NUCLEO STM32 F401RE

NUCLEO STM32 F401RE















The STM32 Nucleo boards are the official Development Boards form STMicroelectronics.
It features the ARM Cortex M4 32-bit STM32F401RET6 microcontroller which is in LQFP64 package.
The Boards pinout is similar to Arduino UNO and has many other additional pins to expand performance.
This board also comes with an integrated ST-LINK/V2-1 programmer and debugger; hence it is very easy to get started with this board.

As shown in the image above there are three LEDs, where LD1 is for indicating USB communication, LD2 is programmable LED and LD3 indicates power. Similarly there are two push buttons where one is user programmable and the other is to reset the Microcontroller. The Board operates with 3.3V supply but a wide voltage range of 7-12V can be provided to the VIN pin since it has an on-board voltage regulator.

Nucleo-F401RE Pin Configuration

The STM32 Nucleo board pinout is shown above. As you can see there are two sets of pins.
The pin one resembles the Arduino UNO and the blue one is the STM32 style (Morpho).
The arduino like pins are female connector pins which exactly match the order and position of Arduino UNO pins and hence any Arduino shield can be used with these development boards.

The Arduino pins are split into category CN5, CN6, CN8 and CN9. Each category pins can be tabulated as follows





Apart from the Arduino pins the board also has 76 (38+38) GPIO pins as male headers on either side of the board as shown above.
These pins are classified into CN7 and CN10 with each having 38 Pins. They comprise of GPIO pins, Analog Pins, Timer Pins and Power pins.
The name of the pins can be found in the image above. They are also categorized with the table below






STM32 Nucleo-F401RE Technical Specifications


Microcontroller         STM32F401RET6 (32-bit)

Architecture              ARM Cortex M4 CPU with FPU

Power consumption      2.4uA at standby without RTC

CPU Frequency          84 MHz

Crystal Oscillator Range      4 to 26 MHz

MCU Operating Voltage (VDD)          1.7V to 3.6V

Board Operating Voltage (VIN)         7V to 15V

Flash Memory       512KB

SRAM        96 KB

GPIO Pins     50

ADC      12-bit 16Channel

RTC       In-built 32kHz with calibration

Timers     16-bit (6)      32-bit (2)

Watchdog Timers     2

USART/UART Communication    4

I2C Communication    3

SPI Communication    3

USB2.0 Support    Yes

Internal Crystal Oscillator    Yes, 16MHz

On Board Debugger   Yes, Serial Wire and JTAG