Spec

• nRF52840 Breakout and Development Board
• The nRF52840 Mini is a Nordic Semiconductor nRF52840 development board with ARM Cortex-M4 CPU and Bluetooth wireless communication. It can also be ***d as a breakout board. It's about the same size as an Arduino Pro Mini, and can take advantage of most of the I/O pins needed for GPIO and power (except those covered by the Qwiic connector). It also features a USB interface using nRF52840 native USB, LiPo battery charger, Qwiic connector, on/off switch, reset switch and ***r LED/button.
• The board comes pre-programmed with a USB bootloader that allows you to develop nRF52840 programs using either Arduino, Circuit Python, or C (using Nordic's nRF5 SDK) and load the compiled code using USB or a storage interface.
• Get Started with the SparkFun Pro nRF52840 Mini Guide
• Specifications
• ARM Cortex-M4 CPU with floating point unit (FPU)
• 1MB Flash
• 256kB RAM for stack and heap storage
• Bluetooth 5, Bluetooth Low Energy (BLE)
• Interface: USB, UART, I2C, SPI
• A/D converter (ADC): 8 pins support analog inputs
• PWM: Timer support on any pin
• Real-time clock (RTC)
• [Reference]
• Schematic
• Eagle Files
• Hookup Guide
• Datasheet (MDBT50Q)
• Bootloader Source Code
• Nordic nRF5 SDK
• Arduino Core for nRF Boards
• CircuitPython nRF Port
• GitHub