參數(shù)資料
型號(hào): DP8441
文件頁數(shù): 24/46頁
文件大小: 644K
代理商: DP8441
6.0 Refresh Modes
(Continued)
6.5 REFRESH TYPES
The DP8440/41 support RAS Only refresh and CAS-before-
RAS refresh. RAS only refresh can be programmed to be
staggered or non-staggered. Staggered refresh reduces
peak current requirements and system noise.
The DP8440/41 have a large enough refresh address coun-
ter for error scrubbing during refresh. If error scrubbing is
desired, the user must select the All RAS refresh option.
TL/F/11718–12
FIGURE 18. All RAS Refresh with 2Ts of RAS Low and Precharge.
All RAS refresh must be programmed when doing Error Scrubbing.
TL/F/11718–13
FIGURE 19. Staggered Refresh with 2Ts RAS low and Precharge.
Staggered refresh is good for noise sensitive systems.
Clearing the Refresh Counter and Refresh Clock:
The
user can clear the refresh counter by pulsing RFSH low for
two clocks while DISRFSH is negated. If RFSH is kept as-
serted for 500 ns, the refresh clock will also be cleared.
TL/F/11718–34
24
相關(guān)PDF資料
PDF描述
DP84412J DRAM Controller
DP84412N DRAM Controller
DP8441VLJ DRAM Controller
DP84422BN DRAM Controller
DP84422J DRAM Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DP84412J 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DRAM Controller
DP84412J/A+ 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DRAM Controller
DP84412N 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DRAM Controller
DP84412N/A+ 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DRAM Controller
DP84412N/B+ 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DRAM Controller