LM3S3739 Luminary Micro, Inc, LM3S3739 Datasheet - Page 218

• Manufacturer Part Number: LM3S3739
• Description: Lm3s3739 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Reset
Reset
Reset
Reset
Type
Type
Type
Type
Micro Direct Memory Access (μDMA)
DMAREQMASKSET Reads
DMA Channel Request Mask Set (DMAREQMASKSET)
Base 0x400F.F000
Offset 0x020
Type RO, reset 0x0000.0000
DMAREQMASKSET Writes
DMA Channel Request Mask Set (DMAREQMASKSET)
Base 0x400F.F000
Offset 0x020
Type WO, reset 0x0000.0000
218
Bit/Field
31:0
31
15
31
15
W
W
R
0
R
0
0
0
Register 12: DMA Channel Request Mask Set (DMAREQMASKSET), offset
0x020
Each bit of the DMAREQMASKSET register represents the corresponding DMA channel. Writing
a 1 disables DMA requests for the channel. Reading the register returns the request mask status.
When a μDMA channel's request is masked, that means the peripheral can no longer request μDMA
transfers. The channel can then be used for software-initiated transfers.
30
14
30
14
W
W
R
R
0
0
0
0
29
13
29
13
W
W
R
R
0
0
0
0
SET[n]
Name
28
12
28
12
W
W
R
R
0
0
0
0
27
11
27
W
11
W
R
R
0
0
0
0
Type
R
26
10
26
10
W
W
R
R
0
0
0
0
Reset
25
25
W
W
R
R
0x00
0
9
0
0
9
0
Preliminary
24
24
W
W
R
R
0
8
0
0
8
0
SET[n]
SET[n]
SET[n]
SET[n]
Description
Channel [n] Request Mask Set
Returns the channel request mask status.
Value
0
1
23
23
W
W
R
R
0
7
0
0
7
0
Description
Enabled
External requests are not masked for channel [n].
Masked
External requests are masked for channel [n].
22
22
W
W
R
0
6
R
0
0
6
0
21
21
W
W
R
R
0
5
0
0
5
0
20
20
W
W
R
R
0
4
0
0
4
0
19
19
W
W
R
R
0
3
0
0
3
0
18
18
W
W
R
R
0
2
0
0
2
0
17
17
W
W
R
0
1
R
0
0
1
0
June 02, 2008
16
16
W
W
R
R
0
0
0
0
0
0