====== STM32F401 Nucleo Cortex-M4 Developer Board ======

==== Microcontroller features ====
   * STM32F401RET6 in LQFP64 package
   * ARM®32-bit Cortex®-M4 CPU with FPU
   * 84 MHz max CPU frequency
   * VDD from 1.7 V to 3.6 V
   * 512 KB Flash
   * 96 KB SRAM
   * GPIO (50) with external interrupt capability
   * 12-bit ADC with 16 channels
   * RTC
   * Advanced-control Timer
   * General Purpose Timers (7)
   * Watchdog Timers (2)
   * USART/UART (4)
   * I2C (3)
   * SPI (3)
   * SDIO
   * USB 2.0 OTG FS

==== Board features ====

 * Two types of extension resources
   * Arduino Uno Revision 3 connectivity
   * STMicroelectronics Morpho extension pin headers for full access to all STM32 I/Os 
 * On-board ST-LINK/V2-1 debugger/programmer with SWD connector
   * Selection-mode switch to use the kit as a standalone ST-LINK/V2-1 
 * Flexible board power supply
   * USB VBUS or external source (3.3 V, 5 V, 7 - 12 V)
   * Power management access point 
 * User LED (LD2)
 * Two push buttons: USER and RESET
 * USB re-enumeration capability: three different interfaces supported on USB
   * Virtual Com port
   * Mass storage (USB Disk drive) for drag'n'drop programming
   * Debug port 

==== Information ====

Only the labels written in blue/white or green/white (i.e. PA_4, PB_5, A0, D14, LED1...) must be used in your code. The other labels are given as information (alternate-functions, power pins, ...). You can also use these additional labels:

           SERIAL_TX=PA_2  I2C_SCL=PB_8  SPI_MOSI=PA_7  PWM_OUT=PB_3
           SERIAL_RX=PA_3  I2C_SDA=PB_9  SPI_MISO=PA_6
                                         SPI_SCK =PA_5
                                         SPI_CS  =PB_6
==== Pinout ====
{{.stm32f401-pinout-arduino.jpg?direct&800|Pinout of Arduino Headers}}
{{.stm32f401-pinout-morpho.png?direct&800|Pinout of Morpho Headers}}