Samsung S3C6400X User Manual page 898

HSMMC CONTROLLER
0003h = 3 Bytes
0002h = 2 Bytes
0001h = 1 Byte
0000h = No data transfer
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
27-22
Specifications and information herein are subject to change without notice.
S3C6400X RISC MICROPROCESSOR