M2S56D40ATP-75L 查看數據表（PDF） - MITSUBISHI ELECTRIC
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M2S56D40ATP-75L Datasheet PDF : 37 Pages
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DDR SDRAM (Rev.1.0)
Jul. '01 Preliminary
MITSUBISHI LSIs
M2S56D20/ 30/ 40AKT
256M Double Data Rate Synchronous DRAM
FUNCTION TRUTH TABLE (continued)
Current State /CS /RAS /CAS /WE Address
Command
REFRESHING H X X X X
DESEL
L H H HX
NOP
L H H L BA
TERM
LH
L X BA, CA, A10 READ / WRITE
L L H H BA, RA
ACT
L L H L BA, A10
PRE / PREA
LL
L HX
REFA
LL
L
L Op-Code, Mode- MRS
Add
MODE
HX
REGISTER L H
X XX
H HX
DESEL
NOP
SETTING
LH
H
L BA
TERM
LH
L X BA, CA, A10 READ / WRITE
LL
H H BA, RA
ACT
LL
H
L BA, A10
PRE / PREA
LL
L HX
REFA
LL
Op-Code, Mode-
LL
MRS
Add
Action
NOP (Idle after tRC)
NOP (Idle after tRC)
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
NOP (Row Active after tRSC)
NOP (Row Active after tRSC)
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
Notes
ABBREVIATIONS:
H=High Level, L=Low Level, X=Don't Care
BA=Bank Address, RA=Row Address, CA=Column Address, NOP=No Operation
NOTES:
1. All entries assume that CKE was High during the preceding clock cycle and the current clock cycle.
2. ILLEGAL to bank in specified state; function may be legal in the bank indicated by BA, depending on the state of
that bank.
3. Must satisfy bus contention, bus turn around, write recovery requirements.
4. NOP to bank precharging or in idle state. May precharge bank indicated by BA.
5. ILLEGAL if any bank is not idle.
6. Refer to Read with Auto -Precharge in page 24.
7. Refer to Write with Auto-Precharge in page 26.
ILLEGAL = Device operation and/or data-integrity are not guaranteed.
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