Cypress CY7C1471BV33 Manual De Usuario
CY7C1471BV33
CY7C1473BV33, CY7C1475BV33
Document #: 001-15029 Rev. *B
Page 12 of 32
The read/write truth table for CY7C1471BV33 follows.
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
L
H
H
H
H
Write Byte A – (DQ
A
and DQP
A
)
L
L
H
H
H
Write Byte B – (DQ
B
and DQP
B
)
L
H
L
H
H
Write Byte C – (DQ
C
and DQP
C
)
L
H
H
L
H
Write Byte D – (DQ
D
and DQP
D
)
L
H
H
H
L
Write All Bytes
L
L
L
L
L
The read/write truth table for CY7C1473BV33 follows.
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
)
L
L
H
Write Byte b – (DQ
b
and
DQP
b
)
L
H
L
Write Both Bytes
L
L
L
The read/write truth table for CY7C1475BV33 follows.
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)
L
L
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.