STC8H3K coreboard QFP48

Introduction: STC8H3K chip core board, packaged in QFP48, is used for microcontroller circuit production and simple verification, imitating the widely used STM32F103 core board

1. The pin header width complies with the PDIP40 package and can be inserted into a breadboard
2. Onboard RT9013-3.3V step-down LDO, 2.5V TL431 voltage reference, and an external crystal oscillator circuit is reserved (the chip only supports 4MHz-36MHz)

3. P5.0, P5.1 pins are connected to the key switch on the board (with RC hardware debounce), P5.4 is connected to the reset circuit, P5.2, P5.3, P5.5 are connected to the LED on the board
4. P4 .7 pin is left floating and not lead out; P1.6 and P1.7 are used for external crystal oscillator; the other pins are lead out normally

5. AVCC is fixedly connected to VCC, VREF(+) is fixedly connected to the TL431 voltage reference 2.5V, and the analog power supply and ground are connected to VCC and GND at a single point (the magnetic beads are not actually used in the schematic diagram and are only used to divide the electrical network)

New pit:

STC8H series 8051 microcontroller firmware library (imitates the STM32 firmware library calling method)

https://github.com/ccapen/STC8H_Periph_Lib.git 

Long-term updates planned