參數(shù)資料
型號(hào)： MH1V36CAM-7
廠商： Mitsubishi Electric Corporation
英文描述： FAST PAGE MODE 37748736-BIT ( 1048576-WORD BY 36-BIT ) DYNAMIC RAM
中文描述： 快速頁(yè)面模式37748736位（1048576 - Word的36位）動(dòng)態(tài)隨機(jī)存儲(chǔ)器
文件頁(yè)數(shù)： 6/18頁(yè)
文件大?。?/td> 190K
代理商： MH1V36CAM-7
MITSUBISHI
ELECTRIC
( 6
FAST PAGE MODE 37748736-BIT ( 1048576-WORD BY 36-BIT ) DYNAMIC RAM
MH1V36CAM-6,-7
MITSUBISHI LSIs
Preliminary Spec.
Some of contents are subject to change without notice.
MIT-DS-0027-0.0
21 May 1996
Read-Write and Read-Modify-Write Cycles
Note 21: t
RWC
is specified as t
RWC(min)
=t
RAC(max)
+t
ODD(min)
+t
RWL(min)
+t
RP(min)
+5t
T.
22: t
WCS
, t
CWD
,t
RWD
and t
AWD
and,t
CPWD
are specified as reference points only. If t
WCS
≥
t
WCS(min)
the cycle is an early write cycle and the
DQ pins will remain high impedance throughout the entire cycle. If t
CWD
≥
t
CWD(min),
t
RWD
≥
t
RWD (min),
t
AWD
≥
t
AWD(min)
and t
CPWD
≥
t
CPWD(min)
(for fast page mode cycle only), the cycle is a read-modify-write cycle and the DQ will contain the data read from the selected address.
If neither of the above condition (delayed write) of the DQ (at access time and until CAS or OE goes back to V
IH
) is indeterminate.
ü
Fast-Page Mode Cycle (Read, Early Write, Read -Write, Read-Modify-Write Cycle)
(Note 23)
Limits
Parameter
Read write/read modify write cycle time
RAS low pulse width
CAS low pulse width
CAS hold time after RAS low
RAS hold time after CAS low
Read setup time before CAS low
Delay time, CAS low to W low
Delay time, RAS low to W low
Delay time, address to W low
CAS hold time after W low
RAS hold time after W low
Symbol
t
RWC
t
RAS
t
CAS
t
CSH
t
RSH
t
RCS
t
CWD
t
RWD
t
AWD
t
CWL
t
RWL
t
WP
t
DS
t
DH
t
OEH
Unit
Min
155
105
Max
Min
180
Max
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
(Note21)
(Note22)
(Note22)
(Note22)
60
0
40
85
55
60
15
15
10
70
0
45
95
60
120
70
120
20
20
15
Write pulse width
Data setup time ü
Data hold time a
OE hold time after W low
0
0
15
20
10
15
10000
10000
10000
10000
105
Note 23: All previously specified timing requirements and switching characteristics are applicable to their respective fast page mode cycle.
24: t
RAS(min)
is specified as two cycles of CAS input are performed.
25: t
CP(max)
is specified as a reference point only.
Limits
Parameter
Fast page mode read/write cycle time
RAS low pulse width for read write cycle
CAS high pulse width
RAS hold time after CAS precharge
Symbol
t
PC
t
PRWC
t
RAS
t
CP
t
CPRH
t
CPWD
Unit
Min
40
85
Max
Min
45
95
Max
ns
ns
ns
ns
ns
ns
(Note24)
(Note25)
Delay time, CAS precharge to W low
(Note22)
Fast page mode read write/read modify write cycle time
35
60
100
10
15
100000
40
65
115
10
15
100000
CAS before RAS Refresh Cycle
(Note 26)
Limits
Parameter
CAS setup time before RAS low
CAS hold time after RAS low
Symbol
t
CSR
t
CHR
t
RSR
t
RHR
t
CAS
Unit
Min
10
10
Max
Min
10
15
Max
ns
ns
ns
ns
ns
Read setup time before RAS low
Read hold time after RAS low
CAS low pulse width
10
10
25
10
15
30
Note 26: Eight or more CAS before RAS cycles instead of eight RAS cycles are necessary for proper operation of CAS before RAS refresh
mode.
-6
-7
-6
-7
-6
-7
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