EM44BM1684LBB Datasheet, PDF (16/29 Pages) Eorex Corporation – 512Mb (8M×4Bank×16) Double DATA RATE 2 SDRAM

eorex
EM44BM1684LBB
3. Operative Command Table (Continued)
Current
State
/CS /R /C /W
Addr.
Command
Action
H XX X
X
DESL
NOP(Continue burst to end)
L HH H
X
NOP
NOP(Continue burst to end)
Read with
AP
L H H L BA/CA/A10
TERM
ILLEGAL
L HL X
BA/RA READ/WRITE ILLEGAL ^{(Note 1)}
L L H H BA/A10
ACT
ILLEGAL ^{(Note 1)}
L LH L
X
PRE/PREA ILLEGAL ^{(Note 1)}
L LLH
X
REFA
ILLEGAL
L
L
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
H XX X
X
DESL
NOP(Continue burst to end)
L HH H
X
NOP
NOP(Continue burst to end)
L HH L
X
TERM
ILLEGAL
L H L X BA/CA/A10 READ/WRITE ILLEGAL ^{(Note 1)}
Write with AP _{L L H H BA/RA}
ACT
ILLEGAL ^{(Note 1)}
L L H L BA/A10
PRE/PREA ILLEGAL ^{(Note 1)}
L LLH
X
REFA
ILLEGAL
L
L
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
H XX X
X
DESL
NOP(idle after t_RP)
L HH H
X
NOP
NOP(idle after t_RP)
L HH L
X
TERM
NOP
L H L X BA/CA/A10 READ/WRITE ILLEGAL ^{(Note 1)}
Pre-charging _{L L H H}
L LH L
L LLH
BA/RA
BA/A10
X
ACT
PRE/PREA
REFA
ILLEGAL ^{(Note 1)}
NOP(idle after t_RP) ^{(Note 3)}
ILLEGAL
L
L
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
Row
Activating
H XX X
X
DESL
NOP(Row active after t_RCD)
L HH H
X
NOP
NOP(Row active after t_RCD)
L HH L
X
TERM
NOP
L H L X BA/CA/A10 READ/WRITE ILLEGAL ^{(Note 1)}
L L H H BA/RA
ACT
ILLEGAL ^{(Note 1)}
L L H L BA/A10
PRE/PREA ILLEGAL ^{(Note 1)}
L LLH
X
REFA
ILLEGAL
L
L
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
Remark H = High level, L = Low level, X = High or Low level (Don't care), AP = Auto Pre-charge
Jan. 2008
16/29
www.eorex.com