PCTRL_PERI_CTRL3_MSK_START
val = USB_TCXO_EN << PCTRL_PERI_CTRL3_MSK_START;
val = USB_TCXO_EN | (USB_TCXO_EN << PCTRL_PERI_CTRL3_MSK_START);
(USB_TCXO_EN << PCTRL_PERI_CTRL3_MSK_START));
USB_TCXO_EN << PCTRL_PERI_CTRL3_MSK_START);