S3C3410X Datasheet, PDF (187/314 Pages) Samsung semiconductor – 16-Bit CMOS Microcontrollers

S3C3410X RISC MICROPROCESSOR
DMA
DMA SOURCE/DESTINATION ADDRESS REGISTER
These registers contain the 27-bit source/destination address of a DMA channel. Depending on the setting of the
DMA control register (DMACONx), these addresses will be increased/decreased or will be fixed without changing.
Register
DMASRC0
DMADST0
DMASRC1
DMADST1
Offset
Address
0x3000
0x3004
0x4000
0x4004
R/W
Description
R/W DMA 0 source address register
R/W DMA 0 destination address register
R/W DMA 1 source address register
R/W DMA 1 destination address register
Reset
Value
0x0
0x0
0x0
0x0
DMASRC0
Bit
[26:0]
Description
Initial source address for DMA0
Initial State
0x0
DMASRC1
Bit
[26:0]
Description
Initial source address for DMA1
Initial State
0x0
DMADST0
Bit
[26:0]
Description
Initial destination address for DMA0
Initial State
0x0
DMADST1
Bit
[26:0]
Description
Initial destination address for DMA1
Initial State
0x0
DMA TRANSFER COUNT REGISTER
These registers contain the 26-bit count value which is the number of DMA transfer. This value is decreased by 1
when one DMA operation is completed regardless of the width of the data which should be transferred. If the
DMA operates 4 burst mode, the DMACNT is decreased by 1 when 4 data transfer is completed
Register
DMACNT0
DMACNT1
Offset
Address
0x3008
0x4008
R/W
Description
R/W DMA transfer count register for DMA0
R/W DMA transfer count register for DMA1
Reset
Value
0x0
0x0
DMACNT0,1
Bit
[26:0]
Description
Number of DMA transfer
Initial State
0x0
6-9