DMA_HRS field descriptions (continued)
Field
Description
4
HRS4
Hardware Request Status Channel 4
0
A hardware service request for the corresponding channel is not present
1
A hardware service request for the corresponding channel is present
3
HRS3
Hardware Request Status Channel 3
0
A hardware service request for the corresponding channel is not present
1
A hardware service request for the corresponding channel is present
2
HRS2
Hardware Request Status Channel 2
0
A hardware service request for the corresponding channel is not present
1
A hardware service request for the corresponding channel is present
1
HRS1
Hardware Request Status Channel 1
0
A hardware service request for the corresponding channel is not present
1
A hardware service request for the corresponding channel is present
0
HRS0
Hardware Request Status Channel 0
0
A hardware service request for the corresponding channel is not present
1
A hardware service request for the corresponding channel is present
21.3.16 Channel n Priority Register (DMA_DCHPRIn)
When fixed-priority channel arbitration is enabled (CR[ERCA] = 0), the contents of these
registers define the unique priorities associated with each channel. The channel priorities
are evaluated by numeric value; for example, 0 is the lowest priority, 1 is the next
priority, then 2, 3, etc. Software must program the channel priorities with unique values.
Otherwise, a configuration error is reported. The range of the priority value is limited to
the values of 0 through 15.
Addresses: 4000_8000h base + 100h (1d ×
n
), where
n
= 0d to 15d
Bit
7
6
5
4
3
2
1
0
Read
Write
Reset
* Notes:
x = Undefined at reset.
•
DMA_DCHPRIn field descriptions
Field
Description
7
ECP
Enable Channel Preemption
Table continues on the next page...
Memory map/register definition
K53 Sub-Family Reference Manual, Rev. 6, Nov 2011
478
Freescale Semiconductor, Inc.
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