EDMA3 Registers
11.4.1.6.8 Secondary Event Registers (SER, SERH)
The secondary event registers (SER/SERH) provide information on the state of a DMA channel or event
(0 through 63). If the EDMA3CC receives a TR synchronization due to a manual-trigger, event-trigger, or
chained-trigger source (ESR.En/ESRH.En = 1, ER.En/ERH.En = 1, or CER.En/CERH.En = 1), which
results in the setting of a corresponding event bit in SER/SERH (SER.En/SERH.En = 1), it implies that the
corresponding DMA event is in the queue.
Once a bit corresponding to an event is set in SER/SERH, the EDMA3CC does not prioritize additional
events on the same DMA channel. Depending on the condition that lead to the setting of the SER bits,
either the EDMA3CC hardware or the software (using SECR/SECRH) needs to clear the SER/SERH bits
for the EDMA3CC to evaluate subsequent events (subsequent transfers) on the same channel. For
additional conditions that can cause the secondary event registers to be set, see EDMA Overview.
The SER is shown in
and described in
. The SERH is shown in
and
described in
Figure 11-84. Secondary Event Register (SER)
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
E31
E30
E29
E28
E27
E26
E25
E24
E23
E22
E21
E20
E19
E18
E17
E16
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
E15
E14
E13
E12
E11
E10
E9
E8
E7
E6
E5
E4
E3
E2
E1
E0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
LEGEND: R = Read only; -n = value after reset
Table 11-68. Secondary Event Register (SER) Field Descriptions
Bit
Field
Value
Description
31-0
En
Secondary event register. The secondary event register is used along with the event register (ER) to
provide information on the state of an event.
0
Event is not currently stored in the event queue.
1
Event is currently stored in the event queue. Event arbiter will not prioritize additional events.
Figure 11-85. Secondary Event Register High (SERH)
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
E63
E62
E61
E60
E59
E58
E57
E56
E55
E54
E53
E52
E51
E50
E49
E48
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
E47
E46
E45
E44
E43
E42
E41
E40
E39
E38
E37
E36
E35
E34
E33
E32
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
LEGEND: R = Read only; -n = value after reset
Table 11-69. Secondary Event Register High (SERH) Field Descriptions
Bit
Field
Value
Description
31-0
En
Secondary event register. The secondary event register is used along with the event register high (ERH)
to provide information on the state of an event.
0
Event is not currently stored in the event queue.
1
Event is currently stored in the event queue. Event submission/prioritization logic will not prioritize
additional events.
979
SPRUH73H – October 2011 – Revised April 2013
Enhanced Direct Memory Access (EDMA)
Copyright © 2011–2013, Texas Instruments Incorporated