| Microcontroller |
nRF52840 |
| Operating Voltage |
3.3V |
| Input Voltage (limit) |
21V |
| DC Current per I/O Pin |
15mA |
| Clock Speed |
64MHz |
| CPU Flash Memory |
1MB (nRF52840) |
| SRAM |
256KB (nRF52840) |
| EEPROM |
none |
| Digital Input / Output Pins |
14 |
| PWM Pins |
all digital pins |
| UART |
1 |
| SPI |
1 |
| I2C |
1 |
| Analog Input Pins |
8 (ADC 12 bit 200 k samples) |
| Analog Output Pins |
Only through PWM (no DAC) |
| External Interrupts |
all digital pins |
| LED_BUILTIN |
13 |
| USB |
Native in the nRF52840 Processor |
| IMU |
LSM9DS1 |
| Microphone |
MP34DT05 |
| Gesture, light, proximity sensor |
APDS9960 |
| Barometric pressure sensor |
LPS22HB |
| Temperature, humidity sensor |
HTS221 |