Document Number: 002-03314 Rev. *C Page 13 of 18
Truth Table
CE OE WE BLE BHE I/O
0
–I/O
7
I/O
8
–I/O
15
Mode Power
HX
[31]
X
[31]
X
[31]
X
[31]
High-Z High-Z Power down Standby (I
SB
)
L L H L L Data out Data out Read all bits Active (I
CC
)
L L H L H Data out High-Z Read lower bits only Active (I
CC
)
L L H H L High-Z Data out Read upper bits only Active (I
CC
)
L X L L L Data in Data in Write all bits Active (I
CC
)
L X L L H Data in High-Z Write lower bits only Active (I
CC
)
L X L H L High-Z Data in Write upper bits only Active (I
CC
)
L H H X X High-Z High-Z Selected, outputs disabled Active (I
CC
)
L X X H H High-Z High-Z Selected, outputs disabled Active (I
CC
)
Note
31. The input voltage levels on these pins should be either at V
IH
or V
IL
.
