OTG device IN endpoint 3 transfer size register
| XFRSIZ | Transfer size This field contains the transfer size in bytes for the current endpoint. The core only interrupts the application after it has exhausted the transfer size amount of data. The transfer size can be set to the maximum packet size of the endpoint, to be interrupted at the end of each packet. The core decrements this field every time a packet from the external memory is written to the Tx FIFO. |
| PKTCNT | Packet count Indicates the total number of USB packets that constitute the transfer size amount of data for this endpoint. This field is decremented every time a packet (maximum size or short packet) is read from the Tx FIFO. |
| MCNT | Multi count For periodic IN endpoints, this field indicates the number of packets that must be transmitted per frame on the USB. The core uses this field to calculate the data PID for isochronous IN endpoints. 1 (B_0x1): 1 packet 2 (B_0x2): 2 packets 3 (B_0x3): 3 packets |