SPECIFICATIONS

Regarding the product status

Finished product: All components have been welded together, with pin headers, power cords, and heat dissipation modules (if any)

Finished product (excluding CPU): All components except the main chip (FPGA, DSP, ARM, etc.) have been soldered, with pin headers and power cords, but without a heat dissipation module

Empty board + components (excluding CPU) : One printed circuit board and all components except the main chip (FPGA, DSP, ARM, etc.) (components are provided and need to be soldered by the customer themselves), with pin headers, no power cord, no heat dissipation module

Empty board: Only one printed circuit board, without any components or accessories

Regarding the materials
1)All the products sold in our store are various core boards, targeted at customers with certain development capabilities. There are no other introductory materials or materials available
The content mainly includes design drawings and test codes (there is an introduction to the complimentary materials below the webpage).
2)Customers who need to select a model should refer to the product information introduction at the bottom of the webpage. In principle, no materials will be provided before placing an order, and they will be sent after shipment
Download the link from Baidu Netdisk by yourself
3) If you do not receive the link to the materials for a long time after placing an order, please contact customer service proactively

Regarding after-sales service
1)Each board will be tested before shipment and, in principle, there will be no quality issues.
2) Please ensure that the goods are in good condition before receiving them. To protect our rights, all products will be photographed and saved before shipment.
3) The products sold are not eligible for return.

The onboard chip: STM32F4291GT6 / STM32F767IGT6 / STM32H743IIT6
Development board size: 59.5mm*74mm.
Power supply method: 5V 500ma pin header /miniUSB socket.
PCB lamination: Two layers
Download method: JTAG (Jlink V2 V8 V9)/Serial port.
Development environment: Keil/IAR.
Complimentary accessory :miniUSB power cord
Development board status: Finished product/welded and debugged, ready for shipment.
Development board circuit
1.The complete power supply system only requires an external input of 5V to operate.
2.5032 package 25MHz crystal oscillator without continuous supply
STM32F4291GT6:180MHz
STM32F7671GT6:216MHz
STM32H743IIT6:400MHz
3. A reset button provides manual reset 
4. One debugging LED for convenient software debugging.
External interface of the development board
1.Anti-reverse insertion 20P/2.54mm standard JATG socket
2.6 rows of 23*2.54mm standard pitch pin headers (all IO ports leading out of the chip)

Complimentary materials
1. Development board drawing: Developed by AltiumDesiger 09.
Schematic source file, PCB diagram source file (traces deleted), PDF format schematic PCB diagram.
2. Software development :MDK5
3. Routines. Test code