®
IS42S81600A, IS42S16800A, IS42S32400A
IS42LS81600A, IS42LS16800A, IS42LS32400A
ISSI
FUNCTIONAL TRUTH TABLE Continued:
CS
H
L
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
L
L
L
L
L
L
L
L
RAS CAS
WE
Address
Command
DESL
Action
Write Recovering
×
H
H
H
H
L
×
H
H
L
×
×
Nop Enter row active after tDPL
Nop Enter row active after tDPL
Nop Enter row active after tDPL
Begin read (6)
H
L
×
NOP
×
BST
H
L
BA, CA, A10
READ/READA
WRIT/WRITA
ACT
L
BA, CA, A10
Begin new write
ILLEGAL (2)
ILLEGAL (2)
H
H
L
H
L
BA, RA
L
BA, A10
PRE/PALL
REF
L
H
L
×
ILLEGAL
L
L
OC, BA
MRS/EMRS
DESL
ILLEGAL
Write Recovering
with Auto
×
H
H
H
H
L
×
H
H
L
×
H
L
×
Nop Enter precharge after tDPL
Nop Enter precharge after tDPL
Nop Enter row active after tDPL
ILLEGAL
ILLEGAL (2, 6)
ILLEGAL (2)
×
NOP
Precharge
×
BST
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
ILLEGAL (2)
L
H
L
×
ILLEGAL
L
L
OC, BA
MRS/EMRS
DESL
ILLEGAL
Refresh
×
H
H
H
H
L
×
H
H
L
×
H
L
×
Enter idle after tRC1
Nop Enter idle after tRC1
Nop Enter idle after tRC1
ILLEGAL
×
NOP
×
BST
H
L
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
×
EAD/READA
WRIT/WRITA
ACT
L
ILLEGAL
H
H
L
H
L
ILLEGAL
L
PRE/PALL
REF
ILLEGAL
L
H
L
ILLEGAL
L
L
OC, BA
×
MRS/EMRS
DESL
ILLEGAL
Mode Register
Accessing
×
H
H
H
H
L
×
H
H
L
×
H
L
Nop Enter idle after tRSC
Nop Enter idle after tRSC
Nop Enter idle after tRSC
ILLEGAL
×
NOP
×
BST
H
L
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
×
READ/READA
WRIT/WRITA
ACT
L
ILLEGAL
H
H
L
H
L
ILLEGAL
L
PRE/PALL
REF
ILLEGAL
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
Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
ADVANCEDINFORMATION Rev. 00A
15
06/01/02
ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
