MH4V64AXJJ View Datasheet(PDF) - MITSUBISHI ELECTRIC
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MH4V64AXJJ Datasheet PDF : 25 Pages
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MITSUBISHI LSIs
MH4V64/644AXJJ-5,-6,-5S,-6S
FAST PAGE MODE 268435456-BIT (4194304-WORD BY 64-BIT)DYNAMIC RAM
FUNCTION
The MH4V64/644AXJJ provide, in addition to
normal read, write, and read-modify-write
operations,
a number of other functions, e.g., Fast page mode,
/RAS-only refresh, and delayed-write. The input
conditions for each are shown in Table 1.
Table 1 Input conditions for each mode
Operation
Read
Write (Early write)
Write (Delayed write)
Read-modify-write
/RAS-only refresh
Hidden refresh
/CAS before /RAS refresh
Standby
Self refresh *
/RAS
ACT
ACT
ACT
ACT
ACT
ACT
ACT
NAC
ACT
/CAS
ACT
ACT
ACT
ACT
NAC
ACT
ACT
DNC
ACT
Inputs
/W
/OE
NAC ACT
ACT
ACT
ACT
DNC
NAC
NAC
DNC
DNC
ACT
DNC
ACT
DNC
DNC DNC
NAC DNC
Row Column
address address
APD APD
APD APD
APD APD
APD APD
APD DNC
APD DNC
DNC DNC
DNC DNC
DNC DNC
Input/Output
Input Output Refresh
OPN VLD YES
VLD
VLD
VLD
OPN
IVD
VLD
YES
YES
YES
DNC
OPN
DNC
OPN
VLD
OPN
YES
YES
YES
DNC OPN
DNC OPN
NO
YES
Remark
Fast page
mode
identical
Note : ACT : active, NAC : nonactive, DNC : don' t care, VLD : valid, IVD : Invalid, APD : applied, OPN : open
*MH4V64/644AXJJ-5S,-6S only
MIT-DS-0072-0.5
MITSUBISHI
ELECTRIC
( 8 / 25 )
26/Feb./1997
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