This Feather has lots of goodies:
- STM32F405 Cortex M4 with FPU and 1MB Flash, 168MHz speed
- 192KB RAM total - 128 KB RAM for general usage + 64 KB program-only/cache RAM
- 3.3V logic, but almost all pins are 5V compliant!
- USB C power and data - our first USB C Feather!
- LiPo connector and charger
- SD socket on the bottom, connected to SDIO port
- 2 MB SPI Flash chip
- Built in NeoPixel indicator
- I2C, UART, GPIO, ADCs, DACs
- Qwiic/STEMMA-QT connector for fast I2C connectivity
- We use the built-in USB DFU bootloader to load firmware. It does not come with a UF2 bootloader.