PXD10RM Datasheet, PDF (505/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

Table 15-27. TCDn Word 6 (TCDn.dlast_sga) field description
Name
Description
Value
dlast_sga[31:0
0:31]
Last destination address adjustment or
the memory address for the next transfer
control descriptor to be loaded into this
channel (scatter/gather)
if (TCD.e_sg = 0) then
Adjustment value added to the destination address at
the completion of the outer major iteration count.
This value can be applied to “restore” the destination
address to the initial value, or adjust the address to
reference the next data structure.
else
This address points to the beginning of a 0-modulo-32
region containing the next transfer control descriptor to
be loaded into this channel. This channel reload is
performed as the major iteration count completes. The
scatter/gather address must be 0-modulo-32, else a
configuration error is reported.
Figure 15-27 and Table 15-28 define word 7 of the TCDn structure, the biter and control/status fields.
Register address: DMA_Offset + 0x1000 + (32 x n) + 0x1c
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R
biter[0:15]
W
RESET: -
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R
bwc
W
major.linkch[0:5]
done active major. e_sg d_req int_ha int_m start
e_link
lf
aj
RESET: -
-
-
-
-
-
-
-
0
0
-
-
-
-
-
0
= Unimplemented
Figure 15-27. TCDn Word 7 (TCDn.{biter,control/status}) Fields
Table 15-28. TCDn Word 7 (TCDn.{biter, control/status}) field descriptions
Name
biter.e_link
Description
Enable channel-to-channel linking
on minor loop complete
Value
This is the initial value copied into the citer.e_link field
when the major loop is completed. The citer.e_link
field controls channel linking during channel
execution. This bit must be equal to the citer.e_link bit
otherwise a configuration error will be reported.
0 The channel-to-channel linking is disabled.
1 The channel-to-channel linking is enabled.
Freescale Semiconductor
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
15-35