NEC UPD703116 User Manual page 135

CHAPTER 6 DMA FUNCTIONS (DMA CONTROLLER)
Bit position Bit name
7, 6 SAD1, Sets the count direction of the source address for DMA channel n (n = 0 to 3).
SAD0
5, 4 DAD1, Sets the count direction of the destination address for DMA channel n (n = 0 to 3).
DAD0
3, 2 TM1, TM0 Sets the transfer mode during DMA transfer.
SAD1 SAD0
0 0 Increment
0 1 Decrement
1 0 Fixed
1 1 Setting prohibited
DAD1 DAD0
0 0 Increment
0 1 Decrement
1 0 Fixed
1 1 Setting prohibited
TM1 TM0
0 0 Single transfer mode
0 1 Single-step transfer mode
1 0 Setting prohibited
1 1 Block transfer mode
User's Manual U14492EJ5V0UD
Function
Count direction
Count direction
Transfer mode
(2/2)
135