Programming Model
MOTOROLA
DMA Controller
13-15
13.4.1.8 DMA Burst Time-Out Control Register
This register sets the time-out for DMA transfer cycle for all DMA channels, so that the DMA controller
can release the AHB and IP buses on error. An internal counter starts counting when a DMA burst cycle
starts, and resets to zero when the burst is completed. When the counter reaches the count value set in the
register, it asserts an interrupt and sets the corresponding error bit in the DMA burst time-out error register.
The system clock is used as input clock to the counter.
DBTOCR
DMA Burst Time-Out Control Register
Addr
0x0020901C
BIT
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
TYPE
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
RESET
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0x0000
BIT
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
EN
CNT
TYPE
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
RESET
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0x0000
Table 13-10. DMA Burst Time-Out Control Register Description
Name
Description
Settings
Reserved
Bits 31–16
Reserved—These bits are reserved and should read 0.
EN
Bit 15
Enable
—Enables/Disables the burst time-out.
0 = Disables burst time-out
1 = Enables burst time-out
CNT
Bits 14–0
Count
—Contains the time-out count down value.
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