1x Three-in-one LED,1x User LED
Onboard 2 MB flash
Single-sided components, surface mounting design
Product number:
- Board + Loose Headers: Seeed 102010448
- Pre-soldered board: 102010631

Specifications

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