barley V4F processor, the highest system frequency is 144MHz Support single cycle multiplication and hardware division, support hardware floating point operation (FPU) 64KB , 256KB Flash Power supply voltage: 2.5/3.3V, power supply for GPIO unit Multiple low power consumption modes: sleep, stop, standby Power-on/off reset, programmable voltage detector 2 groups of 18-way general-purpose DMA 4 sets of operational amplifier comparators 1 random number generator TRNG 2 sets of 12-bit DAC conversion 2 units, 16 channels, 12-bit ADC conversion, 16 touch keys, TouchKey, 10 groups of USB2.0 full-speed OTG interface USB2.0 high-speed host/device interface (480Mbps built-in PHY) 3 USART interfaces and 5 UART interfaces 2 CAN interfaces (2.0B active) SDI0 interface, FSMC interface, digital image interface 2 groups of 11C interfaces, 3 groups of SPI interfaces, 2 groups of 1IS interfaces Gigabit Ethernet controller ETH (built-in 10M PHY) 80 1/0 ports, can be mapped to 16 external interrupt calculation units, 96-bit chip unique ID Serial 2-wire debug interface Due to different production batches, the appearance and color of the product may be different, which does not affect use. Colour:As Shown Material:PCB Package Contents: 1 * Development board 1 set * pin header Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.