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Feather 32U4 Fona
AdafruitATmega32u4
A portable microcontroller board with built-in USB and battery charging support for cellular communication.
In stock
Specifications
9- Operating Voltage
- 3.3V logic, 500mAh peak current output from the 3.3V regulator, VBAT powers the cellular module directly from a LiPo battery (4.2V max) and can handle high current spikes during data transmission.
- Logic Level
- 3.3V logic
- Clock Speed
- 8 MHz
- Flash
- 32K bytes
- Ram
- 2K bytes
- Gpio Count
- 20
- Dimensions
- 2.4" x 0.9" x 0.28" inches
- Connectivity
- USB, I2C, SPI, Serial1 (TX/RX), PWM
- Usb
- Micro USB for charging and programming
Pinout
25| Pin | Name | Functions | Notes |
|---|---|---|---|
| GND | GND | POWER | Common ground for all power and logic |
| BAT | BAT | — | Positive voltage to/from the JST jack for the optional LiPo battery |
| USB | USB | POWER | Positive voltage to/from the micro USB jack if connected |
| EN | EN | — | 3.3V regulator's enable pin, pulled up by default |
| 3V | 3V | POWER | Output from the 3.3V regulator, can supply 500mA peak |
| 0 / RX | GPIO #0 | GPIO | Receive (input) pin for Serial1 and Interrupt #2 |
| 1 / TX | GPIO #1 | GPIO | Transmit (output) pin for Serial1 and Interrupt #3 |
| 2 / SDA | GPIO #2 | I2C | I2C data pin, no pull-up by default |
| 3 / SCL | GPIO #3 | I2C | I2C clock pin, no pull-up by default |
| 5 | GPIO #5 | PWMGPIO | Can also do PWM output and is connected to the FONA's DTR pin if you want to use it for powersaving functionality, which is not enabled by default |
| 6 | GPIO #6 | PWMADC | Can also do PWM output and analog input A7 |
| 9 | GPIO #9 | GPIO | Connected to FONA RXD |
| 10 | GPIO #10 | PWMADC | Analog input A10 and can do PWM output |
| 11 | GPIO #11 | PWM | Can do PWM output |
| 12 | GPIO #12 | PWMADC | Analog input A11 and can do PWM output |
| 13 | GPIO #13 | PWM | Can do PWM output and is connected to the red LED next to the USB jack |
| A0 | A0 | ADC | Analog input as well as digital I/O pin |
| A1 | A1 | ADC | Analog input as well as digital I/O pin |
| A2 | A2 | ADC | Analog input as well as digital I/O pin |
| A3 | A3 | ADC | Analog input as well as digital I/O pin |
| A4 | A4 | ADC | Analog input as well as digital I/O pin |
| A5 | A5 | ADC | Analog input as well as digital I/O pin |
| SCK | SCK | SPI | Hardware SPI clock pin |
| MOSI | MOSI | SPI | Hardware SPI MOSI pin |
| MISO | MISO | SPI | Hardware SPI MISO pin |
Interactive pinout
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ATmega32u4
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