is42s16160a1-7t Integrated Silicon Solution, Inc., is42s16160a1-7t Datasheet - Page 10

• Manufacturer Part Number: is42s16160a1-7t
• Description: 256 Mb Synchronous Dram
• Manufacturer: Integrated Silicon Solution, Inc.

IS42S83200A1
IS42S16160A1
10
FUNCTION TRUTH TABLE (continued)
ABBREVIATIONS:
H=High Level, L=Low Level, X=Don't Care
BA=Bank Address, RA=Row Address, CA=Column Address, NOP=No OPeration
NOTES:
1. All entries assume that CKE was High during the preceding clock cycle and the current clock cycle.
2. ILLEGAL to bank in specified state; function may be legal in the bank indicated by BA, depending on the state of
3. Must satisfy bus contention, bus turn around, write recovery requirements.
4. NOP to bank precharging or in idle state. May precharge bank indicated by BA.
5. ILLEGAL if any bank is not idle.
ILLEGAL = Device operation and/or data-integrity are not guaranteed.
Current State
that bank.
REGISTER
FRESHING
SETTING
MODE
RE-
(4-bank x 8,388,608 - word x 8-bit)
(4-bank x 4,194,304 - word x 16-bit)
/CS
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
/RAS
X
H
H
H
X
H
H
H
L
L
L
L
L
L
L
L
/CAS
X
H
H
H
H
X
H
H
H
H
L
L
L
L
L
L
/WE
X
H
X
H
H
X
H
X
H
H
L
L
L
L
L
L
X
X
X
BA, CA, A10
BA, RA
BA, A10
X
Op-Code,
Mode-Add
X
X
X
BA, CA, A10
BA, RA
BA, A10
X
Op-Code,
Mode-Add
Address
READ / WRITE ILLEGAL
READ / WRITE ILLEGAL
Integrated Silicon Solution, Inc. — 1-800-379-4774
PRE / PREA
PRE / PREA
Command
DESEL
DESEL
TBST
REFA
TBST
REFA
NOP
MRS
NOP
MRS
ACT
ACT
NOP (Idle after tRC)
NOP (Idle after tRC)
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
NOP (Idle after tRSC)
NOP (Idle after tRSC)
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
Action
ISSI
10/28/05
Rev. B
®