M16C80 Datasheet, PDF (94/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
11. DMAC
DMA mode register 0
(CPU internal register)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DMD0
When reset
0016
Bit symbol
Bit name
Function
MD00
MD01
Channel 0 transfer
mode select bit
b1 b0
0 0 : DMA inhibit
0 1 : Single transfer
1 0 : Reserved
1 1 : Repeat transfer
RW
BW0
RW0
MD10
MD11
Channel 0 transfer 0 : 8 bits
unit select bit
1 : 16 bits
Channel 0 transfer _{0 : Fixed address to memory (forward direction)}
direction select bit _{1 : Memory (forward direction) to fixed address}
Channel 1 transfer
mode select bit
b5 b4
0 0 : DMA inhibit
0 1 : Single transfer
1 0 : Reserved
1 1 : Repeat transfer
BW1
RW1
Channel 1 transfer 0 : 8 bits
unit select bit
1 : 16 bits
Channel 1 transfer _{0 : Fixed address to memory (forward direction)}
direction select bit _{1 : Memory (forward direction) to fixed address}
DMA mode register 1
(CPU internal register)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DMD1
When reset
0016
Bit symbol
Bit name
Function
MD20
MD21
Channel 2 transfer
mode select bit
b1 b0
0 0 : DMA inhibit
0 1 : Single transfer
1 0 : Reserved
1 1 : Repeat transfer
RW
BW2
RW2
MD30
MD31
Channel 2 transfer _{0 : 8 bits}
unit select bit
1 : 16 bits
Channel 2 transfer 0 : Fixed address to memory (forward direction)
direction select bit 1 : Memory (forward direction) to fixed address
Channel 3 transfer
mode select bit
b5 b4
0 0 : DMA inhibit
0 1 : Single transfer
1 0 : Reserved
1 1 : Repeat transfer
BW3
RW3
Channel 3 transfer _{0 : 8 bits}
unit select bit
1 : 16 bits
Channel 3 transfer 0 : Fixed address to memory (forward direction)
direction select bit 1 : Memory (forward direction) to fixed address
Figure 11.3 DMAC register (2)
Rev.1.00 Aug. 02, 2005 ^{Page 83} of 329
REJ09B0187-0100