
Adafruit Feather STM32F405 Express
Microcontroller Board
High-speed Feather-form-factor dev board with STM32F405 ARM Cortex-M4F @ 168MHz, 1MB Flash, 192KB RAM, 2MB SPI Flash, USB-C, STEMMA QT, SD card socket, and LiPo charging. Adafruit's fastest CircuitPyt
ARM Cortex-M4F @ 168MHz (STM32F405)192KB SRAM1MB + 2MB SPI FlashWiFi falseBLE falseZigbee falseEthernet false
~$25View

Adafruit Metro M4 Express (ATSAMD51)
Dev Board
Arduino-compatible development board with ATSAMD51 ARM Cortex-M4F at 120 MHz, 512KB flash, 192KB RAM, 2MB QSPI flash, dual 1 MSPS DACs, crypto engine, NeoPixel, and native USB. CircuitPython and Ardui
ATSAMD51J19 ARM Cortex-M4F @ 120 MHz192KB SRAM512KB + 2MB QSPI Flash
~$28View
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