楼主你好,关于不使用的NVCC_***,这里你要查看数据手册IMX6SDLCEC.pdf,在第26页最下面有说明的,All digital I/O supplies (NVCC_xxxx) must be powered under normal conditions whether the associated I/O pins are in use or not and associated IO pins need to have a Pull-up or Pull-down resistor applied to limit any floating gate current.