Samsung S5PC100 User Manual page 950

S5PC100 USER'S MANUAL (REV1.0) SD/MMC CONTROLLER
4.13 USING DMA
Figure 8.12-12 Transaction Control with Data Transfer Using DAT Line Sequence (Using DMA)
(1) Set the system address for DMA in the System Address register.
(2) Set the value corresponding to the executed data byte length of one block in the Block Size register.
(3) Set the value corresponding to the executed data block count in the Block Count register (BLKCNT).
(4) Set the value corresponding to the issued command in the Argument register (ARGUMENT).
(5) Set the values for Multi / Single Block Select and Block Count Enable.
At this time, set the value corresponding to the issued command for Data Transfer Direction, Auto CMD12 Enable
and DMA Enable.
(6) Set the value corresponding to the issued command in the Command register (CMDREG).
NOTE: If the upper byte is written in the Command register, it issues a SD command and DMA is started.
8.12-15