EDMA3 Registers
11.4.1.4.4 EDMA3CC Status Register (CCSTAT)
The EDMA3CC status register (CCSTAT) has a number of status bits that reflect which parts of the
EDMA3CC logic is active at any given instant of time. The CCSTAT is shown in
and
described in
Figure 11-65. EDMA3CC Status Register (CCSTAT)
31
24
Reserved
R-0
23
22
21
20
19
18
17
16
Reserved
Reserved
QUEACTV3
QUEACTV2
QUEACTV1
QUEACTV0
R-0
R-0
R-0
R-0
R-0
R-0
15
14
13
12
11
10
9
8
Reserved
COMPACTV
R-0
R-0
7
6
5
4
3
2
1
0
Reserved
ACTV
Reserved
TRACTV
QEVTACTV
EVTACTV
R-0
R-0
R-0
R-0
R-0
R-0
LEGEND: R = Read only; -n = value after reset
Table 11-49. EDMA3CC Status Register (CCSTAT) Field Descriptions
Bit
Field
Value
Description
31-20
Reserved
0
Reserved. Always write 0 to this bit; writes of 1 to this bit are not supported and attempts to do so
may result in undefined behavior.
19
QUEACTV3
Queue 3 active.
0
No events are queued in queue 3.
1
At least one TR is queued in queue 3.
18
QUEACTV2
Queue 2 active.
0
No events are queued in queue 2.
1
At least one TR is queued in queue 2.
17
QUEACTV1
Queue 1 active.
0
No events are queued in queue 1.
1
At least one TR is queued in queue 1.
16
QUEACTV0
Queue 0 active.
0
No events are queued in queue 0.
1
At least one TR is queued in queue 0.
15-14
Reserved
0
Reserved. Always write 0 to this bit; writes of 1 to this bit are not supported and attempts to do so
may result in undefined behavior.
13-8
COMPACTV
0-3Fh
Completion request active. The COMPACTV field reflects the count for the number of completion
requests submitted to the transfer controllers. This count increments every time a TR is submitted
and is programmed to report completion (the TCINTEN or TCCCHEN bits in OPT in the parameter
entry associated with the TR are set). The counter decrements for every valid TCC received back
from the transfer controllers. If at any time the count reaches a value of 63, the EDMA3CC will not
service any new TRs until the count is less then 63 (or return a transfer completion code from a
transfer controller, which would decrement the count).
0
No completion requests outstanding.
1h-3Fh
Total of 1 completion request to 63 completion requests are outstanding.
7-5
Reserved
0
Reserved. Always write 0 to this bit; writes of 1 to this bit are not supported and attempts to do so
may result in undefined behavior.
963
SPRUH73H – October 2011 – Revised April 2013
Enhanced Direct Memory Access (EDMA)
Copyright © 2011–2013, Texas Instruments Incorporated