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Adafruit Feather M4 Express
AdafruitATSAMD51J19A
The Adafruit Feather M4 Express is a fast, smart, and powerful microcontroller board featuring an ATSAMD51J19A chip with 120MHz Cortex M4 core, 512KB flash, and 192KB RAM.
In stock
Specifications
8- Operating Voltage
- 3.3V logic level, 5V tolerant on digital IO pins (with external pull-up resistor) and USB port.
- Clock Speed
- 120 MHz
- Flash
- 512 KB KB
- Ram
- 192 KB KB
- Gpio Count
- 21
- Dimensions
- 2.0" x 0.9" x 0.28" inches
- Connectivity
- USB native support, I2C, SPI, UART
- Usb
- Yes (native)
Pinout
25| Pin | Name | Functions | Notes |
|---|---|---|---|
| GND | GND | POWER | Common ground for all power and logic |
| BAT | BAT | POWER | Positive voltage to/from the JST jack for optional LiPo battery |
| USB | USB | POWER | Positive voltage to/from the micro USB jack if connected |
| EN | EN | POWER | 3.3V regulator's enable pin, pulled up, connect to ground to disable |
| 3V | 3V | POWER | Output from the 3.3V regulator, can supply 500mA peak |
| SDA | SDA | I2C | I2C data pin, GPIO #21, PWM capable |
| SCL | SCL | I2C | I2C clock pin, GPIO #22, PWM capable |
| #0 / RX | RX | GPIOPWM | Receive (input) pin for Serial1, also PWM output |
| #1 / TX | TX | GPIOPWM | Transmit (output) pin for Serial1, also PWM output |
| #4 | GPIO #4 | GPIOPWM | PWM capable |
| #5 | GPIO #5 | GPIOPWM | PWM capable |
| #6 | GPIO #6 | GPIOPWM | PWM capable |
| #9 | GPIO #9 | GPIOPWM | PWM capable |
| #10 | GPIO #10 | GPIOPWM | PWM capable |
| #11 | GPIO #11 | GPIOPWM | PWM capable, connected to red LED next to USB jack |
| A0 | A0 | ADCPWM | Analog input A0, also analog output due to DAC |
| A1 | A1 | ADCPWM | Analog input A1, also analog output due to DAC, independent of A0 |
| A2 | A2 | GPIOPWM | Analog input and digital I/O, can do PWM (not available in CircuitPython) |
| A3 | A3 | GPIOPWM | Analog input and digital I/O, can do PWM (not available in CircuitPython) |
| A4 | A4 | GPIOPWM | Analog input and digital I/O, can do PWM (not available in CircuitPython) |
| A5 | A5 | GPIOPWM | Analog input and digital I/O, can do PWM (not available in CircuitPython) |
| SCK | SCK | SPI | Hardware SPI pin, also GPIO #25 |
| MOSI | MOSI | SPI | Hardware SPI pin, also GPIO #24 |
| MISO | MISO | SPI | Hardware SPI pin, also GPIO #23 |
| CS | CS | SPI | Chip select for hardware SPI connections |
Interactive pinout
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ATSAMD51J19A
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