The STM32F401 ‘Black pill’ development board is an updated version of the original F103 based black pill. This newer version features a more powerful Core-M4F based ARM CPU which brings with it a number of enhanced features, including more flash, SRAM memory, a Floating Point Unit, and an increased number of peripherals, including built in USB type-C OTG support. However, possibly the most amazing feature of this development board is the price. When compared to Atmel based Arduino development boards this little development board boasts a very impressive array of features for a fraction of the cost.
Features:
STM32F411CEU6 (100Mhz) with 512KB FLASH & 128KB RAM
Onboard LDO for 5V to 3.3V DC conversion
2x 20 Pin Single Line Header which gives access to all the IOs. The board comes with unsoldered header connectors.
Header for SWD Programming Interface
Switches for Reset, Boot Mode, User
LED for Power and another connected on GPIO(C13)
25MHZ high speed crystal, 32.768Khz low speed crystal
BOOT0 and NRST, releasing NRST to access serial port download, DFU download, using ST multi-in-one STM32 Cube Programmer burning software.
Option to solder SPI Memory on the bottom side of the board.
USB-C type Connector
Interface Description:
SWD interface: support simulation, download and debugging
Micro USB interface: power supply and USB communication, download is not supported
USART1 interface: USART1 can be used to download programs, or use USART1 for communication
MCU pin interface: lead out all I/O port pins for easy connection with peripherals
5V and 3.3V power input and output interface: often used for external power supply, or common grounding treatment with other modules
Other Equipment Description:
Power indicator (PWR): The status of the power indicator, which can determine whether the power is stable
User LED (PC13): Convenient for I/O output testing or indicating program operation
Start to jump to select programming mode: (1, user flash memory 2, SRAM 3, system memory)
Reset button: reset the chip for the user program
8M crystal oscillator: the frequency can be set to make the system main frequency 72MHz
32.768KHz crystal oscillator: can be used for built-in RTC or calibration
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