Renesas M16C Series User Manual page 276

M30240 Group
DMAi control register DMAi control register
b7 b7 b6 b6 b5 b5 b4 b4 b3 b3 b2 b2
DMAi source pointer (i = 0, 1) DMAi source pointer (i = 0, 1)
(b19) (b19)
b3 b3
b7 b7
(b23) (b23)
DMAi destination pointer (i = 0, 1) DMAi destination pointer (i = 0, 1)
(b19) (b19)
(b23) (b23)
b3 b3
b7 b7
DMAi transfer counter (i = 0, 1) DMAi transfer counter (i = 0, 1)
(b15) (b15)
b7 b7
Figure 2.102: DMAC-related registers (2)
Rev.1.00 Sep 24, 2003 Page 258 of 360
Symbol Symbol
b1 b1 b0 b0
DMiCON(i=0,1) DMiCON(i=0,1) 002C 002C
Bit symbol Bit symbol Bit name Bit name
Transfer unit bit select bit Transfer unit bit select bit
DMBIT DMBIT
Repeat transfer mode Repeat transfer mode
DMASL DMASL
select bit select bit
DMA request bit (Note 1) DMA request bit (Note 1)
DMAS DMAS
DMA enable bit DMA enable bit
DMAE DMAE
Source address direction Source address direction
DSD DSD
select bit (Note 3) select bit (Note 3)
Destination address Destination address
DAD DAD
direction select bit (Note 3) direction select bit (Note 3)
Nothing is assigned. Nothing is assigned.
Write "0" when writing to these bits. The value will be "0" when read.
Note 1: DMA request can be cleared by resetting the bit. Note 1: DMA request can be cleared by resetting the bit.
Note 2: This bit can only be set to "0". Note 2: This bit can only be set to "0".
Note 3: Source address direction select bit and destination address direction select bit Note 3: Source address direction select bit and destination address direction select bit
cannot be set to "1" simultaneously. cannot be set to "1" simultaneously.
(b16)(b15) (b16)(b15) (b8) (b8)
b0 b0 b7 b7 b0 b0 b7 b7
• Source pointer • Source pointer
Stores the source address Stores the source address
Nothing is assigned. Nothing is assigned.
Write "0" when writing to these bits. The value will be "0" when read.
(b16) (b16) (b15) (b15) (b8) (b8)
b0 b0 b7 b7 b0 b0 b7 b7
• Destination pointer • Destination pointer
Stores the destination address Stores the destination address
Nothing is assigned. Nothing is assigned.
Write "0" when writing to these bits. The value will be "0" when read.
(b8) (b8)
b0 b0 b7 b7 b0 b0
• Transfer counter • Transfer counter
Set a value one less than the transfer count Set a value one less than the transfer count
Address Address When reset When reset
, 003C , 003C 00000X00 00000X00
16 16 16 16 2 2
Function Function
0 : 16 bits 0 : 16 bits
1 : 8 bits 1 : 8 bits
0 : Single transfer 0 : Single transfer
1 : Repeat transfer 1 : Repeat transfer
0 : DMA not requested 0 : DMA not requested
1 : DMA requested 1 : DMA requested
0 : Disabled 0 : Disabled
1 : Enabled 1 : Enabled
0 : Fixed 0 : Fixed
1 : Forward 1 : Forward
0 : Fixed 0 : Fixed
1 : Forward 1 : Forward
Symbol Symbol
b0 b0
SAR0 SAR0
SAR1 SAR1
Function Function
Symbol Symbol
b0 b0
DAR0 DAR0
DAR1 DAR1
Function Function
Symbol Symbol Address Address
TCR0 TCR0 0029 0029
16 16
TCR1 TCR1 0039 0039
16 16
Function Function
R R W W
(Note 2) (Note 2)
Address Address When reset When reset
0022 0022 to 0020 to 0020 Indeterminate Indeterminate
16 16 16 16
0032 0032 to 0030 to 0030 Indeterminate Indeterminate
16 16 16 16
Transfer count Transfer count
R W R W
specification specification
00000 00000 to FFFFF to FFFFF
16 16 16 16
Address Address When reset When reset
0026 0026 to 0024 to 0024 Indeterminate Indeterminate
16 16 16 16
0036 0036 to 0034 to 0034 Indeterminate Indeterminate
16 16 16 16
Transfer count Transfer count
R W R W
specification specification
00000 00000 to FFFFF to FFFFF
16 16 16 16
When reset When reset
, 0028 , 0028 Indeterminate Indeterminate
16 16
, 0038 , 0038 Indeterminate Indeterminate
16 16
Transfer count Transfer count
R W R W
specification specification
0000 0000 to FFFF to FFFF
16 16 16 16
DMAC