Preliminary
DMA CONTROLLER
S3C2451X RISC MICROPROCESSOR
9-6
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Transfer Size
•
There are two different transfer sizes; single and Burst 4.
•
DMA holds the bus firmly during the transfer of these chunk of data, thus other bus masters can not get the
bus.
Burst 4 Transfer Size
4 sequential Reads and 4 sequential Writes are performed in the Burst 4 Transfer.
NOTE:
Single Transfer size: One read and one write are performed.
XSCLK
XnXDREQ
XnXDACK
Read
Read
Read
Write
Write
Write
Read
Write
3 cycles
Double
synch
Figure 9-3. Burst 4 Transfer size