IS41C16257-35K Ver la hoja de datos (PDF) - Integrated Silicon Solution
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IS41C16257-35K Datasheet PDF : 17 Pages
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IS41C16257
IS41LV16257
ISSI ®
TRUTH TABLE
Function
Standby
Read: Word
Read: Lower Byte
RAS LCAS UCAS WE OE Address tR/tC
H
H
H
X
X
X
L
L
L
H
L ROW/COL
L
L
H
H
L ROW/COL
Read: Upper Byte
L
H
L
H
L ROW/COL
Write: Word (Early Write)
Write: Lower Byte (Early Write)
L
L
L
L
X ROW/COL
L
L
H
L
X ROW/COL
Write: Upper Byte (Early Write)
L
H
L
L
X ROW/COL
Read-Write(1,2)
Hidden Refresh2)
RAS-Only Refresh
CBR Refresh(3)
L
L
Read L→H→L L
Write L→H→L L
L
H
H→L
L
L H→L L→H ROW/COL
L
H
L ROW/COL
L
L
X ROW/COL
H
X
X
ROW/NA
L
X
X
X
Notes:
1. These WRITE cycles may also be BYTE WRITE cycles (either LCAS or UCAS active).
2. These READ cycles may also be BYTE READ cycles (either LCAS or UCAS active).
3. At least one of the two CAS signals must be active (LCAS or UCAS).
I/O
High-Z
DOUT
Lower Byte, DOUT
Upper Byte, High-Z
Lower Byte, High-Z
Upper Byte, DOUT
DIN
Lower Byte, DIN
Upper Byte, High-Z
Lower Byte, High-Z
Upper Byte, DIN
DOUT, DIN
DOUT
DOUT
High-Z
High-Z
Integrated Silicon Solution, Inc. — 1-800-379-4774
3
DR004-1B
05/24/99
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