Renesas M16C Series User Manual

DMAC
M30240 Group
Rev.1.00 Sep 24, 2003 Page 262 of 360
Figure 2.106: Set-up procedure for repeat 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)
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
0 : 16 bits
Repeat transfer mode select bit
1 : Repeat transfer
DMA request bit
0 : DMA not requested
DMA enable bit
0 : Disabled
Source address direction select bit
0 : Fixed (Bit 4 and bit 5 cannot be set to “1” simultaneously)
Destination address direction select bit
1 : Forward (Bit 4 and bit 5 cannot be set to “1” simultaneously)
b7 b0
100010
Setting DMAi source pointer
Source pointer
Stores the source address
b7 b0
(b15) (b8)
b7 b0b7 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
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.
DMA request cause select bit
0 0 0 1 : Software trigger
b3 b2 b1 b0
Start DMA transmission
(b8)

Renesas M16C Series Specifications

General

Brand	Renesas
Model	M16C Series
Category	Computer Hardware
Language	English