Datasheet

 2017 Microchip Technology Inc. DS60001516A-page 687
SAM9G20
36.6.11 UDP FIFO Data Register
Name:UDP_FDRx [x = 0..5]
Access:Read/Write
FIFO_DATA[7:0]: FIFO Data Value
The microcontroller can push or pop values in the FIFO through this register.
RXBYTECNT in the corresponding UDP_CSRx register is the number of bytes to be read from the FIFO (sent by the host).
The maximum number of bytes to write is fixed by the Max Packet Size in the Standard Endpoint Descriptor. It can not be more than the
physical memory size associated to the endpoint. Refer to the Universal Serial Bus Specification, Rev. 2.0 for more information.
31 30 29 28 27 26 25 24
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15 14 13 12 11 10 9 8
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76543210
FIFO_DATA