Section 7 DMA Controller (DMAC)
Rev. 3.00 Mar. 14, 2006 Page 157 of 804
REJ09B0104-0300
7.2.8
DMA Module Request Select Register (DMRSR)
DMRSR is an 8-bit readable/writable register that specifies the on-chip module interrupt source.
The vector number of the interrupt source is specified in eight bits. However, 0 is regarded as no
interrupt source. For the vector numbers of the interrupt sources, refer to table 7.4.
7
0
R/W
6
0
R/W
5
0
R/W
4
0
R/W
3
0
R/W
0
0
R/W
2
0
R/W
1
0
R/W
Bit
Bit Name
Initial Value
R/W
7.3 Transfer
Modes
Table 7.3 shows the DMAC transfer modes. The transfer modes can be specified to the individual
channels.
Table 7.3
Transfer Modes
Address
Register
Address
Mode Transfer
mode
Activation Source
Common Function Source
Destina-
tion
Dual
address
•
Normal transfer
•
Repeat transfer
•
Block transfer
Repeat or block size
= 1 to 65,536 bytes,
1 to 65,536 words, or
1 to 65,536
longwords
•
Auto request
(activated by
CPU)
•
On-chip module
interrupt
•
External request
•
Total transfer
size: 1 to 4
Gbytes or not
specified
•
Offset addition
•
Extended repeat
area function
DSAR DDAR
Single
address
•
Instead of specifying the source or destination address
registers, data is directly transferred from/to the external
device using the
DACK
pin
•
The same settings as above are available other than address
register setting (e.g., above transfer modes can be specified)
•
One transfer can be performed in one bus cycle (the types of
transfer modes are the same as those of dual address modes)
DSAR/
DACK
DACK
/
DDAR
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