CY7C1471BV33
CY7C1473BV33, CY7C1475BV33
Document #: 001-15029 Rev. *B Page 12 of 32
The read/write truth table for CY7C1471BV33 follows.
[1, 2, 8]
Truth Table for Read/Write
Function
WE BW
A
BW
B
BW
C
BW
D
Read H X X X X
Write No bytes written LHHHH
Write Byte A – (DQ
A
and DQP
A
) L LHHH
Write Byte B – (DQ
B
and DQP
B
)LHLHH
Write Byte C – (DQ
C
and DQP
C
)LHHLH
Write Byte D – (DQ
D
and DQP
D
) LHHHL
Write All Bytes L L L L L
The read/write truth table for CY7C1473BV33 follows.
[1, 2, 8]
Truth Table for Read/Write
Function
WE BW
a
BW
b
Read H X X
Write – No Bytes Written L H H
Write Byte a – (DQ
a
and
DQP
a
)LLH
Write Byte b – (DQ
b
and
DQP
b
)LHL
Write Both Bytes L L L
The read/write truth table for CY7C1475BV33 follows.
[1, 2, 8]
Truth Table for Read/Write
Function
WE BW
x
Read H X
Write – No Bytes Written L H
Write Byte X − (DQ
x
and
DQP
x)
LL
Write All Bytes L All BW
= L
Note
8. Table only lists a partial listing of the byte write combinations. Any combination of BW
X
is valid. Appropriate write is based on which byte write is active.
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