The development board is made with reference to the N32G455 official development board and N32G455 hardware design manual. It is powered by 3.3V LDO, equipped with USB and RTC small battery. It can be prototyped for free by Jialichuang, and its functions have been verified by board testing. In order to reduce costs, the SWD interface does not use the onboard NS Link like the official development board. Instead, it is directly led out to facilitate the use of existing debuggers such as DAP Link and Jlink (I have tested both of these).
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