EM48BM1684LBA Datasheet, PDF (16/19 Pages) Eorex Corporation – 512Mb (8M×4Bank×16) Synchronous DRAM

eorex
EM48BM1684LBA
4. Operative Command Table (Continued) ^{(Note 7)}
Current
State
/CS /R /C /W
Addr.
Command
Action
H XX X
X
DESL
Continue burst to end →
Pre-charging
L HH H
X
NOP
Continue burst to end →
Pre-charging
Read with
AP
L HH L
X
BST
ILLEGAL
L H L H BA/CA/A10 READ/READA ILLEGAL ^{(Note 9)}
L H L L BA/CA/A10 WRIT/WRITA ILLEGAL ^{(Note 9)}
L L H H BA/RA
ACT
ILLEGAL ^{(Note 9)}
L L H L BA, A10
PRE/PALL ILLEGAL ^{(Note 9)}
L LLH
X
REF/SELF ILLEGAL
L L L L Op-Code
MRS
ILLEGAL
H XX X
X
DESL
Burst to end → Write recovering
with auto pre-charge
L HH H
X
NOP
Continue burst to end → Write
recovering with auto pre-charge
Write with
AP
L HH L
X
BST
ILLEGAL
L H L H BA/CA/A10 READ/READA ILLEGAL ^{(Note 9)}
L H L L BA/CA/A10 WRIT/WRITA ILLEGAL ^{(Note 9)}
L L H H BA/RA
L L H L BA, A10
ACT
PRE/PALL
ILLEGAL ^{(Note 9)}
ILLEGAL ^{(Note 9)}
L LLH
X
REF/SELF ILLEGAL
L L L L Op-Code
MRS
ILLEGAL
H XX X
X
DESL
Nop → Enter idle after t_RP
L HH H
X
NOP
Nop → Enter idle after t_RP
L HH L
X
BST
ILLEGAL
L H L H BA/CA/A10 READ/READA ILLEGAL ^{(Note 9)}
Pre-charging L H L L BA/CA/A10 WRIT/WRITA _ILLEGAL ^{(Note 9)}
L L H H BA/RA
ACT
ILLEGAL ^{(Note 9)}
L L H L BA, A10
L LLH
X
PRE/PALL
REF/SELF
Nop → Enter idle after t_RP
ILLEGAL
L L L L Op-Code
MRS
ILLEGAL
Row
Activating
H XX X
X
DESL
Nop → Enter idle after t_RCD
L HH H
X
NOP
Nop → Enter idle after t_RCD
L HH L
X
BST
ILLEGAL
L H L H BA/CA/A10 READ/READA ILLEGAL ^{(Note 9)}
L H L L BA/CA/A10 WRIT/WRITA ILLEGAL ^{(Note 9)}
L L H H BA/RA
ACT
ILLEGAL ^{(Note 9, 16)}
L L H L BA, A10
PRE/PALL ILLEGAL ^{(Note 9)}
L LLH
X
REF/SELF ILLEGAL
L L L L Op-Code
MRS
ILLEGAL
Remark H = High level, L = Low level, X = High or Low level (Don't care), AP = Auto Pre-charge
Jul. 2006
16/19
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