![Samsung S3C2451X Скачать руководство пользователя страница 132](http://html.mh-extra.com/html/samsung/s3c2451x/s3c2451x_user-manual_340826132.webp)
Preliminary
STATIC MEMORY CONTROLLER
S3C2451X RISC MICROPROCESSOR
5-20
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.
SMC CONTROL REGISTER
Register Address
R/W
Description
Reset
Value
SMCCR
0x4F000204
R/W
SMC control register
0x3
Bit
Description
Initial
State
[31:2]
Read undefined. Write as zero.
0x0
MemClkRatio
[1]
Defines the ratio of SMCLK to HCLK:
0: SMCLK = HCLK.
1: SMCLK = HCLK/2.
0x1
SMClockEn [0]
SMCLK
enable:
0: Clock only active during memory accesses.
1: Clock always running.
Clock stopping saves power by stopping SMCLK when it is
not required. If clock stopping is enabled before the memory
access, the SMC stops SMCLK on the following conditions:
• asynchronous read access to asynchronous memory
• asynchronous write access to asynchronous memory
• asynchronous read access to synchronous memory
• asynchronous write access to synchronous memory.
0x1