M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 434

• Manufacturer Part Number: M30622MA-XXXFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
• Manufacturer: RENESAS [Renesas Technology Corp]

DMAC
Figure 2.9.3. DMAC-related registers (2)
DMAi control register
b7
(b23)
DMAi transfer counter (i = 0, 1)
(b23)
DMAi source pointer (i = 0, 1)
DMAi destination pointer (i = 0, 1)
(b15)
b7
b7
b7
b6
b5
b4
(b19)
(b19)
b3
b3
b3
b2
b1
(b16)(b15)
(b16)
(b8)
b0
b0
b0
b0
(b15)
b7
b7
b7
Note 1: DMA request can be cleared by resetting the bit.
Note 2: This bit can only be set to “0”.
Note 3: Source address direction select bit and destination address direction select bit
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
Bit symbol
DMBIT
DMASL
DMAS
DMAE
DSD
DAD
Symbol
DMiCON(i=0,1)
cannot be set to “1” simultaneously.
Transfer unit bit select bit
Repeat transfer mode
DMA request bit (Note 1)
DMA enable bit
Source address direction
select bit (Note 3)
Destination address
direction select bit (Note 3)
• Transfer counter
• Source pointer
• Destination pointer
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
Set a value one less than the transfer count
Stores the source address
Stores the destination address
(b8)
(b8)
b0
b0
b0
b7
b7
Bit name
002C
select bit
Address
16
, 003C
Function
Function
Function
Symbol
TCR0
TCR1
16
0 : 16 bits
1 : 8 bits
0 : Single transfer
1 : Repeat transfer
0 : DMA not requested
1 : DMA requested
0 : Disabled
1 : Enabled
0 : Fixed
1 : Forward
0 : Fixed
1 : Forward
b0
b0
Symbol
SAR0
SAR1
Symbol
DAR0
DAR1
When reset
00000X00
Function
0029
0039
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Address
2
16
16
0032
0026
0036
0022
, 0028
, 0038
00000
Address
00000
Address
16
16
16
16
0000
Transfer count
16
16
Transfer count
Transfer count
to 0020
to 0030
to 0024
to 0034
specification
specification
specification
16
16
16
to FFFFF
to FFFFF
to FFFF
Indeterminate
Indeterminate
16
When reset
16
16
16
R
16
16
Indeterminate
Indeterminate
16
Indeterminate
Indeterminate
When reset
When reset
(Note 2)
R W
W
R W
R W
Mitsubishi microcomputers
M16C / 62 Group
419