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Feather nRF52840 Express
AdafruitnRF52840
This Adafruit Feather board features the nRF52840, offering Bluetooth Low Energy and native USB. It's an all-in-one solution for Arduino and CircuitPython, including battery charging capabilities.
In stock
Specifications
14- Processor Architecture
- ARM Cortex M4F
- Clock Speed
- 64 MHz
- Flash
- 1 MB
- Ram
- 256 KB
- Qspi Flash
- 2 MB
- Operating Voltage
- 1.7-3.3 V
- Logic Level
- 3.3 V
- Gpio Count
- 21
- Adc Count
- 6
- Adc Resolution
- 12 bit
- Pwm Count
- 12
- Connectivity
- Bluetooth Low Energy 2.4GHz
- Usb
- Native USB (CDC, HID, MSC, MIDI)
- Dimensions
- 51x23x7.2 mm
Pinout
16| Pin | Name | Functions | Notes |
|---|---|---|---|
| D2 | D2 | GPIONFC | Default GPIO, requires full chip erase for NFC functionality |
| 3V | 3V | POWER | 3.3V regulated output |
| Bat | Bat | POWER | LiPo battery input, nominally ~3.5-4.2V |
| En | En | GPIO | Connect to GND to disable 3.3V regulator |
| USB | USB | POWER | USB 5V input, nominally ~4.5-5.2V |
| A0 | A0 | GPIOADCPWM | |
| A1 | A1 | GPIOADCPWM | |
| A2 | A2 | GPIOADCPWM | |
| A3 | A3 | GPIOADCPWM | |
| A4 | A4 | GPIOADCPWM | |
| A5 | A5 | GPIOADCPWM | |
| A7 | AREF | GPIO | External analog reference for comparator, not for ADC |
| D7 | SWITCH | GPIO | User switch, also forces bootloader mode on reset |
| D3 | LED_RED | GPIO | Red LED, status indicator in bootloader mode |
| CONN | LED_BLUE | GPIO | Blue LED, typically for BLE connection status |
| — | PIN_NEOPIXEL | GPIO | RGB LED for colorful feedback, connected to P0.16 |
Interactive pinout
Highlight:
nRF52840
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