Freescale Semiconductor MK22FN256VDC12, Reference Manual

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22.3.22 TCD Signed Minor Loop Offset (Minor Loop Enabled and
Offset Disabled) (DMA_TCDn_NBYTES_MLOFFNO)
One of three registers (this register, TCD_NBYTES_MLNO, or
TCD_NBYTES_MLOFFYES), defines the number of bytes to transfer per request.
Which register to use depends on whether minor loop mapping is disabled, enabled but
not used for this channel, or enabled and used.
TCD word 2 is defined as follows if:
• Minor loop mapping is enabled (CR[EMLM] = 1) and
• SMLOE = 0 and DMLOE = 0
If minor loop mapping is enabled and SMLOE or DMLOE is set, then refer to the
TCD_NBYTES_MLOFFYES register description. If minor loop mapping is disabled,
then refer to the TCD_NBYTES_MLNO register description.
Address: 4000_8000h base + 1008h (32d × i), where i=0d to 15d
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R
SMLOE DMLOE
NBYTES
W
Reset x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x*
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
NBYTES
W
Reset
x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x*
* Notes:
x = Undefined at reset. •
DMA_TCDn_NBYTES_MLOFFNO field descriptions
Field Description
31
SMLOE
Source Minor Loop Offset Enable
Selects whether the minor loop offset is applied to the source address upon minor loop completion.
0 The minor loop offset is not applied to the SADDR
1 The minor loop offset is applied to the SADDR
30
DMLOE
Destination Minor Loop Offset enable
Selects whether the minor loop offset is applied to the destination address upon minor loop completion.
Table continues on the next page...
Chapter 22 Enhanced Direct Memory Access (eDMA)
K22F Sub-Family Reference Manual , Rev. 3, 7/2014
Freescale Semiconductor, Inc. 465