STC32G12K128/STC8H8K64U development board

 STC32G12K128/STC8H8K64U Development Board Development Board

- The main control chip used in the STC32G12K128/STC8H8K64U development board: STC32G12K128-LQFP64/STC8H8K64U-LQFP64 is fully compatible, with automatic download circuit, all IO ports are led out, with a reset button, and provides a Micro USB interface in HID mode.

- When selecting USB download, switch the short-circuit position between P32 and GND through the jumper cap. 

> Note: The USB download mode is only for functional verification reference. For actual board testing, this part of the circuit function cannot be used as a regular debugging and download port.
,STC-ISP can recognize the HID interface when it is inserted into the USB interface. If there is no downloading and detection operation behavior, it will automatically exit the HID mode after a while. Maybe this part of the circuit needs to be further improved. The HID mode, from the operator's point of view It is quite troublesome to see. For more related hardware USB direct ISP downloads, please refer to the official manual of the STC8H series.

- The `TL431` is used, and the `2.5V` generated is used as the reference reference voltage. The actual voltage value of the circuit board produced during the power-on test is: `2.47V`.

### Bypass capacitor description

- Do not use a filter capacitor exceeding 10uf for the main control chip power supply, otherwise the STC-ISP automatic download circuit will easily fail.

#### STC-ISP tool detection information