Renesas M16C Series User Manual

DMAC
M30240 Group
Rev.1.00 Sep 24, 2003 Page 260 of 360
Figure 2.104: Set-up procedure for one-shot transfer mode
When software DMA request bit = “1”
Setting DMAi request cause select register
DMAi request cause select register (i = 0, 1) [Address 03B8 16, 03BA16]
DMiSL(i = 0, 1)
DMA request cause select bit
0 0 0 1 : Software trigger
b3 b2 b1 b0
b7 b0
01000
Software DMA request bit
Set to “0”
Setting DMAi control register
DMAi control register (i = 0, 1) [Address 002C 16, 003C16]
DMiCON(i = 0, 1)
Transfer unit bit select bit
1 : 8 bits
Repeat transfer mode select bit
0 : Single transfer
DMA request bit
0 : DMA not requested
DMA enable bit
0 : Disabled
Source address direction select bit
1 : Forward
(Bit 4 and bit 5 cannot be set to “1” simultaneously)
Destination address direction select bit
0 : Fixed
(Bit 4 and bit 5 cannot be set to “1” simultaneously)
b7 b0
010001
Setting DMAi source pointer
Source pointer
Stores the source address
b7 b0
(b15) (b8)
b7 b0
b7
b0
(b16)
(b23)
DMA0 source pointer [Address 0022 16 to 002016] SAR0
DMA1 source pointer [Address 0032
16 to 003016] SAR1
b3
(b19)
Setting DMAi destination pointer
Destination pointer
Stores the destination address
b7 b0
(b15) (b8)
b7 b0b7 b0
(b16)(b23)
DMA0 destination pointer [Address 0026 16 to 002416] DAR0
DMA1 destination pointer [Address 0036
16 to 003416] DAR1
b3
(b19)
Setting DMAi transfer counter
Transfer counter
Set a value one less than the transfer count
b0
(b8)
b7 b0
DMA0 transfer counter [Address 0029 16, 002816] TCR0
DMA1 transfer counter [Address 0039
16, 003816] TCR1
b0
(b15)
Setting DMAi control register
DMAi control register (i = 0, 1) [Address 002C 16, 003C16]
DMiCON(i = 0, 1)
DMA enable bit
1 : Enabled
b7 b0
1
Note: Clear DMA request bit simultaneously again.
Start DMA transmission

Renesas M16C Series Specifications

General

Brand	Renesas
Model	M16C Series
Category	Computer Hardware
Language	English