MB81EDS516445 Datasheet, PDF (17/52 Pages) Fujitsu Component Limited. – 512M Bit (4 bank x 2M word x 64 bit) Consumer Applications Specific Memory for SiP

MB81EDS516445
(Continued)
Current State CS RAS CAS WE
Address
Command
Function
Bank
Activating
HXXX
X
L HHH
X
DESL
NOP
NOP
L HH L
X
BST
L H L H BA, CA, AP READ/READA
L H L L BA, CA, AP WRIT/WRITA Illegal *²
L LHH
BA, RA
ACT
L LHL
BA, AP
PRE/PALL
L L LH
LLLL
X
MODE
REF/SELF
MRS
Illegal
Refreshing/
HXXX
X
Mode Register
Setting
L HHH
X
L HH L
X
DESL
NOP
BST
NOP
LHLX
X
READ/READA/
WRIT/WRITA Illegal
L LXX
X
ACT/PRE/PALL/
REF/SELF/MRS
RA = Row Address
BA = Bank Address
CA = Column Address AP = Auto Precharge
Note: Assuming CKE = H during the previous clock cycle and the current clock cycle. After illegal commands are
asserted, following command and stored data should not be guaranteed.
*1: Illegal to bank in the specified state. Command entry may be legal depending on the state of bank selected by BA.
*2: NOP to bank in precharging or in idle state. Bank in active state may be precharged depending on BA.
*3: Illegal if any bank is not idle.
*4: MRS command should be issued on condition that all DQ are in High-Z.
*5: Requires appropriate DM masking.
DS05-11464-1E
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