Document #: 38-05447 Rev. *G Page 9 of 13
Figure 9 shows BHE
/BLE controlled, OE LOW write cycle waveforms.
[22]
Figure 9. Write Cycle No. 4
Truth Table
CE
1
CE
2
WE OE BHE BLE Inputs/Outputs Mode Power
HXXXXXHigh Z Deselect / Power Down Standby (I
SB
)
XLXXXXHigh Z Deselect / Power Down Standby (I
SB
)
XXXXHHHigh Z Deselect / Power Down Standby (I
SB
)
L H H L L L Data Out (I/O
0
–I/O
15
) Read Active (I
CC
)
L H H L H L Data Out (I/O
0
–I/O
7
);
High Z (I/O
8
–I/O
15
)
Read Active (I
CC
)
LHHLLHHigh Z (I/O
0
–I/O
7
);
Data Out (I/O
8
–I/O
15
)
Read Active (I
CC
)
L H H H L H High Z Output Disabled Active (I
CC
)
LHHHHLHigh Z Output Disabled Active (I
CC
)
L H H H L L High Z Output Disabled Active (I
CC
)
L H L X L L Data In (I/O
0
–I/O
15
) Write Active (I
CC
)
L H L X H L Data In (I/O
0
–I/O
7
);
High Z (I/O
8
–I/O
15
)
Write Active (I
CC
)
LHLXLHHigh Z (I/O
0
–I/O
7
);
Data In (I/O
8
–I/O
15
)
Write Active (I
CC
)
Switching Waveforms (continued)
t
HD
t
SD
t
SA
t
HA
t
AW
t
WC
VALID DATA
t
BW
t
SCE
t
PWE
NOTE 23
CE
1
ADDRESS
CE
2
WE
DATA IO
BHE
/BLE
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