![](http://datasheet.mmic.net.cn/110000/M37721S1BFP_datasheet_3496256/M37721S1BFP_360.png)
DMA CONTROLLER
13.8 Link array chain transfer mode
13-81
7721 Group User‘s Manual
b7
b0
b15
b8
Source address register 0 (Addresses 1FC216 to 1FC016) (SAR0)
Source address register 1 (Addresses 1FD216 to 1FD016) (SAR1)
Source address register 2 (Addresses 1FE216 to 1FE016) (SAR2)
Source address register 3 (Addresses 1FF216 to 1FF016) (SAR3)
Functions
Bit
At reset
RW
23 to 0 [Write]
Set the start address of transfer parameter memory
of block which is first transferred.
These bits can be set to “00000016” to “FFFFFF16.”
[Read]
After a value is written to this register and until
transfer starts, the read value indicates the written
value (the start address of the transfer parameter
memory of block which is first transferred).
After transfer starts, the read value indicates the
source address of data which is next transferred.
Undefined
RW
Note: When writing to this register, write to all 24 bits.
b23
b16
b7
b0
b15
b8
Destination address register 0 (Addresses 1FC616 to 1FC416) (DAR0)
Destination address register 1 (Addresses 1FD616 to 1FD416) (DAR1)
Destination address register 2 (Addresses 1FE616 to 1FE416) (DAR2)
Destination address register 3 (Addresses 1FF616 to 1FF416) (DAR3)
Functions
Bit
At reset
RW
23 to 0 Need not to be set.
[Read]
After transfer starts, the read value indicates the
destination address of data which is next transferred.
Undefined
RW
b23
b16
b7
b0
b15
b8
Transfer counter register 0 (Addresses 1FCA16 to 1FC816) (TCR0)
Transfer counter register 1 (Addresses 1FDA16 to 1FD816) (TCR1)
Transfer counter register 2 (Addresses 1FEA16 to 1FE816) (TCR2)
Transfer counter register 3 (Addresses 1FFA16 to 1FF816) (TCR3)
Functions
Bit
At reset
RW
23 to 0 [Write]
Set the dummy data.
These bits can be set to “00000116” to “FFFFFF16.”
[Read]
After a value is written to this register and until
transfer starts, the read value indicates the written
value (dummy data).
After transfer starts, the read value indicates the
remaining byte number of the block which is being
transferred.
Undefined
RW
Note: When writing to this register, write to all 24 bits.
Do not write “00000016” to this register.
b23
b16
Fig. 13.8.1 Register structures of SARi, DARi, and TCRi in link array chain transfer mode