is42s16128 Integrated Silicon Solution, Inc., is42s16128 Datasheet - Page 17

• Manufacturer Part Number: is42s16128
• Description: 128k Words Bits Banks Sdram
• Manufacturer: Integrated Silicon Solution, Inc.

TWO BANKS OPERATION COMMAND TRUTH TABLE
Notes:
1. H: HIGH level input, L: LOW level input, X: HIGH or LOW level input, RA: Row Address, CA: Column Address
2. The device state symbols are interpreted as follows:
Integrated Silicon Solution, Inc. — 1-800-379-4774
Rev. A
03/13/00
IS42S16128
Operation
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF
MRS
I
A
R
W
RP
WP
Any
Idle (inactive state)
Row Active State
Read
Write
Read With Auto-Precharge
Write With Auto-Precharge
Any State
CS RAS CAS WE
H
L
L
L
L
L
L
L
L
X
H
H
H
H
L
L
L
L
X
H
H
H
H
L
L
L
L
X
H
H
H
L
H
L
L
L
A9
X
X
X
H
H
H
H
H
H
H
H
H
X
H
H
X
L
L
L
L
L
L
L
L
L
X
L
L
OPCODE
RA
RA
A8 A7-A0
X
X
X
H
H
H
H
H
H
H
H
H
H
X
L
L
L
L
L
L
L
L
L
L
L
L
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
RA
RA
X
X
X
X
X
X
X
X
X
X
BANK 0 BANK 1
R/W/A/I
R/W/A/I
R/W/A/I
R/W/A
R/W/A
R/W/A
R/W/A
R/W/A
Previous State
R/W
R/W
R/W
R/W
Any
Any
Any
I/A
I/A
I/A
I/A
I/A
I/A
I/A
I/A
I/A
A
A
A
A
I
I
I
I
(1,2)
R/W/A/I
R/W/A/I
R/W/A/I
R/W/A
R/W/A
R/W/A
R/W/A
R/W/A
R/W
R/W
R/W
R/W
Any
Any
Any
I/A
I/A
I/A
I/A
I/A
I/A
I/A
I/A
I/A
A
A
A
A
I
I
I
I
BANK 0 BANK 1
R/W/A/I
Next State
Any
Any
Any
WP
WP
I/A
I/A
I/A
I/A
RP
RP
I/A
I/A
I/A
W
W
A
A
A
R
R
A
A
A
I
I
I
I
I
I
I
R/W/A/I
Any
Any
Any
WP
WP
RP
RP
I/A
I/A
I/A
I/A
I/A
I/A
I/A
W
W
A
R
R
A
A
A
A
A
I
I
I
I
I
I
I
ISSI
17
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