CHAPTER 6 DMA FUNCTIONS (DMA CONTROLLER)
User’s Manual U12688EJ4V0UM00
169
Bit Position
Bit Name
Function
Destination Address count Direction
Sets the count direction of the destination address for DMA channel n.
DAD1
DAD0
Count Direction
0
0
Increment
0
1
Decrement
1
0
Fixed
1
1
Setting prohibited
5, 4
DAD1,
DAD0
Transfer Mode
Sets the transfer mode during DMA transfer.
TM1
TM0
Transfer Mode
0
0
Single transfer mode
0
1
Single-step transfer mode
1
0
Block transfer mode
1
1
Setting prohibited
3, 2
TM1, TM0
1
TTYP
Transfer Type
Sets the DMA transfer type.
0: Two-cycle transfer
1: Flyby transfer
0
TDIR
Transfer Direction
Sets the transfer direction during transfer between I/O and memory. The setting is valid
during flyby transfer only and ignored during two-cycle transfer.
0: Memory
→
I/O (read)
1: I/O
→
memory (write)
Remark
n = 0 to 3
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