PLLCTRL_PWRDWN_MASK
return !(reg & (PLLCTRL_RESET_MASK | PLLCTRL_PWRDWN_MASK));
reg &= ~(PLLCTRL_RESET_MASK | PLLCTRL_PWRDWN_MASK);
reg |= PLLCTRL_RESET_MASK | PLLCTRL_PWRDWN_MASK;