BEMP=0, NRDY=0, VALID=0, VBINT=0, SOFR=0, CTSQ=000, RESM=0, DVST=0, VBSTS=0, BRDY=0, CTRT=0, DVSQ=Others
Interrupt Status Register 0
| CTSQ | Control Transfer Stage 0 (000): Idle or setup stage 1 (001): Control read data stage 2 (010): Control read status stage 3 (011): Control write data stage 4 (100): Control write status stage 5 (101): Control write (no data) status stage 6 (110): Control transfer sequence error |
| VALID | USB Request Reception 0 (0): Setup packet not received 1 (1): Setup packet received |
| DVSQ | Device State 0 (000): Powered state 0 (Others): Suspend state 1 (001): Default state 2 (010): Address state 3 (011): Configured state |
| VBSTS | VBUS Input Status 0 (0): USB_VBUS pin is low 1 (1): USB_VBUS pin is high |
| BRDY | Buffer Ready Interrupt Status 0 (0): No BRDY interrupt occurred 1 (1): BRDY interrupt occurred |
| NRDY | Buffer Not Ready Interrupt Status 0 (0): No NRDY interrupt occurred 1 (1): NRDY interrupt occurred |
| BEMP | Buffer Empty Interrupt Status 0 (0): No BEMP interrupt occurred 1 (1): BEMP interrupt occurred |
| CTRT | Control Transfer Stage Transition Interrupt Status 0 (0): No control transfer stage transition interrupt occurred 1 (1): Control transfer stage transition interrupt occurred |
| DVST | Device State Transition Interrupt Status 0 (0): No device state transition interrupt occurred 1 (1): Device state transition interrupt occurred |
| SOFR | Frame Number Refresh Interrupt Status 0 (0): No SOF interrupt occurred 1 (1): SOF interrupt occurred |
| RESM | Resume Interrupt Status 0 (0): No resume interrupt occurred 1 (1): Resume interrupt occurred |
| VBINT | VBUS Interrupt Status 0 (0): No VBUS interrupt occurred 1 (1): VBUS interrupt occurred |