Samsung S3C6400X User Manual page 892

HSMMC CONTROLLER
Using DMA
START
(1)
Set System Address Reg
(2)
Set Block Size Reg
(3)
Set Block Count Reg
(4)
Set Argument Reg
(5)
Set Transfer Mode Reg
(6)
Set Command Reg
(7)
Wait for Command
Complete Int
Command Complete Int occur
(8)
Clr Command Complete
Status
(9)
Get Response Data
Figure 27-12. 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.
(4) Set the value corresponding to the issued command in the Argument register.
(5) Set the values for Multi / Single Block Select and Block Count Enable.
And 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.
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
27-16
Specifications and information herein are subject to change without notice.
S3C6400X RISC MICROPROCESSOR
(10)
Wait for Transfer
Complete Int and DMA Int
(11)
Check Interrupt Status
DMA Int occur
(12)
Clr DMA Status Interrupt
(13)
Set System Address Reg
Transfer Complete Int
occur
(14)
Clr Transfer Complete status
Clr DMA Interrupt status
END