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3.3v boxes mark pins that are not 5v tolerant (they only take inputs from. The ST Nucleo-F401RE board includes an on-board ST-LINK V2 programmer. Pinout Purple boxes show pins that are used for other functionality on the board. Waveshare STM32 Kit NUCLEO-F401RE Nucleo STM32 Development Board STM32F401RE Integrate ST-LINK/V2-1 Debugger/Programmer Technical Details Additional. USART2 via STLink/USB or D0(RX)/D1(TX) and USART6 on PA12(RX)/PA11(TX) Shop STMicroelectronics NUCLEO-F401RE Model STM32 Nucleo-64 Development Board with STM32F401RE MCU, Supports Arduino and ST Morpho Connectivity online at. The Nucleo-F401RE is a board from ST's Nucleo family supporting a ARM Cortex-M4 STM32F401RE microcontroller with 96KiB of RAM and 512KiB of Flash.ฤก1 (2x watchdog, 1 SysTick, 6x 16-bit, 2x 32-bit )