GS8170LW36 Datasheet, PDF (6/27 Pages) GSI Technology – 18Mb sigma 1x1Lp CMOS I/O Late Write SigmaRAM

GS8170LW36/72C-333/300/250/200
Byte Write Control
The Byte Write Enable inputs (Bx) determine which bytes will be written. Any combination of Byte Write Enable control pins,
including all or none, may be activated. A Write Cycle with no Byte Write inputs active is a write abort cycle.
Example of x36 Byte Write Truth Table
Function
Read
Write Byte A
Write Byte B
Write Byte C
Write Byte D
Write all Bytes
Write Abort
W
Ba
Bb
Bc
Bd
H
X
X
X
X
L
L
H
H
H
L
H
L
H
H
L
H
H
L
H
L
H
H
H
L
L
L
L
L
L
L
H
H
H
H
CK
Address
ADV
E1
Ba
Bb
DQA0–DQA8
DQB0–DQB8
CQ
Two Byte Write Control Example with Late Write SigmaRAM
Write A
Write B
Write C
Non-Write
Write D
A
B
C
D
Write E
E
D(A)
D(A)
D(B)
D(C)
D(D)
D(E)
D(E)
Rev: 2.03 1/2005
6/27
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology, Inc.