M16C30P_07 Datasheet, PDF (101/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

M16C/30P Group
13. DMAC
DMAi Control Register (i=0,1)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
Address
After Reset
DM0CON
002Ch
00000X00b
DM1CON
003Ch
00000X00b
Bit Symbol
Bit Name
Function
RW
Transfer Unit Bit Select Bit
0 : 16 bits
DMBIT
1 : 8 bits
RW
Repeat Transfer Mode Select Bit
0 : Single transfer
DMASL
1 : Repeat transfer
RW
DMA Request Bit
DMAS
0 : DMA not requested
1 : DMA requested
RW⁽¹⁾
DMA Enable Bit
0 : Disabled
DMAE
1 : Enabled
RW
Source Address Direction Select
0 : Fixed
DSD
Bit ⁽²⁾
1 : Forw ard
RW
Destination Address Direction Select 0 : Fixed
DAD
Bit ⁽²⁾
1 : Forw ard
RW
—
Nothing is assigned. When w rite, set to “0”.
(b7-b6) When read, their contents are “0”.
—
NOTES :
1. The DMAS bit can be set to “0” by w riting “0” in a program (This bit remains unchanged even if “1” is w ritten).
2. At least one of the DAD and DSD bits must be “0” (address direction fixed).
Figure 13.4 DM0CON and DM1CON Register
Rev.1.22 Mar 29, 2007 Page 85 of 291
REJ09B0179-0122