DMA_TCDn_CSR field descriptions (continued)
Field
Description
0
START
Channel Start
If this flag is set, the channel is requesting service. The eDMA hardware automatically clears this flag after
the channel begins execution.
0
The channel is not explicitly started.
1
The channel is explicitly started via a software initiated service request.
12.3.35 TCD Beginning Minor Loop Link, Major Loop Count (Channel
Linking Enabled) (DMA_TCDn_BITER_ELINKYES)
If the TCDn_BITER[ELINK] bit is set, the TCDn_BITER register is defined as follows.
Address: 4000_8000h base + 101Eh (32d × i), where i=0d to 15d
Bit
15
14
13
12
11
10
9
8
Read
Write
Reset
Bit
7
6
5
4
3
2
1
0
Read
Write
Reset
* Notes:
x = Undefined at reset.
•
DMA_TCDn_BITER_ELINKYES field descriptions
Field
Description
15
ELINK
Enables channel-to-channel linking on minor loop complete
As the channel completes the minor loop, this flag enables the linking to another channel, defined by
BITER[LINKCH]. The link target channel initiates a channel service request via an internal mechanism that
sets the TCDn_CSR[START] bit of the specified channel. If channel linking disables, the BITER value
extends to 15 bits in place of a link channel number. If the major loop is exhausted, this link mechanism is
suppressed in favor of the MAJORELINK channel linking.
NOTE: When the software loads the TCD, this field must be set equal to the corresponding CITER field;
otherwise, a configuration error is reported. As the major iteration count is exhausted, the
contents of this field are reloaded into the CITER field.
0
The channel-to-channel linking is disabled
1
The channel-to-channel linking is enabled
14–13
Reserved
This field is reserved.
12–9
LINKCH
Link Channel Number
Table continues on the next page...
Chapter 12 Enhanced Direct Memory Access (eDMA)
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
NXP Semiconductors
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