Datasheet

549
AT32UC3A
• DMA_BUFFER_SIZE: DMA Buffer Size
This field indicates the size of the DMA buffer:
• DMA_FIFO_WORD_DEPTH: DMA FIFO Depth in Words
This field indicates the DMA FIFO depth controller in words:
• FIFO_MAX_SIZE: Maximal FIFO Size
This field indicates the maximal FIFO size, i.e. the DPRAM size:
• BYTE_WRITE_DPRAM: DPRAM Byte-Write Capability
This field indicates whether the DPRAM is byte-write capable:
DMA_BUFFER_SIZE DMA Buffer Size
0 16 bits
1 24 bits
DMA_FIFO_WORD_DEPTH DMA FIFO Depth in Words
0 0 0 0 16
0 0 0 1 1
0 0 1 0 2
...
1 1 1 1 15
FIFO_MAX_SIZE Maximal FIFO Size
0 0 0 < 256 bytes
0 0 1 < 512 bytes
0 1 0 < 1024 bytes
0 1 1 < 2048 bytes
1 0 0 < 4096 bytes
1 0 1 < 8192 bytes
1 1 0 < 16384 bytes
1 1 1 >= 16384 bytes
BYTE_WRITE_DPRAM DPRAM Byte-Write Capability
0 DPRAM byte write lanes have shadow logic implemented in the USB macro IP interface.
1 DPRAM is natively byte-write capable.
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AVR32-01/12