參數(shù)資料
型號(hào): CL-PS7110-VI-A
廠商: CIRRUS LOGIC INC
元件分類: 微控制器/微處理器
英文描述: Low-Power System-on-a-Chip
中文描述: MROM, RISC MICROCONTROLLER, PQFP208
封裝: VQFP-208
文件頁(yè)數(shù): 68/82頁(yè)
文件大?。?/td> 1101K
代理商: CL-PS7110-VI-A
DATA BOOK v1.5
May 1997
68
ELECTRICAL SPECIFICATIONS
CL-PS7110
Low-Power System-on-a-Chip
Figure 4-6. DRAM CAS-Before-RAS Refresh Cycle
NOTES:
1)
t
CSA
(CAS set-up time) = 25 ns minimum at MCLK = 18.432 MHz
t
RAS
(RAS pulse width) = 80 ns minimum at MCLK = 18.432 MHz
t
RC
(cycle time) = 160 ns minimum at MCLK = 18.432 MHz
When DRAMs are placed in self-refresh (entering standby) the same timings apply, but t
RAS
is extended
indefinitely.
2)
3)
4)
HELD
CAS[3:0]
D[31:0]
NMOE
DRA[12:0]
RAS[3:0]
DRAM CAS-before-RAS refresh cycle (MCLK shown for reference only)
t
RAS
MCLK
ROW
COL
t
CSA
NMWE
HELD
t
RC
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