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(nèi)存
文件頁數(shù): 64/96頁
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
64
Rev. 1.13, 2004-05
09112003-SDM9-IQ3P
2.13
Asynchronous CKE Low Reset Event
In a given system, Asynchronous Reset event can
occur at any time without prior knowledge. In this
situation, memory controller is forced to drop CKE
asynchronously low, immediately interrupting any valid
operation. DRAM requires CKE to be maintained “high”
for all valid operations as defined in this data sheet. If
CKE asynchronously drops “l(fā)ow” during any valid
operation, the DRAM is not guaranteed to preserve the
contents of the memory array. If this event occurs, the
memory controller must satisfy a time delay (
t
delay
)
before turning off the clocks. Stable clocks must exist at
the input of DRAM before CKE is raised “high” again.
The DRAM must be fully re-initialized as described the
initialization sequence (section 2.2.1, step 4 thru 13).
DRAM is ready for normal operation after the
initialization sequence. See
Chapter 7
.
Figure 62
Asynchronous Low Reset Event
CKE
CKE drops low due to an
asynchronous reset event
Clocks can be turned off after
this point
tdelay
CK, CK
stable clocks
相關(guān)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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