ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 1006

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

Specifications of ATSAM3U-EK

• Contents: Board
• Processor To Be Evaluated: SAM3U
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: SAM3U4E
• Silicon Family Name: SAM3U
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT91SAM3U
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

39.7.20
Name:
Address:
Access:
Note:
• BUFF_ADD
This field determines the AHB bus starting address of a DMA channel transfer.
Channel start and end addresses may be aligned on any byte boundary.
The firmware may write this field only when the UDPHS_DMASTATUS register CHANN_ENB bit is clear.
This field is updated at the end of the address phase of the current access to the AHB bus. It is incrementing of the access
byte width. The access width is 4 bytes (or less) at packet start or end, if the start or end address is not aligned on a word
boundary.
The packet start address is either the channel start address or the next channel address to be accessed in the channel
buffer.
The packet end address is either the channel end address or the latest channel address accessed in the channel buffer.
The channel start address is written by software or loaded from the descriptor, whereas the channel end address is either
determined by the end of buffer or the UDPHS device, USB end of transfer if the UDPHS_DMACONTROLx register
END_TR_EN bit is set.
1006
1006
31
23
15
7
Channel 0 is not used.
SAM3U Series
SAM3U Series
UDPHS DMA Channel Address Register
UDPHS_DMAADDRESSx [x = 0..5]
0x400A4304 [0], 0x400A4314 [1], 0x400A4324 [2], 0x400A4334 [3], 0x400A4344 [4], 0x400A4354 [5]
Read-write
30
22
14
6
29
21
13
5
28
20
12
4
BUFF_ADD
BUFF_ADD
BUFF_ADD
BUFF_ADD
27
19
11
3
26
18
10
2
25
17
9
1
6430D–ATARM–25-Mar-11
6430D–ATARM–25-Mar-11
24
16
8
0