參數(shù)資料
型號: EP9302-IQZ
廠商: Cirrus Logic, Inc.
英文描述: High-speed ARM9 System-on-chip Processor with MaverickCrunch
中文描述: 高速ARM9的系統(tǒng)級芯片處理器MaverickCrunch
文件頁數(shù): 14/42頁
文件大?。?/td> 302K
代理商: EP9302-IQZ
14
Copyright 2005 Cirrus Logic (All Rights Reserved)
DS653PP3
EP9302
High-speed ARM9 System-on-chip Processor with MaverickCrunch
Memory Interface
SDRAM Load Mode Register Cycle
Figure 2
through
Figure 5
define the timings associated with all phases of the SDRAM. The following table contains the
values for the timings of each of the SDRAM modes.
Parameter
Symbol
Min
Typ
Max
Unit
SDCLK high time
t
clk_high
-
(t
HCLK
) / 2
-
ns
SDCLK low time
t
clk_low
-
(t
HCLK
) / 2
-
ns
SDCLK rise/fall time
t
clkrf
-
2
4
ns
Signal delay from SDCLK rising edge time
t
d
-
-
8
ns
Signal hold from SDCLK rising edge time
t
h
1
-
-
ns
DQMn delay from SDCLK rising edge time
t
DQd
-
-
8
ns
DQMn hold from SDCLK rising edge time
t
DQh
1
-
-
ns
DA valid setup to SDCLK rising edge time
t
DAs
2
-
-
ns
DA valid hold from SDCLK rising edge time
t
DAh
3
-
-
ns
Figure 2. SDRAM Load Mode Register Cycle Timing Measurement
SDCLK
SDCSn
RASn
CASn
SDWEn
DQMn
AD
DA
OP-Code
t
clk_high
t
clk_low
t
clkrf
t
d
t
h
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