Samsung S3C2451X User Manual page 488

HSMMC CONTROLLER
0000h = No data transfer
BLOCK COUNT REGISTER
This register is used to configure the number of data blocks.
Register
BLKCNT0 0X4AC00006
BLKCNT1 0X4A800006
Name Bit
BLKCNT [15:0]
Blocks Count For Current Transfer
register is set to 1 and is valid only for multiple block transfers. The Host Driver
shall set this register to a value between 1 and the maximum block count. The
Host Controller decrements the block count after each block transfer and stops
when the count reaches zero. Setting the block count to 0 results in no data
blocks being transferred.
This register should be accessed only when no transaction is executing (i.e., after
transactions are stopped). During data transfer, read operations on this register
may return an invalid value and write operations are ignored. When saving
transfer context as a result of a Suspend command, the number of blocks yet to
be transferred can be determined by reading this register. When restoring transfer
context prior to issuing a Resume command, the Host Driver shall restore the
previously saved block count.
FFFFh = 65535 blocks
... ...
0002h = 2 blocks
0001h = 1 block
0000h = Stop Count
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
21-20
Specifications and information herein are subject to change without notice.
Address R/W
R/W
R/W
This register is enabled when Block Count Enable in the Transfer Mode
Description
Blocks Count For Current Transfer (Channel 0)
Blocks Count For Current Transfer (Channel 1)
Description
S3C2451X RISC MICROPROCESSOR
Reset Value
0x0
0x0
Initial
Value
0