Product descriptionSTM32F401CCU6 V3.0 Lead-free 84Mhz 64KB RAM 256KB ROM

STM32F411CEU6V 3.0 Gold-plated100Mhz 128KB RAM 512KB ROM

1.25MHZ high speed crystal oscillator&32.768Khz6PFlow speed crystal oscillator2.Flash pads are reserved， providing USBD is k&&FAT FFS routines3.Jumper cap can be used directly without installation.BOOT0 internal 10K resistance pull-down4.Factory has burned breathing lamp&&USB CDC test procedures.5.Provide available Micro Python firmware，configuration files6.Adjust the direction of the jumping cap if it can not be installed.Because the jump cap is wide on one side and narrow on the other.7.V 1.3 board with 3 buttons：reset key， BOOT0 key and user button.

Why choose 401?In the F401 series， the chip is the cheapest，even cheaper than some F1， and crushed F1 on the main frequency， and has a floatingpoint arithmetic module， the lO port contains all the basic functions.Therefore， it is possible to provide a learning platform with avery high cost performance for beginners. In practical applications， it is not because the computing power is insufficient， and the lO port is incomplete and hinders development.

Product FeaturesBOOT settings are changed from jumper to button to reduce the installation trouble by pressingBOO TO and NRST， releasing NRST to access serialport download， DFU download， providing ST official multi-in-one STM 32 Cube Programmer burning software.

The GND is changed to 5V B9 5V GND，which can directly connect a small steering gear without additional wiring and reducedevelopment time.

Previous versions of the sole can not be welded to the foot， no impact.

Instructions of use

Howto enter ISP mode?

Method1：In the power-on state， press and hold the BOOTO key and there setkey， then release there setkey， and release the BOOT0 key after 0.5 seconds，Method2：Inthepower-offstate， press and hold the BOOTO key， and release the BOOTO key 0.5S after power-on.

DFU mode：Just connect the computer with a datacable， If you can not identify the problem，you can properly heat the chip(25o C) and then enter the lSP mode

Serialport mode：Use USB to serialport to connect the PA9 and PA10 of the core board.

Software：STM32CubeProg.