Preliminary
S3C2451X RISC MICROPROCESSOR
STATIC MEMORY CONTROLLER
5-15
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
BANK WRITE WAIT STATE CONTROL REGISTERS 0-5
Register Address
R/W
Description
Reset
Value
SMBWSTWRR0
0x4F000008
R/W
Bank0 write wait state control register
0x1F
SMBWSTWRR1
0x4F000028
R/W
Bank1 write wait state control register
0x1F
SMBWSTWRR2
0x4F000048
R/W
Bank2 write wait state control register
0x1F
SMBWSTWRR3
0x4F000068
R/W
Bank3 write wait state control register
0x1F
SMBWSTWRR4
0x4F000088
R/W
Bank4 write wait state control register
0x1F
SMBWSTWRR5
0x4F0000A8
R/W
Bank5 write wait state control register
0x1F
Bit
Description
Initial
State
[31:5]
Read undefined. Write as zero.
0x0
WSTWR
[4:0]
Write wait state. Defaults to 11111 at reset.
For SRAM , the WSTWR field controls the number of wait states
for write accesses, and the external wait assertion timing for
writes.
Wait state time = WSTWR x SMCLK period
WSTWR does not apply to read-only devices such as ROM.
0x1F
BANK OUTPUT ENABLE ASSERTION DELAY CONTROL REGISTERS 0-5
Register Address
R/W
Description
Reset
Value
SMBWSTOENR0
0x4F00000C R/W Bank0 output enable assertion delay control register
0x2
SMBWSTOENR1
0x4F00002C R/W Bank1 output enable assertion delay control register
0x2
SMBWSTOENR2
0x4F00004C R/W Bank2 output enable assertion delay control register
0x2
SMBWSTOENR3
0x4F00006C R/W Bank3 output enable assertion delay control register
0x2
SMBWSTOENR4
0x4F00008C R/W Bank4 output enable assertion delay control register
0x2
SMBWSTOENR5 0x4F0000A
C
R/W Bank5 output enable assertion delay control register
0x2
Bit
Description
Initial
State
[31:4]
Read undefined. Write as zero.
0x0
WSTOEN
[3:0]
Output enable assertion delay from chip select assertion.
Default to 0x2 at reset
0x2
NOTE
: If you would use a muxed OneNAND, the regiseter value of WSTOEN should be larger than 2.