USB2_PLL_REG0
u2o_clear(base, USB2_PLL_REG0, (USB2_PLL_FBDIV_MASK_MMP3
u2o_set(base, USB2_PLL_REG0,
u2o_clear(base, USB2_PLL_REG0, USB2_PLL_REFDIV_MASK_MMP3_B0