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