UM_S3C2501X Datasheet, PDF (268/465 Pages) Samsung semiconductor – 32-BIT RISC MICROPROCESSOR

S3C2501X
MEMORY CONTROLLER
5.7.9.4 Write Buffer Time-out Register
The write buffer time-out register works with the merging write buffer (if write buffer is enabled). This 16-bit
read/write field of register sets the cycles for a forced flush of the write buffer.
Registers
WBTOREG
Table 5-28. SDRAM Write Buffer Time-out Register
Address
0xF002000C
R/W
R/W
Description
Write buffer time-out register
Reset value
0x00000000
WBTOREG
WBTO
Bit
[15:0]
[31:16]
Description
Write buffer time-out delay time
Reserved
R/W
R/W
–
Default value
0x00000000
A write to a merging write buffer loads the value in the timeout register into the time-out down counter of the
buffer. When the time-out counter reaches 0 the merging write buffer contents is written(flushed) to the external
memory. The down counter is clocked by system bus clock. Storing a value of 0 in the timeout register disables
the write buffer timeout function.
31
16 15
0
RESERVED
WBTO
[15:0] Write buffer time-out delay time:
[31:16] Reserved
Figure 5-26. SDRAM Write Buffer Time-out Register
5-53