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NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 310 -
Revision V1.30
NUC97
0
T
E
CHNIC
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L
RE
F
E
RE
N
CE
MA
NUA
L
[6]
DAFIX
Destination Address Fixed
0 = Destination address is changed during the GDMA operation.
1 = Do not change the destination address during the GDMA operation. This feature can be
used when data were transferred from multiple sources to a single destination.
[5]
SADIR
Source Address Direction
0 = Source address is incremented successively.
1 = Source address is decremented successively.
[4]
DADIR
Destination Address Direction
0 = Destination address is incremented successively.
1 = Destination address is decremented successively.
[3:2]
GDMAMS
GDMA Mode Select
00 = Software mode (Memory-to-Memory).
01 = Reserved.
10 = Reserved.
11 = Reserved.
[1]
BME
Burst Mode Enable
0 = Disables the 8-data burst mode.
1 = Enables the 8-data burst mode.
FF there are 8 words to be transferred, and BME [1]=1, the GDMA_TCNT should be 0x01;.
However, if BME [1]=0, the GDMA_TCNT should be 0x08.
[0]
GDMAEN
GDMA Enable
0 = Disables the GDMA operation.
1 = Enables the GDMA operation; this bit will be clear automatically when the transfer is
complete on AUTOIEN [19] register bit is on Disable mode.
when operate in Non-Descriptor mode, this bit determine the Memory-to-Memory, Memory-
to-I/O and I/O-to-Memory operation or not.
When operate in Descriptor mode, this bit determines the I/O-to-Memory operation or not.
Channel reset will clear this bit.