參數(shù)資料
型號: EDD51321CBH
廠商: Elpida Memory, Inc.
英文描述: 512M bits DDR SDRAM
中文描述: 512M比特DDR內(nèi)存
文件頁數(shù): 9/55頁
文件大?。?/td> 589K
代理商: EDD51321CBH
EDD51321CBH
Preliminary Data Sheet E1094E30 (Ver. 3.0)
9
Timing Parameter Measured in Clock Cycle
Number of clock cycle
tCK
6.0ns
7.5ns
Parameter
Symbol
min.
max.
min.
max.
Unit
Write to pre-charge command delay
(same bank)
Read to pre-charge command delay
(same bank)
Write to read command delay
(to input all data)
Burst stop command to write command
delay
(CL = 3)
Burst stop command to DQ high-Z
(CL = 3)
Read command to write command delay
(to output all data)
(CL = 3)
Pre-charge command to high-Z
(CL = 3)
tWPD
4 + BL/2
3 + BL/2
tCK
tRPD
BL/2
BL/2
tCK
tWRD
3 + BL/2
2 + BL/2
tCK
tBSTW
3
3
tCK
tBSTZ
3
3
tCK
tRWD
3 + BL/2
3 + BL/2
tCK
tHZP
3
3
tCK
Write command to data in latency
tWCD
1
1
tCK
Write recovery
tWR
3
2
tCK
DM to data in latency
tDMD
0
0
tCK
Mode register set command cycle time
tMRD
2
2
tCK
Self-refresh exit to non-column command tSREX
20
16
tCK
Auto-refresh period
tRFC
18
15
tCK
Power-down entry
tPDEN
2
1
tCK
Power-down exit to command input
tPDEX
1
1
tCK
CKE minimum pulse width
tCKE
2
2
tCK
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