®
IS42S81600A, IS42S16800A, IS42S32400A
IS42LS81600A, IS42LS16800A, IS42LS32400A
ISSI
FUNCTIONAL TRUTH TABLE Continued:
CS
RAS CAS
WE
Address
Command
Action
Read with auto
Precharging
H
×
×
×
×
DESL
Continue burst to end -
Precharge
L
H
H
H
x
NOP
Continue burst to end -
Precharging
L
L
L
L
L
L
L
H
H
H
H
L
H
L
L
×
BST
ILLEGAL
H
L
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
×
READ/READA
WRIT/WRITA
ACT
ILLEGAL (2)
ILLEGAL (2)
ILLEGAL (2)
ILLEGAL (2)
ILLEGAL
L
H
H
L
H
L
L
PRE/PALL
REF
L
H
L
L
L
OC, BA
×
MRS/EMRS
DESL
ILLEGAL
Write with Auto
Precharge
×
×
×
Continue burst to end -Write
recovering with auto precharge
L
H
H
H
×
NOP
Continue burst to end -Write
recoveringwith 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
H
L
BA, CA, A10
READ/READA
WRIT/WRITA
ILLEGAL(2)
ILLEGAL (2)
L
BA, CA, A10
H
H
L
H
L
BA, RA
L
BA, A10
PRE/PALL
REF
ILLEGAL (2)
L
H
L
×
ILLEGAL
L
L
OC, BA
MRS/EMRS
DESL
ILLEGAL
Precharging
×
H
H
H
H
L
×
H
H
L
×
H
L
×
Nop Enter idle after tRP
Nop Enter idle after tRP
ILLEGAL
ILLEGAL (2)
ILLEGAL (2)
×
NOP
×
BST
H
L
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
×
READ/READA
WRIT/WRITA
ACT I
L
H
H
L
H
L
LLEGAL(2)
L
PRE/PALL
REF
Nop Enter idle after tRP
ILLEGAL
L
H
L
L
L
OC, BA
×
MRS/EMRS
DESL
ILLEGAL
Row Activating
×
H
H
H
H
L
×
H
H
L
×
H
L
Nop Enter bank active after tRCD
Nop Enter bank active after tRCD
ILLEGAL
ILLEGAL (2)
ILLEGAL (2)
ILLEGAL (2,8)
ILLEGAL (2)
×
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
L
H
L
ILLEGAL
L
L
OC, BA
MRS/EMRS
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
14
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
ADVANCEDINFORMATION Rev. 00A
06/01/02
ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
