Adafruit Wireless Feather nRF52 Pro with myNewt Bootloader - nRF52832

The Adafruit Feather nRF52 Pro is another Bluetooth Low Energy board for advanced projects and users who want to use a fully open source Bluetooth Low Energy 5.0 stack. It has a native-Bluetooth chip, the nRF52832, as well as built in USB Serial and battery charging! 

The Adafruit Feather nRF52 Pro ships pre-programmed with the Mynewt serial bootloader that allows you to flash firmware to the device directly from the command-line using the on-board USB Serial converter and the 'newtmgr' tool, so you can get started right away with no additional hardware required. For more advanced debugging, however, you can use a Segger J-Link and the on-board SWD debug connector, which gives you access to a more powerful set of development tools and options.

Technical Details of Feather nRF52 Pro

• ARM Cortex M4F (with HW floating point acceleration) running at 64MHz
• 512KB flash and 64KB SRAM
• Built in USB Serial converter for fast and efficient programming and debugging
• Bluetooth Low Energy compatible 2.4GHz radio (Details available in the nRF52832 product specification)
• FCC / IC / TELEC certified module
• Up to +4dBm output power
• 1.7v to 3.3v operation with internal linear and DC/DC voltage regulators
• 19 GPIO, 8 x 12-bit ADC pins, up to 12 PWM outputs (3 PWM modules with 4 outputs each)
• Pin #17 red LED for general purpose blinking
• Power/enable pin
• Measures 2.0" x 0.9" x 0.28" (51mm x 23mm x 8mm) without headers soldered in
• Light as a (large) feather - 5.7 grams
• 4 mounting holes
• Reset button
• SWD connector for debugging
• 100% open source firmware when used with Apache Mynewt
• 

Technical Details of nRF52832

• 2.4 GHz transceiver
  • -96 dBm sensitivity in Bluetooth low energy mode
  • Supported data rates: 1 Mbps, 2 Mbps Bluetoothlow energy mode
  • -20 to +4 dBm TX power, configurable in 4 dB steps
  • On-chip balun (single-ended RF)
  • 5.3 mA peak current in TX (0 dBm)
  • 5.4 mA peak current in RX
  • RSSI (1 dB resolution)
• ARM® Cortex®-M4 32-bit processor with FPU, 64 MHz
  • 215 EEMBC CoreMark score running from flash memory
  • 58 µA/MHz running from flash memory
  • 51.6 µA/MHz running from RAM
  • Data watchpoint and trace (DWT), embedded trace macrocell (ETM), and instrumentation trace macrocell (ITM)
  • Serial wire debug (SWD)
  • Trace port
• Flexible power management
  • 1.7 V?3.6 V supply voltage range
  • Fully automatic LDO and DC/DC regulator system
  • Fast wake-up using 64 MHz internal oscillator
  • 0.3 µA at 3 V in System OFF mode
  • 0.7 µA at 3 V in System OFF mode with full 64 kB RAM retention
  • 1.9 µA at 3 V in System ON mode, no RAM retention, wake on RTC
• Memory
  • 512 kB flash/64 kB RAM
  • 256 kB flash/32 kB RAM
• Nordic SoftDevice ready
• Support for concurrent multi-protocol
• Type 2 near field communication (NFC-A) tag with wakeup-on-field and touch-to-pair capabilities
• 12-bit, 200 ksps ADC - 8 configurable channels with programmable gain
• 64 level comparator
• 15 level low power comparator with wakeup from System OFF mode
• Temperature sensor
• 32 general purpose I/O pins
• 3x 4-channel pulse width modulator (PWM) unit with EasyDMA
• Digital microphone interface (PDM)
• 5x 32-bit timer with counter mode
• Up to 3x SPI master/slave with EasyDMA
• Up to 2x I2C compatible 2-wire master/slave
• I2S with EasyDMA
• UART (CTS/RTS) with EasyDMA
• Programmable peripheral interconnect (PPI)
• Quadrature decoder (QDEC)
• AES HW encryption with EasyDMA
• Autonomous peripheral operation without CPU intervention using PPI and EasyDMA
• 3x real-time counter (RTC)
• Single crystal operation

You can also cheek our "Dokumente" for more information