參數(shù)資料
型號: HYB18T512800AC-5
廠商: INFINEON TECHNOLOGIES AG
英文描述: M39012 MIL RF CONNECTOR
中文描述: 512兆雙數(shù)據(jù)速率2內存
文件頁數(shù): 44/96頁
文件大?。?/td> 2153K
代理商: HYB18T512800AC-5
T4
HYB18T512[400/800/160]A[C/F]–[3.7/5]
512-Mbit Double-Data-Rate-Two SDRAM
Functional Description
Data Sheet
44
Rev. 1.13, 2004-05
09112003-SDM9-IQ3P
Figure 32
Write followed by Burst Read Example: RL = 5 (AL = 2, CL = 3), WL = 4,
t
WTR
= 2, BL = 4
The minimum number of clocks from the write command to the read command is (CL - 1) +BL/2 +
t
WTR
, where
t
WTR
is the write-to-read turn-around time
t
WTR
expressed in clock cycles. The
t
WTR
is not a write recovery time (
t
WR
) but
the time required to transfer 4 bit write data from the input buffer into sense amplifiers in the array.
Figure 33
Seamless Write Operation Example 1: RL = 5, WL = 4, BL = 4
The seamless write operation is supported by enabling a write command every BL/2 number of clocks. This
operation is allowed regardless of same or different banks as long as the banks are activated.
NOP
NOP
NOP
NOP
NOP
READ A
Post CAS
BWBR
CMD
DQ
NOP
DIN A0 DIN A1 DIN A2 DIN A3
AL=2
tW TR
CL=3
NOP
NOP
T0
T2
T1
T3
T4
T5
T6
T7
T8
T9
W rite to Read = (CL - 1)+ BL/2 +tW TR(2) = 6
DQS,
DQS
W L = RL - 1 = 4
RL=5
CK, CK
NOP
NOP
NOP
NOP
NOP
NOP
NOP
DIN A0 DIN A1 DIN A2 DIN A3
W RITE A
Post CAS
W L = RL - 1 = 4
W RITE B
Post CAS
DIN B0 DIN B1 DIN B2 DIN B3
T0
T2
T1
T3
T5
T6
T7
T8
CMD
DQ
SBR
DQS,
DQS
CK, CK
相關PDF資料
PDF描述
HYB18T512800AC DDR2 Registered Memory Modules
HYB18T512800AF DDR2 Registered Memory Modules
HYB18T512800AF-37 512-Mbit Double-Data-Rate-Two SDRAM
HYB18T512800AF-5 512-Mbit Double-Data-Rate-Two SDRAM
HYB25D128160CE-5 128 Mbit Double Data Rate SDRAM
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