NAKSTS=B_0x0, EPTYP=B_0x0, DPID=B_0x0
OTG device IN endpoint 3 control register [alternate]
| MPSIZ | Maximum packet size |
| USBAEP | USB active endpoint |
| DPID | Endpoint data PID 0 (B_0x0): DATA0 1 (B_0x1): DATA1 |
| NAKSTS | NAK status 0 (B_0x0): The core is transmitting non-NAK handshakes based on the FIFO status. 1 (B_0x1): The core is transmitting NAK handshakes on this endpoint. |
| EPTYP | Endpoint type 0 (B_0x0): Control 1 (B_0x1): Isochronous 2 (B_0x2): Bulk 3 (B_0x3): Interrupt |
| STALL | STALL handshake |
| TXFNUM | Tx FIFO number |
| CNAK | Clear NAK |
| SNAK | Set NAK |
| SD0PID | Set DATA0 PID |
| SD1PID | Set DATA1 PID |
| EPDIS | Endpoint disable |
| EPENA | Endpoint enable |