Datasheet

548
AT32UC3A
30.8.1.6 USB IP Features Register (UFEATURES)
Offset: 0x081C
Register Name: UFEATURES
Access Type: Read-Only
Read Value: 0x00012467
• EPT_NBR_MAX: Maximal Number of Pipes/Endpoints
This field indicates the number of hardware-implemented pipes/endpoints:
• DMA_CHANNEL_NBR: Number of DMA Channels
This field indicates the number of hardware-implemented DMA channels:
31 30 29 28 27 26 25 24
– – – – – – – –
23 22 21 20 19 18 17 16
– – – – – – – –
15 14 13 12 11 10 9 8
BYTE_WRITE
_DPRAM
FIFO_MAX_SIZE DMA_FIFO_WORD_DEPTH
r r r
0 0 1 0 0 1 0 0
7 6 5 4 3 2 1 0
DMA_BUFFER
_SIZE
DMA_CHANNEL_NBR EPT_NBR_MAX
r r r
0 1 1 0 0 1 1 1
EPT_NBR_MAX Maximal Number of Pipes/Endpoints
0 0 0 0 16
0 0 0 1 1
0 0 1 0 2
...
1 1 1 1 15
DMA_CHANNEL_NBR Number of DMA Channels
0 0 0 Reserved
0 0 1 1
0 1 0 2
...
1 1 1 7
32058K
AVR32-01/12