STC8A8K64D4 development board

STC8A8K64D4 development board

Based on STC8A8K64D4-45I-LQFP64 main control chip design, with automatic serial port download function, all IO ports are doubled, with 2.5V ADC reference voltage based on tl431, reset circuit and external crystal oscillator circuit are optional.

- STC-ISP detects the development board hardware:

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Bypass capacitor description

• Do not place a filter capacitor larger than 10uf or above on the main control chip power supply, otherwise the automatic download circuit will fail. Because STC8A8K64D4the power consumption is lower than other series of STC microcontrollers, a capacitor that is too large will result in the inability to achieve a hard reset of the microcontroller during automatic downloading. Recommended value 680nf-1uf. I spent a long time looking for this place during the debugging process before I discovered this problem.
• 采用的是CH340G，如果使用CH340C，可以省掉晶振部分的电路以及元器件。CH340G电路兼容CH340C，如果焊接CH340C就不用焊接晶振部分的相关器件。