GS8128218GD-250I Datasheet, PDF (10/37 Pages) GSI Technology – 8M x 18, 4M x 36 144Mb S/DCD Sync Burst SRAMs

GS8128218/36(GB/GD)-400/333/250/200
Byte Write Truth Table
Function
GW
BW
BA
BB
BC
BD
Read
H
H
X
X
X
X
Write No Bytes
H
L
H
H
H
H
Write byte a
H
L
L
H
H
H
Write byte b
H
L
H
L
H
H
Write byte c
H
L
H
H
L
H
Write byte d
H
L
H
H
H
L
Write all bytes
H
L
L
L
L
L
Write all bytes
L
X
X
X
X
X
Notes:
1. All byte outputs are active in read cycles regardless of the state of Byte Write Enable inputs, BA, BB, BC and/or BD.
2. Byte Write Enable inputs BA, BB, BC and/or BD may be used in any combination with BW to write single or multiple bytes.
3. All byte I/Os remain High-Z during all write operations regardless of the state of Byte Write Enable inputs.
4. Bytes “C” and “D” are only available on the x32 and x36 versions.
Notes
1
1
2, 3
2, 3
2, 3, 4
2, 3, 4
2, 3, 4
Rev: 1.01 5/2017
10/36
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
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