Interrupt Enable Flag
| BUS_IE | 1/0: Enable/disable BUS event interrupt. |
| USB_IE | 1/0: Enable/disable USB event interrupt. |
| FLDET_IE | 1/0: Enable/disable Floating detect Interrupt |
| WAKEUP_IE | 1/0: Enable/disable Wakeup Interrupt. |
| WAKEUP_EN | 1/0: Enable/Disable USB wakeup function |
| INNAK_EN | 1 = The NAK status is updated into the endpoint status register, USB_EPSTS, when it is set to 1 and there is NAK response in IN token. It also enable the interrupt event when the device responds NAK after receiving IN token. 0 = The NAK status doesn’t be updated into the endpoint status register when it was set to 0. It also disable the interrupt event when device responds NAK after receiving IN token |