NXP Semiconductors Kinetis KE1xZ256, Reference Manual

Page: 240 / 1325

DMA_TCDn_BITER_ELINKYES field descriptions (continued)
Field Description
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. If the channel is configured to execute a
single service request, the initial values of BITER and CITER should be 0x0001.
13.3.36 TCD Beginning Minor Loop Link, Major Loop Count (Channel
Linking Disabled) (DMA_TCDn_BITER_ELINKNO)
If the TCDn_BITER[ELINK] bit is cleared, the TCDn_BITER register is defined as
follows.
Address: 4000_8000h base + 101Eh (32d × i), where i=0d to 7d
Bit 15 14 13 12 11 10 9 8
Read
ELINK BITER
Write
Reset
x* x* x* x* x* x* x* x*
Bit 7 6 5 4 3 2 1 0
Read
BITER
Write
Reset x* x* x* x* x* x* x* x*
* Notes:
x = Undefined at reset. •
DMA_TCDn_BITER_ELINKNO 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 is disabled, 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
BITER Starting Major Iteration Count
As the transfer control descriptor is first loaded by software, this 9-bit (ELINK = 1) or 15-bit (ELINK = 0)
field must be equal to the value in the CITER field. As the major iteration count is exhausted, the contents
of this field are reloaded into the CITER field.
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
Table continues on the next page...
Memory map/register definition
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
240 NXP Semiconductors