NEC 78K0R/KE3 User Manual page 558

Remark n: DMA channel number (n = 0, 1)
558
CHAPTER 14 DMA CONTROLLER
Figure 14-6. Operation Procedure
DENn = 1
Setting DSAn, DRAn, DBCn, and DMCn
DSTn = 1
DMA trigger = 1?
Yes
Transmitting DMA request
Receiving DMA acknowledge
DMA transfer
DRAn = DRAn + 1 (or + 2)
DBCn = DBCn − 1
DBCn = 0000H ?
Yes
DSTn = 0
INTDMAn = 1
DENn = 0
User's Manual U17854EJ9V0UD
Set by software program
No
Operation by DMA
controller (hardware)
No
Set by software program