at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 314

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

24.4.8
Name: DMAC_SGRx
Access: Read/Write
Reset: 0x0
The address offset for each channel is: 0x48+[x * 0x58]
For example, SGR0: 0x048, SGR1: 0x0a0, etc.
The DMAC_CTLx.SINC field controls whether the address increments or decrements. When the DMAC_CTLx.SINC field
indicates a fixed-address control, then the address remains constant throughout the transfer and the DMAC_SGRx register
is ignored.
• SGI: Source Gather Interval
Source gather count field specifies the number of contiguous source transfers of DMAC_CTLx.SRC_TR_WIDTH between
successive gather intervals. This is defined as a gather boundary.
• SGC: Source gather count
Source gather interval field (DMAC_SGRx.SGI) – specifies the source address increment/decrement in multiples of
DMAC_CTLx.SRC_TR_WIDTH on a gather boundary when gather mode is enabled for the source transfer.
6249D–ATARM–20-Dec-07
31
23
15
–
7
Source Gather Register for Channel x
30
22
14
–
6
SGC
29
21
13
–
5
28
20
12
–
4
SGI
SGI
27
19
11
–
3
AT91SAM9263 Preliminary
26
18
10
–
2
SGI
25
17
–
9
1
24
16
–
8
0
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