IS42S81600D, IS42S16800D
FUNCTIONAL TRUTH TABLE Continued:
Current State
CS
RAS CAS WE
Address
Command
Action
Read with auto
Precharging
H
×
×
×
×
DESL
Continue burst to end, Precharge
L
L
L
L
L
L
L
L
H
H
H
H
H
L
H
H
L
H
L
x
NOP
Continue burst to end, Precharge
ILLEGAL
ILLEGAL (11)
ILLEGAL (11)
ILLEGAL (3)
×
BST
H
L
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
×
READ/READA
WRIT/WRITA
ACT
L
H
H
L
H
L
L
PRE/PALL
REF/SELF
MRS
ILLEGAL (11)
L
H
L
ILLEGAL
L
L
OC, BA
×
ILLEGAL
Write with Auto
Precharge
×
×
×
DESL
Continue burst to end, Write
recovering with auto precharge
L
H
H
H
×
NOP
Continue burst to end, Write
recovering with auto precharge
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
H
H
L
H
L
L
×
BST
ILLEGAL
ILLEGAL(11)
ILLEGAL (11)
ILLEGAL (3,11)
H
L
BA, CA, A10
READ/READA
WRIT/WRITA
ACT
L
BA, CA, A10
H
H
L
H
L
BA, RA
L
BA, A10
PRE/PALL
REF/SELF
MRS
ILLEGAL (3,11)
L
H
L
×
ILLEGAL
L
L
OC, BA
ILLEGAL
Precharging
×
H
H
H
H
L
×
H
H
L
×
H
L
×
DESL
Nop, Enter idle after tRP
Nop, Enter idle after tRP
Nop, Enter idle after tRP
ILLEGAL (3)
ILLEGAL (3)
ILLEGAL(3)
×
NOP
×
BST
H
L
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
×
READ/READA
WRIT/WRITA
ACT
L
H
H
L
H
L
L
PRE/PALL
REF/SELF
MRS
Nop Enter idle after tRP
ILLEGAL
L
H
L
L
L
OC, BA
×
ILLEGAL
Row Activating
×
H
H
H
H
L
×
H
H
L
×
H
L
DESL
Nop, Enter bank active after tRCD
Nop, Enter bank active after tRCD
Nop, Enter bank active after tRCD
ILLEGAL (3)
ILLEGAL (3)
ILLEGAL (3,9)
×
NOP
×
BST
H
L
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
×
READ/READA
WRIT/WRITA
ACT
L
H
H
L
H
L
L
PRE/PALL
REF/SELF
MRS
ILLEGAL (3)
L
H
L
ILLEGAL
L
L
OC, BA
ILLEGAL
Note: H=VIH, L=VIL x= VIH or VIL, V = Valid Data, BA= Bank Address, CA+Column Address, RA=Row Address, OC= Op-Code
Integrated Silicon Solution, Inc. — www.issi.com
11
Rev. E
07/28/08
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
