MB81EDS516545_10 Datasheet, PDF (14/60 Pages) Fujitsu Component Limited. – 512M Bit (4 bank x 2M word x 64 bit) Consumer Applications Specific Memory for SiP

MB81EDS516545
2) CKE Command Truth Table
Command
SELF REFRESH ENTRY *¹
CKE
Symbol
CS RAS CAS WE BA A [12:0] SA
n-1 n
SELF H L L L L H X
X
SELF REFRESH EXIT *²
POWER DOWN ENTRY *¹
POWER DOWN EXIT
L HHHX
X
SELFX L H
HXXXX
X
L HHHX
X
PD
HL
HXXXX
X
L
L HHHX
X
PDX L H
HXXXX
X
DEEP POWER DOWN ENTRY *¹
DPD H L L H H L X
X
DEEP POWER DOWN EXIT
L HHHX
X
DPDX L H
HXXXX
X
Note: V = Valid, L = VIL, H = VIH, X can be either VIL or VIH
*1: SELF and DPD commands can be issued after all banks have been precharged and all DQ are in High-Z.
*2: CKE should be held high more than tREFC period after SELFX.
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DS05-11463-2E