OTGFS device control IN endpoint 0 control register (OTGFS_DIEPCTL0)
| MPS | Maximum packet size |
| USBACEPT | USB active endpoint |
| NAKSTS | NAK status |
| EPTYPE | Endpoint type |
| STALL | STALL handshake |
| TXFNUM | TxFIFO number |
| CNAK | Clear NAK |
| SNAK | Set NAK |
| EPTDIS | Endpoint disable |
| EPTENA | Endpoint enable |