MiniProg3不起作用 - Cypress技术论坛 - 电子技术论坛 - 广 . . . The power supply of backup domain maybe actually not switched to super cap even though sw7 switched correctly, because VDDD is always supplied as long as Miniprog3 supplies power to the board If VDDD is available, backup power switch will always selects VDDD as power source