參數(shù)資料
型號(hào)： MC-42S8LFG64S
廠商： NEC Corp.
英文描述： 8 M-Word By 64-Bit Synchronous Dynamic RAM Module(同步動(dòng)態(tài)RAM 模塊)
中文描述： 八米，由64個(gè)字位同步動(dòng)態(tài)隨機(jī)存儲(chǔ)器模塊（同步動(dòng)態(tài)內(nèi)存模塊）
文件頁(yè)數(shù)： 24/32頁(yè)
文件大小： 267K
代理商： MC-42S8LFG64S
24
MC-42S8LFG64S
/CAS Before /RAS Self Refresh Cycle
Remark
Address, /OE : Don't care DQ : Hi-Z
Cautions on Use of /CAS before /RAS Self Refresh
/CAS before /RAS self refresh can be used independently when used in combination with distributed /CAS before
/RAS long refresh; However, when used in combination with burst /CAS before /RAS long refresh or with long /RAS
only refresh (both distributed and burst), the following cautions must be observed.
(1) Normal Combined Use of /CAS Before /RAS Self Refresh and Burst /CAS Before /RAS Long Refresh
When
/CAS before /RAS self refresh and burst /CAS before /RAS long refresh are used in combination, please
perform /CAS before /RAS refresh 4,096 times within a 64 ms interval just before and after setting /CAS before
/RAS self refresh.
(2) Normal Combined Use of /CAS Before /RAS Self Refresh and Long /RAS Only Refresh
When
/CAS before /RAS self refresh and /RAS only refresh are used in combination, please perform /RAS only
refresh 4,096 times within a 64 ms interval just before and after setting /CAS before /RAS self refresh.
(3)
If t
RASS(MIN.)
is not satisfied at the beginning of /CAS before /RAS self refresh cycles (t
RAS
<
100
μ
s), /CAS before
/RAS refresh cycles will be executed one time.
If 10
μ
s < t
RAS
< 100
μ
s, /RAS precharge time for /CAS before /RAS self refresh (t
RPS
) is applied.
And refresh cycles (4,096 / 128 ms) should be met.
For details, please refer to
How To Use DRAM User’s Manual.
t
CSR
t
WSR
t
WHR
t
RASS
t
RPS
t
CHS
t
CPN
t
RPC
t
CRP
/RAS
V
IH
V
IL
/CAS
V
IH
V
IL
/WE
V
IH
V
IL
相關(guān)PDF資料
PDF描述
MC-4516CA726EF-A10 16M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE
MC-4516CB646 16M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE
MC-4516CB647 16M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE
MC-4516CA726 16M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE
MC-4516CA727 16M-WORD BY 72-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE
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