Texas Instruments AM335 Series Technical Reference Manual

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Table 11-6. EDMA3 Channel Parameter Description
Offset Address
(bytes) Acronym Parameter Description
0h OPT Channel Options Transfer configuration options
4h SRC Channel Source Address The byte address from which data is transferred
8h
(1)
ACNT Count for 1st Dimension Unsigned value specifying the number of contiguous
bytes within an array (first dimension of the transfer).
Valid values range from 1 to 65 535.
BCNT Count for 2nd Dimension Unsigned value specifying the number of arrays in a
frame, where an array is ACNT bytes. Valid values
range from 1 to 65 535.
Ch DST Channel Destination Address The byte address to which data is transferred
10h
(1)
SRCBIDX Source BCNT Index Signed value specifying the byte address offset between
source arrays within a frame (2nd dimension). Valid
values range from –32 768 and 32 767.
DSTBIDX Destination BCNT Index Signed value specifying the byte address offset between
destination arrays within a frame (2nd dimension). Valid
values range from –32 768 and 32 767.
14h
(1)
LINK Link Address The PaRAM address containing the PaRAM set to be
linked (copied from) when the current PaRAM set is
exhausted. A value of FFFFh specifies a null link.
BCNTRLD BCNT Reload The count value used to reload BCNT when BCNT
decrements to 0 (TR is submitted for the last array in
2nd dimension). Only relevant in A-synchronized
transfers.
18h
(1)
SRCCIDX Source CCNT Index Signed value specifying the byte address offset between
frames within a block (3rd dimension). Valid values
range from –32 768 and 32 767.
A-synchronized transfers: The byte address offset from
the beginning of the last source array in a frame to the
beginning of the first source array in the next frame.
AB-synchronized transfers: The byte address offset from
the beginning of the first source array in a frame to the
beginning of the first source array in the next frame.
DSTCIDX Destination CCNT index Signed value specifying the byte address offset between
frames within a block (3rd dimension). Valid values
range from –32 768 and 32 767.
A-synchronized transfers: The byte address offset from
the beginning of the last destination array in a frame to
the beginning of the first destination array in the next
frame.
AB-synchronized transfers: The byte address offset from
the beginning of the first destination array in a frame to
the beginning of the first destination array in the next
frame.
1Ch CCNT Count for 3rd Dimension Unsigned value specifying the number of frames in a
block, where a frame is BCNT arrays of ACNT bytes.
Valid values range from 1 to 65 535.
RSVD Reserved Reserved. Always write 0 to this bit; writes of 1 to this bit
are not supported and attempts to do so may result in
undefined behavior.
(1)
It is recommended to access the parameter set sets as 32-bit words whenever possible.
884
Enhanced Direct Memory Access (EDMA) SPRUH73H–October 2011–Revised April 2013
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Texas Instruments AM335 Series Specifications

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Brand	Texas Instruments
Model	AM335 Series
Category	Computer Hardware
Language	English