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ItsyBitsy M4 Express
AdafruitATSAMD51G19A
The Adafruit ItsyBitsy M4 Express is a compact, powerful microcontroller board featuring an ATSAMD51 Cortex M4 processor running at 120 MHz. It offers extensive GPIO, ADC, DAC, and PWM capabilities, plus 2MB of SPI flash for storage.
In stock
Specifications
15- Clock Speed
- 120 MHz
- Flash Memory
- 512 KB
- Ram Memory
- 192 KB
- Spi Flash Memory
- 2 MB
- Logic Level
- 3.3 V
- Operating Voltage
- 3.3 V
- Gpio Count
- 23
- Adc Count
- 7
- Dac Count
- 2
- Pwm Count
- 18
- Dimensions
- 1.4 x 0.7 inch
- Usb Interface
- Native USB
- Supported Ides
- Arduino IDE, CircuitPython, MakeCode
- Peripherals
- I2C, SPI, UART, Parallel Capture Controller
- Bootloader
- UF2
Pinout
35| Pin | Name | Functions | Notes |
|---|---|---|---|
| — | BAT | POWER | Battery input, 3.5V to 6VDC |
| — | GND | GND | |
| — | USB | POWER | 5V USB power output |
| — | 3V | POWER | Regulated 3.3V output, 500mA |
| — | Vhi | POWER | Higher of BAT/USB voltage (approx 5V from USB, 3.5-6V from BAT), high-current, unregulated |
| — | EN | GPIO | Regulator enable, shuts off power when on battery only |
| 0 | RX | GPIOUARTPWM | GPIO #0, Serial1 receive |
| 1 | TX | GPIOUARTPWM | GPIO #1, Serial1 transmit |
| — | SDA | GPIOI2CPWM | I2C data, may need pull-up |
| — | SCL | GPIOI2CPWM | I2C clock, may need pull-up |
| 5 | D5 | GPIOPWM | Output-only, level-shifted to Vhi for NeoPixels |
| 7 | D7 | GPIOPWM | |
| 9 | D9 | GPIOPWM | |
| 10 | D10 | GPIOPWM | |
| 11 | D11 | GPIOPWM | |
| 12 | D12 | GPIOPWM | |
| 13 | D13 | GPIOPWM | Connected to red LED |
| — | A0 | GPIOADCDAC | Analog input A0, 12-bit analog output DAC |
| — | A1 | GPIOADCDAC | Analog input A1, 12-bit analog output DAC |
| — | A2 | GPIOADC | |
| — | A3 | GPIOADCPWM | |
| — | A4 | GPIOADCPWM | |
| — | A5 | GPIOADC | |
| — | SCK | GPIOSPIPWM | Hardware SPI clock |
| — | MOSI | GPIOSPIPWM | Hardware SPI Master Out Slave In |
| — | MISO | GPIOSPI | Hardware SPI Master In Slave Out |
| 2 | D2 | GPIOADCPWM | Analog input A6 |
| 3 | D3 | GPIO | |
| 4 | D4 | GPIOPWM | |
| — | SWCLK | GPIO | Debug interface clock |
| — | SWDIO | GPIO | Debug interface data |
| — | RST | GPIO | Reset pin, tie to ground to reset or double-click for bootloader |
| — | ARef | GPIO | Analog reference pin, max 3.3V |
| 6 | D6 | GPIO | DotStar LED clock (Arduino) |
| 8 | D8 | GPIO | DotStar LED data (Arduino) |
Interactive pinout
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ATSAMD51G19A
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