• STM32F411RET6 in LQFP64 package
• ARM®32-bit Cortex®-M4 CPU with FPU
• 100 MHz max CPU frequency
• VDD from 1.7 V to 3.6 V
• 512 KB Flash
• 128 KB SRAM
• GPIO (50) with external interrupt capability
• 12-bit ADC with 16 channels
• RTC
• Timers (8)
• I2C (3)
• USART (3)
• SPI (5)
• USB OTG Full Speed
• SDIO

The Arduino headers are almost compatible, the main difference being that D14/D15 are not the same I/O as AD4/AD5 without board adjustments.

Arduino compatible headers

                 PB8  D15 I2C1 SCL
                 PB9  D14 I2C1 SDA
                      AVDD
NC                    GND
IOREF        LD2 PA5  D13 SPI2 SCK
RESET            PA6  D12 SPI2 MISO     
3V3              PA7  D11 SPI2 MOSI
5V               PB6  D10 SPI2 CS
GND              PC7  D9
GND              PA9  D8  USART1 TX
VIN
                 PA8  D7
                 PB10 D6
AD0 PA0          PB4  D5
AD1 PA1          PB5  D4
AD2 PA4          PB3  D3
AD3 PB0          PA10 D2  USART1 RX
AD4 PC1          PA2  D1  USART2 TX
AD5 PC0          PA3  D0  USART2 RX

MCO 8000000  X1 8MHz ST-LINK/V2
HSE MC0      X3 NOT FITTED USES MC0
HSI 16000000
LSE 32768    X2 32.768K
LSI 32768

Product page

Data brief

User manual

MBED overview

MCU Data-sheet

MCU Errata

MCU Reference Manual

Using the STM32 RTC