參數(shù)資料
型號(hào): 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(nèi)存
文件頁(yè)數(shù): 51/96頁(yè)
文件大?。?/td> 2153K
代理商: HYB18T512800AC-5
HYB18T512[400/800/160]A[C/F]–[3.7/5]
512-Mbit Double-Data-Rate-Two SDRAM
Functional Description
Data Sheet
51
Rev. 1.13, 2004-05
09112003-SDM9-IQ3P
2.7.2
Minimum Write to Precharge command spacing to the
same bank = WL + BL/2 +
t
WR
. For write cycles, a delay
must be satisfied from the completion of the last burst
write cycle until the Precharge command can be
issued. This delay is known as a write recovery time
(
t
WR
) referenced from the completion of the burst write
Write followed by Precharge
to the Precharge command. No Precharge command
should be issued prior to the
t
WR
delay, as DDR2
SDRAM does not support any burst interrupt by a
Precharge command.
t
WR
is an analog timing
parameter (see
Chapter 7
) and is not the programmed
value for
t
WR
in the MRS.
Figure 44
Write followed by Precharge Example 1: WL = (RL - 1) = 3, BL = 4,
t
WR
= 3
Figure 45
Write followed by Precharge Example 2: WL = (RL - 1) = 4, BL = 4,
t
WR
= 3
NOP
NOP
NOP
NOP
NOP
W RITE A
Post CAS
T0
T2
T1
T3
T4
T5
T6
T7
T8
WL = 3
BW-P3
CMD
DQ
NOP
DIN A0 DIN A1 DIN A2 DIN A3
tW R
Completion of
the Burst Write
Precharge
A
NOP
DQS,
DQS
CK, CK
NOP
NOP
NOP
NOP
NOP
W RITE A
Post CAS
T0
T2
T1
T3
T4
T5
T6
T7
T9
WL = 4
BW-P4
CMD
DQ
NOP
DIN A0 DIN A1 DIN A2 DIN A3
tW R
Completion of
the Burst Write
Precharge
A
NOP
DQS,
DQS
CK, CK
相關(guān)PDF資料
PDF描述
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HYB18T512800AF-37 512-Mbit Double-Data-Rate-Two SDRAM
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